Relevant bibliographies by topics / In-situ electrokinetics

Academic literature on the topic 'In-situ electrokinetics'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'In-situ electrokinetics.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "In-situ electrokinetics"

1

Lukman, Salihu, Mohammed Hussain Essa, Nuhu Dalhat Mu'azu, and Alaadin Bukhari. "Coupled Electrokinetics-Adsorption Technique for Simultaneous Removal of Heavy Metals and Organics from Saline-Sodic Soil." Scientific World Journal 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/346910.

Full text
Abstract:
In situ remediation technologies for contaminated soils are faced with significant technical challenges when the contaminated soil has low permeability. Popular traditional technologies are rendered ineffective due to the difficulty encountered in accessing the contaminants as well as when employed in settings where the soil contains mixed contaminants such as petroleum hydrocarbons, heavy metals, and polar organics. In this study, an integrated in situ remediation technique that couples electrokinetics with adsorption, using locally produced granular activated carbon from date palm pits in the treatment zones that are installed directly to bracket the contaminated soils at bench-scale, is investigated. Natural saline-sodic soil, spiked with contaminant mixture (kerosene, phenol, Cr, Cd, Cu, Zn, Pb, and Hg), was used in this study to investigate the efficiency of contaminant removal. For the 21-day period of continuous electrokinetics-adsorption experimental run, efficiency for the removal of Zn, Pb, Cu, Cd, Cr, Hg, phenol, and kerosene was found to reach 26.8, 55.8, 41.0, 34.4, 75.9, 92.49, 100.0, and 49.8%, respectively. The results obtained suggest that integrating adsorption into electrokinetic technology is a promising solution for removal of contaminant mixture from saline-sodic soils.
APA, Harvard, Vancouver, ISO, and other styles
2

Mohamedelhassan, E., and J. Q. Shang. "Electrokinetics-generated pore fluid and ionic transport in an offshore calcareous soil." Canadian Geotechnical Journal 40, no. 6 (December 1, 2003): 1185–99. http://dx.doi.org/10.1139/t03-060.

Full text
Abstract:
In this study, the electrokinetics-generated pore fluid transport in an offshore calcareous soil is investigated in three steps. The pore fluid of the soil specimen tested has a salinity equivalent to that of seawater (artificial or A-seawater). The electroosmotic flow rates are measured for the A-seawater and two stabilizing permeating solutions, i.e., 15% CaCl2 and 10% Al2(SO4)3·18H2O solutions. The results show that electroosmosis generated significant flow in the soