Bibliografías temáticas / Effective permeability

Literatura académica sobre el tema "Effective permeability"

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Publicado: 4 de junio de 2021

Última modificación: 30 de mayo de 2022

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Artículos de revistas sobre el tema "Effective permeability"

Sihvola, A. H. y I. V. Lindell. "Effective Permeability of Mixtures". Progress In Electromagnetics Research 06 (1992): 153–80. http://dx.doi.org/10.2528/pier90010600.

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Babadagli, Tayfun. "Effective Permeability Estimation for 2-D Fractal Permeability Fields". Mathematical Geology 38, n.º 1 (enero de 2006): 33–50. http://dx.doi.org/10.1007/s11004-005-9002-z.

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Halauddin, Halauddin, Suhendra Suhendra y Muhammad Isa. "Lattice Gas Automata Applications to Estimate Effective Porosity and Permeability Barrier Model of the Triangle with a Height Variation". Journal of Aceh Physics Society 9, n.º 2 (1 de mayo de 2020): 48–54. http://dx.doi.org/10.24815/jacps.v9i2.16056.

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Penelitian ini bertujuan untuk menghitung porositas efektif (фeff) dan permeabilitas (k) menggunakan model segitiga dengan variasi tinggi yaitu 3, 4, 5, 6 dan 7 cm. Perhitungan porositas dan permeabilitas yang efektif dilakukan dengan menggunakan model Lattice Gas Automata (LGA), yang diimplementasikan dengan bahasa pemrograman Delphi 7.0. Untuk model segitiga penghalang dengan tinggi 3, 4, 5, 6 dan 7 cm, nilai porositas efektif dan permeabilitas, masing-masing: фeff (T1) = 0,1690, k (T1) = 0 , 001339 pixel2; фeff (T2) = 0,1841, k (T2) = 0,001904 pixel2; фeff (T3) = 0,1885, k (T3) = 0,001904 pixel2; фeff (T4) = 0,1938, k (T4) = 0001925 pixel2; dan фeff (T5) = 0,2053, k (T5) = 0,002400 pixel2. Dari hasil simulasi, diperoleh tinggi segitiga akan berpengaruh signifikan terhadap nilai porositas efektif dan permeabilitas. Pada segitiga lebih tinggi, menyebabkan tabrakan model aliran fluida LGA mengalami lebih banyak hambatan untuk penghalang, sehingga porositas efektif dan permeabilitas menurun. Sebaliknya, jika segitiga lebih rendah, menyebabkan tabrakan model aliran fluida LGA mengalami lebih sedikit hambatan untuk penghalang, sehingga porositas efektif dan permeabilitas meningkat.This research purposed to calculate the effective porosity (feff) and permeability (k) using the barrier model of the triangle with a high varying are 3, 4, 5, 6 and 7 cm. Effective porosity and permeability calculations performed using the model Lattice Gas Automata (LGA), which is implemented with Delphi 7.0 programming language. For model the barrier triangle with a high of 3, 4, 5, 6 and 7 cm, the value of effective porosity and permeability, respectively: feff(T1)=0,1690, k(T1)=0,001339 pixel2; feff(T2)=0,1841, k(T2)=0,001904 pixel2; feff(T3)=0,1885, k(T3)=0,001904 pixel2; feff(T4)=0,1938, k(T4)= 0001925 pixel2; and feff(T5)=0,2053, k(T5)=0,002400 pixel2. From the simulation results, obtained by the high of the triangle will be a significant effect on the value of effective porosity and permeability. If the triangle highest, causing the collision of fluid flow models LGA experience more obstacles to the barrier, so that the effective porosity and permeability decrease. Conversely, if the triangle lower, causing the collision of fluid flow models LGA experience less obstacles to the barrier, so that the effective porosity and permeability increases.Keywords: Effective porosity, permeability, model triangle, model LGA

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Selvadurai, A. P. S. y P. A. Selvadurai. "Surface permeability tests: experiments and modelling for estimating effective permeability". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 466, n.º 2122 (14 de mayo de 2010): 2819–46. http://dx.doi.org/10.1098/rspa.2009.0475.

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This paper presents a technique for determining the near surface permeability of geomaterials and involves the application of a uniform flow rate to an open central region of a sealed annular patch on an otherwise unsealed flat surface. Darcy’s flow is established during attainment of a steady pressure at a constant flow rate. This paper describes the experimental configuration and its theoretical analysis via mathematical and computational techniques. The methods are applied to investigate the surface permeability characteristics of a cuboidal block of Indiana limestone measuring 508 mm. An inverse analysis procedure is used to estimate the permeability characteristics at the interior of the Indiana limestone block. The resulting spatial distribution of permeability is used to estimate the effective permeability of the tested block.

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Amirkhizi, Alireza V. y Sia Nemat-Nasser. "Composites with tuned effective magnetic permeability". Journal of Applied Physics 102, n.º 1 (julio de 2007): 014901. http://dx.doi.org/10.1063/1.2751084.

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Li, M., W. L. Xiao, Y. Bernabé y J. Z. Zhao. "Nonlinear effective pressure law for permeability". Journal of Geophysical Research: Solid Earth 119, n.º 1 (enero de 2014): 302–18. http://dx.doi.org/10.1002/2013jb010485.

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Ooura, H., K. Yanagi y K. Emoto. "Effective Permeability of CoNbZr Amorphous Films". IEEE Translation Journal on Magnetics in Japan 2, n.º 5 (mayo de 1987): 477–78. http://dx.doi.org/10.1109/tjmj.1987.4549498.

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Saucier, Antoine. "Effective permeability of multifractal porous media". Physica A: Statistical Mechanics and its Applications 183, n.º 4 (mayo de 1992): 381–97. http://dx.doi.org/10.1016/0378-4371(92)90290-7.

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Gorshkov, A. M., I. S. Khomyakov y M. V. Subbotina. "Influence of Effective Stress on Absolute Permeability of Ultralow-Permeability Rocks". IOP Conference Series: Earth and Environmental Science 459 (15 de abril de 2020): 022067. http://dx.doi.org/10.1088/1755-1315/459/2/022067.

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Nœtinger, Benoît. "Computing the effective permeability of log-normal permeability fields using renormalization methods". Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 331, n.º 5 (septiembre de 2000): 353–57. http://dx.doi.org/10.1016/s1251-8050(00)01412-9.

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Tesis sobre el tema "Effective permeability"

Paleologos, Evangelos Konstantinos 1958. "Effective hydraulic conductivity of bounded, strongly heterogeneous porous media". Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/191184.

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This dissertation develops analytical expressions for the effective hydraulic conductivity Kₑ of a three-dimensional porous medium bounded by two parallel planes of infinite extent separated by a distance 2a. Head varies randomly along each boundary about a uniform mean value. The log hydraulic conductivity Y forms a homogeneous, statistically anisotropic random field having a variance σᵧ² and principal integral scales λ₁, λ₂, λ₃. Flow is uniform in the mean parallel to the principal coordinate χ₁. A solution is first derived for mildly nonuniform media with σᵧ² ≪ 1 via an approximate form of the 1993 residual flux theory by Neuman and Orr. It is then extended to strongly nonuniform media with arbitrarily large σᵧ² by invoking the Landau-Lifshitz conjecture as Kₑ = KG exp {σᵧ² [1/2 — (D + S)]} . Here, K(G) is the geometric mean of hydraulic conductivities and D and S are domain and surface integrals, respectively. Based on a rigorous limiting analysis we show that when the length scale ratio p = a / λ₁ → 0, Kₑ is equal to the arithmetic mean hydraulic conductivity K(A). This supports the theoretical finding of Neuman and Orr and the numerical result by Desbarats. When ρ → ∞ we obtain expressions for Kₑ that have been previously derived in the stochastic literature for infinite flow domains. For strongly anisotropic media with integral scale ratios ε₂ = λ₂ / λ₁ and ε₃ = λ₃ / λ₁ equal to each other and tending to zero or infinity ( ) i 0) we obtain the closed form solution Kₑ = K(G) exp {σᵧ²[exp(—p) — 0 .5]} . The latter reduces to K(A) when ρ → 0 and tends to the harmonic mean K(H) as ρ → ∞. One can think of the case ε₂ = ε₃ = 0 as mean flow along parallel channels having mutually uncorrelated hydraulic conductivities, and of the case ε₂ = ε₃ → ∞ as mean flow normal to layers having uniform hydraulic conductivities. For statistically isotropic media we show numerically that Kₑ equals K(A) when ρ = 0.01; when ρ ≥ 4, Kₑ = K(G) exp(σᵧ²/6) the three-dimensional infinite domain solution. Our results support the analytical finding of Rubin and Dagan, and predict and explain all related bounded domain numerical results. Finally, contrary to Dagan's assertion, we show that for small ρ boundary effects are extremely important; the absolute value of the surface integral S equals the value of the domain integral D.

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Lancaster, James William. "Multi-scale estimation of effective permeability within the Greenholes Beck catchment". Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369589.

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Rinkevich, A. B., M. I. Samoylovich y A. F. Belyanin. "Effective Conductivity and Magnetic Permeability of Nanostructured Materials in Magnetic Field". Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35340.

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The problem of homogenization the nanostructured materials placed in DC magnetic field has been discussed. The experimental data are obtained using metallic superlattices, metal-dielectric thin films and 3D-nanostructured materials. All these materials contain ferro- or ferrimagnetic component. The trans-mission and reflection coefficients were measured on the waves of millimeter waveband. It has been shown that the experimental frequency spectra of the coefficients in zero magnetic field can be described by the effective conductivity and dielectric permittivity. The spectra of ferromagnetic resonance, however, cannot be calculated correctly with the averaged magnetization. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35340

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Drews, Michael C. "Modelling stress-dependent effective porosity-permeability relationships of metre-scale heterogeneous mudstones". Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1672.

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The importance of shales and mudstones to applied geosciences and in particular to fluid migration in sedimentary basins has never been more recognized than today. Prominent examples are conventional or unconventional petroleum systems, where shales and mudstones act as source, reservoir or cap rock, but also CO2 and nuclear waste storage or hydrogeology. Despite their importance, shales and mudstones are yet not as far well understood as sandstones or carbonate rocks. In particular, the influence of heterogeneity on fluid migration has been poorly addressed in the past, although many authors have identified and studied heterogeneities in shales and mudstones. Nevertheless, their flow properties are fairly well understood when treated as homogeneous on sample scale (centimetre-scale). Typical flow relevant heterogeneities are grain size and thus petrophysical property (e.g. porosity, permeability, capillary entry pressures) variations due to spatial lithological variation induced by primary and secondary sedimentary structures. In this study we investigate flow relevant heterogeneities of shales and mudstones on submetre scale derived from core and borehole images from an off-shore gas field in the Western Nile Delta, Egypt. Thereby, we combine latest models and published measurements of sample-scale petrophysical properties with interpretation, quantitative analyses, advanced modelling and numerical fluid flow simulation to assess the influence of shale and mudstone heterogeneity on fluid flow and hence, fluid migration, retention and mudstone seal capacity. Additionally, the set of mudstone heterogeneities used in this study has been derived from a combined visual and geostatistical interpretation of more than 500 m of mud-rich core and borehole images. As final results, we deliver stress-dependent effective porosity-permeability relationships for a broad range of shale and mudstone heterogeneities, representative model sizes and resolution as well as measures of uncertainty for each heterogeneity type. Moreover, probability density functions describing where and how these heterogeneities appear in larger scale geological units, such as seismic facies or local depositional environments, are provided. As a key result, heterogeneity and lithological variation have great influences on effective permeability and effective permeability anisotropy (Kh/Kv). Furthermore, our results indicate that mudstone heterogeneity is very common in all investigated larger scale geological units (hemipelagites, levees, channels). Modelling of fluid flow through mud-rich sedimentary basins without inclusion of these sub-metre scale heterogeneities of mudstones can therefore lead to misleading results. Thus, effective porosity-permeability (anisotropy) relationships are provided for different lithological variations and mudstone heterogeneities as a final result.

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Chen, Chien-Cheng. "An investigation into the relationship between effective stress and permeability of clays". Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320827.

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DELGADO, CARLOS WILFREDO CARRILLO. "DEVELOPMENT OF AN EQUIPMENT FOR THE STUDY OF EFFECTIVE PERMEABILITY IN MULTIPHASE MEDIA". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2000. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2032@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
O trabalho apresenta uma ampla revisão de conceitos básicos associados ao fluxo multifásico (fluxo simultâneo de dois ou mais fluidos) em meios porosos, bem como técnicas de ensaios e equipamentos utilizados na determinação de permeabilidades efetiva e absoluta em solos saturados e não saturados com água. Com base nesta revisão, e visando a medida da permeabilidade de solos não saturados submetidos a fluxo de misturas gasolina-álcool, foi projetados, construído e colocado em operação um sistema de permeâmetros de parede flexível com controle de sucção; foi desenvolvido um software de controle e implementando um sistema automático de monitoramento da instrumentação eletrônica utilizada para medidas de variação de volume, de pressões e de deslocamentos axiais das amostras desolo; foi implementado um sistema de bomba de fluxo para aplicação de vazões constantes nos ensaios de permeabilidade, e forma desenvolvidos sistemas de medição do volume dos líquidos e gases passando pela amostra sob diferentes gradientes de pressão. Todos os desenvolvimentos projetados e implementados são descritos em detalhe. Características de uso dos equipamentos e aspectos de calibração da instrumentação eletrônica e demais acessórios são discutidos, procurando-se definir limites de trabalhabilidade, eventuais deficiências e técnicas alternativas de ensaios envolvendo o uso de misturas álcool gasolina. Visando avaliar o comportamento dos equipamentos e acessórios desenvolvidos, apresenta-se e discute-se resultados de um programa experimental envolvendo a) o uso de amostras de um solo inerte, incompressível dentro dos níveis de tensões efetivas aplicadas, preparadas em laboratório utilizando técnicas especiais de modo a se obter uma estrutura repetitiva, fracamente cimentada, simulando os solos residuais de gnaisse; b) execução de ensaios de vazão constante visando a determinação da permeabilidade absoluta de amostras saturadas utilizando como fluidos permeantes água, ar gasolina e álcool; c) execução de ensaios de vazão constante visando a determinação das permeabilidades efetivas à água e ao ar de amostras não saturadas, submetidas a sucções constantes variando de cerca de 10 a 60 kPa. Os resultados obtidos indicam que o equipamento desenvolvido e as técnicas experimentais implementadas constituem ferramentas versáteis que possibilitam a determinação direta das permeabilidades absolutas e efetivas de forma relativamente simples e confiáveis.
This work presents a wide revision of basic concepts associated to the multiphase flow (simultaneous flow of two or more fluids) in porous media as well as techniques of test and equipment s used in the determination of effective and absolute permeability in saturated and not saturated soils with water.With basis in this revision, and locking for the measure of saturated soils permeability submitted to flow of mixtures gasoline-alcohol, it was projected, built and placed in operation a system of flexible wall permeameters with suction control; a control software was developed and implementing an automatic system of monitoring of the electronic instrumentation used for measures of change volume, pressures and axial displacements of the soil samples; a flow pump system was implemented for application of constant rate in the permeability test, and systems of measurement of the volume of the liquids and gases were developed going by the sample under different pressure gradients.All the projected developments and implemented are described in detail. Characteristics of the used equipment s and calibration aspects of the electronic instrumentation and other accessories are discussed, trying to define workability limits, eventual deficiencies and techniques alternatives of testing involving the use of alcohol gasoline mixtures. Look in for evaluate the performance of equipment s and developed accessories, are presented and it is discussed results of an experimental program involving a) the use of samples of a inert soil, incompressible between levels of applied effective tensions,prepared in labortory using special techniques in way obtaining a repetitive structure, weakly cemented, simulating the residual soils of gnaisse; b) execution of constant rate test looking for the absolute permeability determination of saturated samples using as percolate fluids water, air, gasoline and alcohol; c) execution of constant rate test looking for the determination of the effective permeability to the water and the air of non saturated samples, submitted to constant suctions varying about 10 to 60 kPa.The obtained results indicate that the developed equipment and the implemented experimental techniques constitute versatile tools that make possible the direct determination of the absolute and effective permeabilities in way relatively simple and you trusted.
EL trabajo presenta una amplia revisión de conceptos básicos asociados al flujo multifásico (flujo simultáneo de Dos o más fluidos) en medios porosos, así como técnicas de ensayos y equipamentos utilizados en la determinación de permeabilidades efectiva y absoluta en suelos saturados y no saturados con agua. Con el objetivo de medir la permeabilidad de suelos no saturados sometidos a flujo de mezclas de gasolina y alcohol, fue proyectados, construido y colocado en operación un sistema de permeámetros de pared flexible con control de succión; se desarrolló un software de control y se implementó un sistema automático de monitoramiento de la instrumentación eletrónica utilizada para medidas de variación de volumen, de presiones y de desplazamientos axiales de las muestras de suelo. Se implementó además; un sistema de bomba de flujo para aplicación de desbordamientos constantes en los ensayos de permeabilidad, y se deasarrollaron sistemas de medición del volumen de los líquidos y gases pasando por la muestra bajo diferentes gradientes de presión. Se detallan todos los desarrollos proyectados e implementaciones. Se discute las características de uso de los equipamentos y aspectos de calibración de la instrumentación eletrónica y demás accesorios, con el objetivo de definir límites de trabajabilidad, eventuales deficiencias y técnicas alternativas de ensayos que envuelven el uso de mezclas de alcohol u gasolina. Para evaluar el comportamiento de los equipos y accesorios desarrollados, se presentan y discuten los resultados de un programa experimental que considera a) el uso de muestras de un suelo inerte, incompresible dentro de los níveles de tensiones efectivas que fueron aplicadas, preparadas en laboratorio utilizando técnicas especiales para obtener una extructura repetitiva, debilmente cimentada, simulando suelos residuales de gnaise; b) ejecución de ensayos de desbordamiento constante visando la determinación de la permeabilidad absoluta de muestras saturadas utilizando como fluidos permeantes agua, ar gasolina y álcool; c) ejecución de ensayos de desbordamiento constante con el objetivo de determinar las permeabilidades efectivas a agua y aire de muestras no saturadas, sometidas a succiones constantes variando entre 10 a 60 kPa. Los resultados obtenidos indican que el equipo desarrollado y las técnicas experimentales implementadas constituyen herramientas versátiles que hacen posible la determinación directa de las permeabilidades absolutas y efectivas de forma relativamente simple y confiables.

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Mckernan, Rosanne. "An experimental investigation into the stress dependent fluid transport properties of mudstones". Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/an-experimental-investigation-into-the-stress-dependent-fluid-transport-properties-of-mudstones(17efbf46-29a3-44d1-afd3-194709418c90).html.

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Measuring transport properties of rock samples under stress is essential to understanding and predicting the migration of fluids within the Earth's crust. Mudrocks play an essential role in petroleum systems as they are often the source rock and may act as a seal due to their low permeability. With increasing production from unconventional reservoirs where the mudrock is source, reservoir and seal, there is now even greater demand to understand the permeability and storativity of mudstones and tight sandstones. When hydraulic fracture treatment is used to enhance production, flow of hydrocarbons into the fractures will be ultimately controlled by the matrix permeability. Knowledge of the fluid transport properties of mudstones is currently hindered by a scarcity of published experimental data. In this thesis, a combination of permeability and ultrasonic velocity measurements allied with image analysis is used to distinguish the primary microstructural controls on effective stress dependent permeability. Permeabilities of cylindrical samples of Whitby Mudstone and Eagle Ford Shale have been measured using the oscillating pore pressure method at confining pressures ranging between 30-95 MPa and pore pressures ranging between 1-80 MPa. The results show that samples must be pressure cycled in order to obtain a reproducible behaviour, after which the relationship between permeability and effective stress can be described by an exponential law. The permeability of the Whitby Mudstone samples ranges between 7 ×10-21 m2 and 2 ×10-19 m2 (7 nd to 188 nd) and decreases by ~1 order of magnitude across the applied effective stress range. The permeability of the Eagle Ford Shale samples is slightly higher ranging between 2 ×10-18 m2 and 42 ×10-18 m2 (2 μd to 42 μd) and decreases by half an order of magnitude across the applied effective stress range. Permeability is shown to be more sensitive to changes in pore pressure than changes in confining pressure yielding values of alpha between 1.1-2.1 for Whitby Mudstone and 1.6-4.6 for Eagle Ford Shale. Gas slippage (Klinkenberg) effects are restricted to pore pressures below 10 MPa in the Whitby Mudstone and therefore do not affect the results presented. The permeability-effective stress relationship is thus empirically described using a modified effective stress law in terms of confining pressure, pore pressure and a Klinkenberg effect. Use of a simple reservoir model demonstrates that if pressure dependent permeability is not taken into account, substantial overestimation of gas flow rate and original gas in place will be made from well tests. Changes in ultrasonic velocity and pore volume were related to the observed loss of permeability with increasing effective stress, providing further insight into the nature of the permeability-controlling pore network. Combining the petrophysical data with pore conductivity modelling and microstructural analysis shows that at low effective stresses, permeability is controlled by a network of long, thin crack-like pores associated with grain boundaries. At high effective stresses, these cracks are closed and fluid is restricted to flowing through a less permeable network of higher aspect ratio, stiffer, nm-scale pores in the clay matrix. Applying the methods developed in the present work to different mudstones with a range of compositions and textures will help to refine understanding of the variability in fluid-conducting pore networks, thereby advancing the interpretation of data from well logs and well tests used for reservoir evaluation.

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Carballo, Salas Jose Gilberto. "Alleviation of effective permeability reduction of gas-condensate due to condensate buildup near wellbore". Texas A&M University, 2004. http://hdl.handle.net/1969.1/3245.

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When the reservoir pressure is decreased below dew point pressure of the gas near the wellbore, gas-condensate wells start to decrease production because condensate is separated from the gas around the wellbore causing a decrease in gas relative permeability. This effect is more dramatic if the permeability of the reservoir is low. The idea proposed for reducing this problem is to eliminate the irreducible water saturation near the wellbore to leave more space for the gas to flow and therefore increase the productivity of the well. In this research a simulation study was performed to determine the range of permeabilities where the cylinder of condensate will seriously affect the wellÂs productivity, and the distance the removal of water around the wellbore has to be extended in order to have acceleration of production and an increase in the final reserves. A compositional-radial reservoir was simulated with one well in the center of 109 grids. Three gas-condensate fluids with different heptanes plus compositions ( 4, 8 and 11 mole %), and two irreducible water saturations were used. The fitting of the Equation of State (EOS) was performed using the method proposed by Aguilar and McCain. Several simulations were performed with several permeabilities to determine the permeabilities for which the productivity is not affected by the presence of the cylinder of condensate. At constant permeability, various radii of a region of zero initial water saturation around the wellbore were simulated and comparisons of the effects of removal of irreducible water on productivity were made. Reservoirs with permeabilities lower than 100 mD showed a reduction in the ultimate reserves due to the cylinder of condensate. The optimal radius of water removal depends on the fluid composition and the irreducible water saturation of the reservoir. The expected increase in reserves due to water removal varies from 10 to 80 % for gas production and from 4 to 30% for condensate production.

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Teimoori, Sangani Ahmad Petroleum Engineering Faculty of Engineering UNSW. "Calculation of the effective permeability and simulation of fluid flow in naturally fractured reservoirs". Awarded by:University of New South Wales. School of Petroleum Engineering, 2005. http://handle.unsw.edu.au/1959.4/22408.

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This thesis is aimed to calculate the effective permeability tensor and to simulate the fluid flow in naturally fractured reservoirs. This requires an understanding of the mechanisms of fluid flow in naturally fractured reservoirs and the detailed properties of individual fractures and matrix porous media. This study has been carried out to address the issues and difficulties faced by previous methods; to establish possible answers to minimise the difficulties; and hence, to improve the efficiency of reservoir simulation through the use of properties of individual fractures. The methodology used in this study combines several mathematical and numerical techniques like the boundary element method, periodic boundary conditions, and the control volume mixed finite element method. This study has contributed to knowledge in the calculation of the effective permeability and simulation of fluid flow in naturally fractured reservoirs through the development of two algorithms. The first algorithm calculates the effective permeability tensor by use of properties of arbitrary oriented fractures (location, size and orientation). It includes all multi-scaled fractures and considers the appropriate method of analysis for each type of fracture (short, medium and long). In this study a characterisation module which provides the detail information for individual fractures is incorporated. The effective permeability algorithm accounts for fluid flows in the matrix, between the matrix and the fracture and disconnected fractures on effective permeability. It also accounts for the properties of individual fractures in calculation of the effective permeability tensor. The second algorithm simulates flow of single-phase fluid in naturally fractured reservoirs by use of the effective permeability tensor. This algorithm takes full advantage of the control volume discretisation technique and the mixed finite element method in calculation of pressure and fluid flow velocity in each grid block. It accounts for the continuity of flux between the neighbouring blocks and has the advantage of calculation of fluid velocity and pressure, directly from a system of first order equations (Darcy???s law and conservation of mass???s law). The application of the effective permeability tensor in the second algorithm allows us the simulation of fluid flow in naturally fractured reservoirs with large number of multi-scale fractures. The fluid pressure and velocity distributions obtained from this study are important and can considered for further studies in hydraulic fracturing and production optimization of NFRs.

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Xu, Chuntang. "Estimation of effective compressibility and permeability of porous materials with differential acoustic resonance spectroscopy /". May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Libros sobre el tema "Effective permeability"

Carleton, Glen B. Design and analysis of tracer tests to determine effective porosity and dispersivity in fractured sedimentary rocks, Newark Basin, New Jersey. West Trenton, N.J: U.S. Dept. of the Interior, U.S. Geological Survey, 1999.

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L, Thompson Michael, McBride John F y Hazardous Waste Engineering Research Laboratory., eds. Determination of effective porosity of soil materials: Project summary. Cincinnati, OH: U.S. Environmental Protection Agency, Hazardous Waste Engineering Research Laboratory, 1988.

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American Society of Civil Engineers., ed. Standard guideline for fitting saturated hydraulic conductivity using probability density functions ASCE/EWRI 50-08: Standard guideline for calculating the effective saturated hydraulic conductivity ASCE/EWRI 51-08. Reston, Va: American Society of Civil Engineers, 2008.

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Lindvall, Daniel. Democracy and the Challenge of Climate Change. International Institute for Democracy and Electoral Assistance, 2021. http://dx.doi.org/10.31752/idea.2021.88.

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Climate change actions in democracies face perceived challenges such as short-term bias in decision-making, policy capture or inconsistency, weak accountability mechanisms and the permeability of the policy-making process to interests adverse to fighting climate change through the role of money in politics. Apart from its intrinsic value to citizens, democracy also brings critical advantages in formulating effective climate policy, such as representative parliaments which can hold governments to account, widespread civic participation, independent media and a free flow of information, the active engagement by civil society organizations in policymaking and the capacity for institutional learning in the face of complex issues with long-term and global social and political implications. International IDEA’s work on change and democracy aims to support democratic institutions to successfully confront the climate crisis by leveraging their advantages and overcoming the challenges to formulating effective and democratically owned climate policy agendas.

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Locatelli, Francesco, Celestina Manzoni, Giuseppe Pontoriero, Vincenzo La Milia y Salvatore Di Filippo. Haemofiltration and haemodiafiltration. Editado por Jonathan Himmelfarb. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199592548.003.0260_update_001.

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Many observational studies have consistently shown that high-flux haemodialysis (hf-HD) has positive effects on the survival and morbidity of uraemic patients when compared with low-flux haemodialysis, and mainly considering the results of Membrane Permeability Outcome (MPO) studies there is evidence favouring high-flux treatments. A further improvement in convective treatments is represented by the on-line modality. On-line preparation from fresh dialysate by a cold-sterilizing filtration process is a cost-effective method of providing large volumes of infusion solution. Randomized, controlled, large-sized trials with long follow-up in haemofiltration (HF) are unfortunately lacking, possibly suggesting the difficulties in performing these trials, mainly in providing the same urea Kt/V considered adequate in HD. On-line haemodiafiltration (HDF) is considered the most efficient technique of using high-flux membranes, and clearances of small solutes like urea are higher in HDF than in HF and of middle solutes like β‎‎‎2-microglobulin are higher than in hf-HD. Thus HDF, as a strategy based on simultaneous diffusive and convective transport, may combine the beneficial effects of diffusive standard HD with the possible advantages of convective HF. Five large, randomized controlled trials just concluded are inconclusive in definitively clarifying the impact of on-line HDF on chronic kidney disease stage 5 patient outcomes.

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Capítulos de libros sobre el tema "Effective permeability"

Saucier, Antoine. "Scaling of the Effective Permeability in Multifractal Reservoirs". En North Sea Oil and Gas Reservoirs — III, 273–76. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0896-6_23.

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Selvadurai, P. A. y A. P. S. Selvadurai. "THE ROLE OF MODELING AND SIMULATIONS IN ESTIMATING MULTISCALE EFFECTIVE PERMEABILITY". En Multiscale and Multiphysics Processes in Geomechanics, 73–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19630-0_19.

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Boulhafa, E., R. Kouddane, H. Ouadfel y F. Soussi. "Estimation of the Effective Magnetic Permeability of Polycrystals Using a Self-consistent Scheme". En Lecture Notes in Electrical Engineering, 170–80. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1405-6_22.

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Liu, Pu-guo. "Exploration and Research on Effective Fracturing Technology of Injection Well in Low Permeability Reservoir". En Springer Series in Geomechanics and Geoengineering, 1062–70. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0761-5_99.

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Galvan, Boris y Stephen Miller. "A Full GPU Simulation of Evolving Fracture Networks in a Heterogeneous Poro-Elasto-Plastic Medium with Effective-Stress-Dependent Permeability". En Lecture Notes in Earth System Sciences, 305–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-16405-7_20.

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Adebayo, Thomas y Marie Loridon. "Experimental Relationship Between Confining Pressure, Fluid Flowrates, Flow Time Period and Temperature on Effective Permeability to Water in High Porous Sandstone". En Advances in Petroleum Engineering and Petroleum Geochemistry, 29–31. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01578-7_7.

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Lee, Juhee y Jihee Kim. "Emerging Technologies in Scar Management: Laser-Assisted Delivery of Therapeutic Agents". En Textbook on Scar Management, 443–49. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44766-3_50.

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AbstractTopical application of medications is difficult through intact skin due to physiological barrier of stratum corneum. Effective transdermal drug delivery system can offer distinct advantages over the topical application and oral administration of drugs. Laser systems have showed clinical benefits for patients in various types of scars for decades. In particular, the advent of fractional resurfacing advanced laser has enhanced the scar treatments dramatically. A fractional laser irradiates cells with high precision by controlling the area and degree of ablation through laser settings. In addition to local thermal destruction and stimulation, fractionated devices may also play an important role in drug delivery through the skin. Preclinical studies substantiate enhanced drug accumulation for a variety of topically applied drugs after ablative fractional laser therapy. Laser-assisted drug delivery is an evolving technology with potentially broad clinical applications. Multiple studies demonstrate that laser pretreatment of the skin can increase the permeability and depth of penetration of topically applied drug molecules. We discuss the mechanisms of laser-assisted drug delivery for scar treatment to enhance our understanding of this evolving technology and suggest optimal protocols of treatment.

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Palacio-Castañeda, Valentina, Roland Brock y Wouter P. R. Verdurmen. "Generation of Protein-Phosphorodiamidate Morpholino Oligomer Conjugates for Efficient Cellular Delivery via Anthrax Protective Antigen". En Methods in Molecular Biology, 129–41. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2010-6_8.

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AbstractPhosphorodiamidate morpholino oligomers (PMOs) offer great promise as therapeutic agents for translation blocking or splice modulation due to their high stability and affinity for target sequences. However, in spite of their neutral charge as compared to natural oligonucleotides or phosphorothioate analogs, they still show little permeability for cellular membranes, highlighting the need for effective cytosolic delivery strategies. In addition, the implementation of strategies for efficient cellular targeting is highly desirable to minimize side effects and maximize the drug dose at its site of action. Anthrax toxin is a three-protein toxin of which the pore-forming protein anthrax protective antigen (PA) can be redirected to a receptor of choice and lethal factor (LF), one of the two substrate proteins, can be coupled to various cargoes for efficient cytosolic cargo delivery. In this protocol, we describe the steps to produce the proteins and protein conjugates required for cytosolic delivery of PMOs through the cation-selective pore generated by anthrax protective antigen. The method relies on the introduction of a unique cysteine at the C-terminal end of a truncated LF (aa 1–254), high-yield expression of the (truncated) toxin proteins in E. coli, functionalization of a PMO with a maleimide group and coupling of the maleimide-functionalized PMO to the unique cysteine on LF by maleimide-thiol conjugation chemistry. Through co-administration of PA with LF-PMO conjugates, an efficient cytosolic delivery of PMOs can be obtained.

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Sawada, Shun-ichi, Kazuaki Uemura, Minoru Nobumoto, Makoto Yoshida, Shigeru Sato, Yoshiaki Kageji, Yukio Tamari et al. "Analysis of Liquefaction During 2011 East Japan Earthquake – Part 2: Effective Stress Analysis Considering the Permeability of the Ground ~ Liquefaction at Reclaimed Land in the Main and After Shocks of the 2011 Great East Japan Earthquake". En Developments in Earthquake Geotechnics, 219–31. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62069-5_11.

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"effective permeability". En Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 457. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_50548.

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Actas de conferencias sobre el tema "Effective permeability"

Leung, K. Hong y Michael J. King. "The Effective Use of Effective Permeability". En Offshore Technology Conference. Offshore Technology Conference, 1999. http://dx.doi.org/10.4043/10784-ms.

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Saad, Naji, A. S. Cullick y M. M. Honarpour. "Effective Relative Permeability in Scale-Up and Simulation". En Low Permeability Reservoirs Symposium. Society of Petroleum Engineers, 1995. http://dx.doi.org/10.2118/29592-ms.

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Gdanski, G. D. "Fluid Properties and Particle Size Requirements for Effective Acid Fluid-Loss Control". En Low Permeability Reservoirs Symposium. Society of Petroleum Engineers, 1993. http://dx.doi.org/10.2118/25849-ms.

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Bushara, M. N., A. El Tawel, H. Borougha, C. Dabbouk y M. Qotb. "Effective Permeability Modeling: Geostatistical Integration of Permeability Indicators, OffshoreAbu Dhabi". En Abu Dhabi International Petroleum Exhibition and Conference. Society of Petroleum Engineers, 2002. http://dx.doi.org/10.2118/78583-ms.

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Journel, A. G., C. Deutsch y A. J. Desbarats. "Power Averaging for Block Effective Permeability". En SPE California Regional Meeting. Society of Petroleum Engineers, 1986. http://dx.doi.org/10.2118/15128-ms.

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J. Durlofsky, L. y E. Y. Chung. "Effective Permeability of Heterogeneous Reservoir Regions". En ECMOR II - 2nd European Conference on the Mathematics of Oil Recovery. European Association of Geoscientists & Engineers, 1990. http://dx.doi.org/10.3997/2214-4609.201411099.

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Holden, L., J. Høiberg y O. Lia. "An Estimator for the Effective Permeability". En ECMOR II - 2nd European Conference on the Mathematics of Oil Recovery. European Association of Geoscientists & Engineers, 1990. http://dx.doi.org/10.3997/2214-4609.201411125.

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Elphick, J. J., R. P. Marcinew y Barry Brady. "Effective Fracture Stimulation in High-Permeability Formations". En SPE Asia Pacific Oil and Gas Conference. Society of Petroleum Engineers, 1993. http://dx.doi.org/10.2118/25380-ms.

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Ngo, C. y F. Lai. "Effective permeability of a layered porous annulus". En 7th AIAA/ASME Joint Thermophysics and Heat Transfer Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1998. http://dx.doi.org/10.2514/6.1998-2676.

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Grimes, C. A. y D. M. Grimes. "The Effective Permeability Of Granular Thin Films". En 1993 Digests of International Magnetics Conference. IEEE, 1993. http://dx.doi.org/10.1109/intmag.1993.642197.

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Informes sobre el tema "Effective permeability"

Gelbard, Fred y Dallin Keesling. Effective Permeability of a Nuclear Fuel Assembly. Office of Scientific and Technical Information (OSTI), noviembre de 2021. http://dx.doi.org/10.2172/1832634.

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Um, Wooyong, Hun Bok Jung, Paul F. Martin y B. Peter McGrail. Effective Permeability Change in Wellbore Cement with Carbon Dioxide Reaction. Office of Scientific and Technical Information (OSTI), noviembre de 2011. http://dx.doi.org/10.2172/1029436.

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Dale E. Brown y Puja B. Kadolkar. Development of Cost-Effective Low-Permeability Ceramic and Refractory Components for Aluminum Melting and Casting. Office of Scientific and Technical Information (OSTI), diciembre de 2005. http://dx.doi.org/10.2172/878541.

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Kadolkar, Puja y Ronald D. Ott. Development of Cost-Effective Low-Permeability Ceramic and Refractory Components for Aluminum Melting and Casting. Office of Scientific and Technical Information (OSTI), febrero de 2006. http://dx.doi.org/10.2172/930713.

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Carey, James William. Probability Distributions for Effective Permeability of Potentially Leaking Wells at CO₂ Sequestration Sites. Office of Scientific and Technical Information (OSTI), mayo de 2018. http://dx.doi.org/10.2172/1438142.

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Deb, Robin, Paramita Mondal y Ardavan Ardeshirilajimi. Bridge Decks: Mitigation of Cracking and Increased Durability—Materials Solution (Phase III). Illinois Center for Transportation, diciembre de 2020. http://dx.doi.org/10.36501/0197-9191/20-023.

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Type K cement offers a lower slump than conventional concrete, even at a higher water-to-cement ratio. Therefore, a suitable chemical admixture should be added to the Type K concrete mix design at a feasible dosage to achieve and retain target slump. In this project, a compatibility study was performed for Type K concrete with commercially available water-reducing and air-entraining admixtures. Slump and air content losses were measured over a period of 60 minutes after mixing and a particular mid-range water-reducing admixture was found to retain slump effectively. Furthermore, no significant difference in admixture interaction between conventional and Type K concrete was observed. Another concern regarding the use of Type K concrete is that its higher water-to-cement ratio can potentially lead to higher permeability and durability issues. This study also explored the effectiveness of presoaked lightweight aggregates in providing extra water for Type K hydration without increasing the water-to-cement ratio. Permeability of concrete was measured to validate that the use of presoaked lightweight aggregates can lower water adsorption in Type K concrete, enhancing its durability. Extensive data analysis was performed to link the small-scale material test results with a structural test performed at Saint Louis University. A consistent relation was established in most cases, validating the effectiveness of both testing methods in understanding the performance of proposed shrinkage-mitigation strategies. Stress analysis was performed to rank the mitigation strategies. Type K incorporation is reported to be the most effective method for shrinkage-related crack mitigation among the mixes tested in this study. The second-best choice is the use of Type K in combination with either presoaked lightweight aggregates or shrinkage-reducing admixtures. All mitigation strategies tested in this work were proved to be significantly better than using no mitigation strategy.

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Miyamoto, Seiichi y Rami Keren. Improving Efficiency of Reclamation of Sodium-Affected Soils. United States Department of Agriculture, diciembre de 2000. http://dx.doi.org/10.32747/2000.7570569.bard.

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Sodium affected soils, along with salt-affected soils, are distributed widely in irrigated areas of the arid and semi-arid region of the world. Some of these soils can and must be reclaimed to meet the increasing demand for food, and existing irrigated lands must be managed to reduce salinization and alkalization associated with deteriorating irrigation water quality. This project was conducted for examining ways to reduce the use of chemical amendments and large quantities of leaching water for reclaiming sodic soils or for preventing soil sodification, We hypothesized that sodicity of calcareous soils irrigated with moderately sodic irrigation water can be controlled by maximizing dissolution of soil CaCO3. The work performed in Israel has shown that dissolution of CaCO3 can be enhanced by elevating the CO2 partial pressure in soils, and by increasing pore water velocity. The concentration of Ca in pore water was at an order of 1.5 mmolc L-1 at a CO2 partial pressure of 5 kPa, which is sufficient to maintain SAR below 4 at salinity of irrigation water of 0.5 dS m-1 or less. Incorporation of crop residue at a flesh weight of 100 Mg ha-1 reduced the exchangeable Na percentage from 19 to 5%, while it remained 14% without crop residue application These findings indicate a possibility of preventing soil sodification with appropriate crop rotation and residue management without chemical amendments, provided that soils remain permeable. In the case of highly sodic soils, dissolution of CaCO3 alone is usually insufficient to maintain soil permeability during initial leaching. We examined the effect of salinity and sodicity on water infiltration, then developed a way to estimate the amendments required on the basis of water infiltration and drainage characteristics, rather than the traditional idea of reducing the exchangeable Na percentage to a pre-fixed value. Initial indications from soil column and lysimeter study are that the proposed method provides realistic estimates of amendment requirements. We further hypothesized that cultivation of salt-tolerant plants with water of elevated salinity can enhance reclamation of severely Na-affected soils primarily through improved water infiltration and increased dissolution of CaCO3 through respiration. An outdoor lysimeter experiment using two saline sodic Entisols sodded with saltgrass for two seasons did not necessarily support this hypothesis. While there was an evidence of increased removal of the exchangeable Na originally present in the soils, the final salinity and sodicity measured were lowest without sod, and highest when sodded. High transpiration rates, coupled with low permeability and/or inadequate leaching seemed to have offset the potential benefits of increased CaCO3 dissolution and subsequent removal of exchangeable Na. Although vegetative means of reclaiming sodic soils had been reported to be effective in sandy soils with sufficient permeability, additional study is needed for its use in saline sodic soils under the high evaporative demand. The use of cool season grass after initial salt leaching with CaCl2 should be explored. Results obtained from this project have several potential applications, which include the use of crop residues for maintaining sodium balance, the use of CaCl2 for initial leaching of poorly permeable clayey sodic soils, and appraisal of sodicity effects, and appropriate rates and types of amendments required for reclamation

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Akinleye, Taiwo, Idil Deniz Akin, Amanda Hohner, Indranil Chowdhury, Richards Watts, Xianming Shi, Brendan Dutmer, James Mueller y Will Moody. Evaluation of Electrochemical Treatment for Removal of Arsenic and Manganese from Field Soil. Illinois Center for Transportation, junio de 2021. http://dx.doi.org/10.36501/0197-9191/21-019.

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Soils containing inorganic compounds are frequently encountered by transportation agencies during construction within the right-of-way, and they pose a threat to human health and the environment. As a result, construction activities may experience project delays and increased costs associated with management of inorganic compounds containing soils required to meet environmental regulations. Recalcitrance of metal-contaminated soils toward conventional treatment technologies is exacerbated in clay or organic content-rich fine-grained soils with low permeability and high sorption capacity because of increased treatment complexity, cost, and duration. The objective of this study was to develop an accelerated in situ electrochemical treatment approach to extract inorganic compounds from fine-grained soils, with the treatment time comparable to excavation and off-site disposal. Three reactor experiments were conducted on samples collected from two borehole locations from a field site in Illinois that contained arsenic (As)(~7.4 mg/kg) and manganese (Mn)(~700 mg/kg). A combination of hydrogen peroxide (H2O2) and/or citrate buffer solution was used to treat the soils. A low-intensity electrical field was applied to soil samples using a bench-scale reactor that resembles field-scale in situ electrochemical systems. For the treatment using 10% H2O2 and citrate buffer solution, average removal of 23% and 8% were achieved for Mn and As, respectively. With 4% H2O2 and citrate buffer, 39% and 24% removal were achieved for Mn and As; while using only citrate buffer as the electrolyte, 49% and 9% removal were achieved for Mn and As, respectively. All chemical regimes adopted in this study reduced the inorganic compound concentrations to below the maximum allowable concentration for Illinois as specified by the Illinois Environmental Protection Agency. The results from this work indicate that electrochemical systems that leverage low concentrations of hydrogen peroxide and citrate buffer can be effective for remediating soils containing manganese and arsenic.

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Poverenov, Elena, Tara McHugh y Victor Rodov. Waste to Worth: Active antimicrobial and health-beneficial food coating from byproducts of mushroom industry. United States Department of Agriculture, enero de 2014. http://dx.doi.org/10.32747/2014.7600015.bard.

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Background. In this proposal we suggest developing a common solution for three seemingly unrelated acute problems: (1) improving sustainability of fast-growing mushroom industry producing worldwide millions of tons of underutilized leftovers; (2) alleviating the epidemic of vitamin D deficiency adversely affecting the public health in both countries and in other regions; (3) reducing spoilage of perishable fruit and vegetable products leading to food wastage. Based on our previous experience we propose utilizing appropriately processed mushroom byproducts as a source of two valuable bioactive materials: antimicrobial and wholesome polysaccharide chitosan and health-strengthening nutrient ergocalciferol⁽ᵛⁱᵗᵃᵐⁱⁿ ᴰ2⁾. ᴬᵈᵈⁱᵗⁱᵒⁿᵃˡ ᵇᵉⁿᵉᶠⁱᵗ ᵒᶠ ᵗʰᵉˢᵉ ᵐᵃᵗᵉʳⁱᵃˡˢ ⁱˢ ᵗʰᵉⁱʳ ᵒʳⁱᵍⁱⁿ ᶠʳᵒᵐ ⁿᵒⁿ⁻ᵃⁿⁱᵐᵃˡ ᶠᵒᵒᵈ⁻ᵍʳᵃᵈᵉ source. We proposed using chitosan and vitamin D as ingredients in active edible coatings on two model foods: highly perishable fresh-cut melon and less perishable health bars. Objectives and work program. The general aim of the project is improving storability, safety and health value of foods by developing and applying a novel active edible coating based on utilization of mushroom industry leftovers. The work plan includes the following tasks: (a) optimizing the UV-B treatment of mushroom leftover stalks to enrich them with vitamin D without compromising chitosan quality - Done; (b) developing effective extraction procedures to yield chitosan and vitamin D from the stalks - Done; (c) utilizing LbL approach to prepare fungal chitosan-based edible coatings with optimal properties - Done; (d) enrichment of the coating matrix with fungal vitamin D utilizing molecular encapsulation and nano-encapsulation approaches - Done, it was found that no encapsulation methods are needed to enrich chitosan matrix with vitamin D; (e) testing the performance of the coating for controlling spoilage of fresh cut melons - Done; (f) testing the performance of the coating for nutritional enhancement and quality preservation of heath bars - Done. Achievements. In this study numerous results were achieved. Mushroom waste, leftover stalks, was treated ʷⁱᵗʰ ᵁⱽ⁻ᴮ ˡⁱᵍʰᵗ ᵃⁿᵈ ᵗʳᵉᵃᵗᵐᵉⁿᵗ ⁱⁿᵈᵘᶜᵉˢ ᵃ ᵛᵉʳʸ ʰⁱᵍʰ ᵃᶜᶜᵘᵐᵘˡᵃᵗⁱᵒⁿ ᵒᶠ ᵛⁱᵗᵃᵐⁱⁿ ᴰ2, ᶠᵃʳ ᵉˣᶜᵉᵉᵈⁱⁿᵍ any other dietary vitamin D source. The straightforward vitamin D extraction procedure and ᵃ ˢⁱᵐᵖˡⁱᶠⁱᵉᵈ ᵃⁿᵃˡʸᵗⁱᶜᵃˡ ᵖʳᵒᵗᵒᶜᵒˡ ᶠᵒʳ ᵗⁱᵐᵉ⁻ᵉᶠᶠⁱᶜⁱᵉⁿᵗ ᵈᵉᵗᵉʳᵐⁱⁿᵃᵗⁱᵒⁿ ᵒᶠ ᵗʰᵉ ᵛⁱᵗᵃᵐⁱⁿ ᴰ2 ᶜᵒⁿᵗᵉⁿᵗ suitable for routine product quality control were developed. Concerning the fungal chitosan extraction, new freeze-thawing protocol was developed, tested on three different mushroom sources and compared to the classic protocol. The new protocol resulted in up to 2-fold increase in the obtained chitosan yield, up to 3-fold increase in its deacetylation degree, high whitening index and good antimicrobial activity. The fungal chitosan films enriched with Vitamin D were prepared and compared to the films based on animal origin chitosan demonstrating similar density, porosity and water vapor permeability. Layer-by-layer chitosan-alginate electrostatic deposition was used to coat fruit bars. The coatings helped to preserve the quality and increase the shelf-life of fruit bars, delaying degradation of ascorbic acid and antioxidant capacity loss as well as reducing bar softening. Microbiological analyses also showed a delay in yeast and fungal growth when compared with single layer coatings of fungal or animal chitosan or alginate. Edible coatings were also applied on fresh-cut melons and provided significant improvement of physiological quality (firmness, weight ˡᵒˢˢ⁾, ᵐⁱᶜʳᵒᵇⁱᵃˡ ˢᵃᶠᵉᵗʸ ⁽ᵇᵃᶜᵗᵉʳⁱᵃ, ᵐᵒˡᵈ, ʸᵉᵃˢᵗ⁾, ⁿᵒʳᵐᵃˡ ʳᵉˢᵖⁱʳᵃᵗⁱᵒⁿ ᵖʳᵒᶜᵉˢˢ ⁽Cᴼ2, ᴼ²⁾ ᵃⁿᵈ ᵈⁱᵈ not cause off-flavor (EtOH). It was also found that the performance of edible coating from fungal stalk leftovers does not concede to the chitosan coatings sourced from animal or good quality mushrooms. Implications. The proposal helped attaining triple benefit: valorization of mushroom industry byproducts; improving public health by fortification of food products with vitamin D from natural non-animal source; and reducing food wastage by using shelf- life-extending antimicrobial edible coatings. New observations with scientific impact were found. The program resulted in 5 research papers. Several effective and straightforward procedures that can be adopted by mushroom growers and food industries were developed. BARD Report - Project 4784

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Pelletier, Austin, Amanda Hohner, Idil Deniz Akin, Indranil Chowdhury, Richard Watts, Xianming Shi, Brendan Dutmer y James Mueller. Bench-scale Electrochemical Treatment of Co-contaminated Clayey Soil. Illinois Center for Transportation, junio de 2021. http://dx.doi.org/10.36501/0197-9191/21-018.

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Industrial soil contamination is frequently unearthed by transportation agencies during construction within the right-of-way. As a result, transportation agencies may experience construction delays. Soils co-contaminated with high-molecular-weight polycyclic aromatic hydrocarbons (HMW-PAHs) and metals are commonly encountered in Illinois and exhibit recalcitrance towards conventional treatment technologies. This issue is exacerbated in the fine-grained soils common to Illinois, where low-permeability and immense sorption capacity increase treatment complexity, cost, and duration. Contaminated sites are spatially and temporally restrictive and require rapid in situ treatments, whereas conventional soil remediation requires 1 to 3 years on average. Consequently, transportation agencies typically pursue excavation and off-site disposal for expediency. However, this solution is expensive, so a comparatively expeditious and affordable treatment alternative is needed to combat the increasing cost of hazardous waste disposal. The objective of this work was to develop an accelerated in situ treatment approach adaptable for use at any construction site to cost-effectively remove HMW-PAHs and metals from clayey soil. It was hypothesized that an in situ electrochemical treatment which augments electrokinetics with H2O2 could remediate both HMW-PAHs and metals in less than a month. Bench-scale reactors resemblant of field-scale in situ electrokinetic systems were designed and fabricated to assess the electrochemical treatment of clayey soils contaminated with HMW-PAHs and metals. Pyrene, chromium, and manganese were used as model contaminants, spiked into kaolinite as a model clay. Electrokinetics were imposed by a low-intensity electrical field distributed by graphite rods. Electrolytic H2O2 systems were leveraged to distribute electrical current and facilitate contaminant removal. Average contaminant removals of 100%, 42.3%, and 4.5% were achieved for pyrene, manganese, and chromium, respectively. Successful development of this bench-scale treatment approach will serve to guide transportation agencies in field-scale implementation. The results from this work signify that electrochemical systems that leverage eco-friendly oxidant addition can replace excavation and disposal as a means of addressing clayey soils co-contaminated with HMW-PAHs and metals.

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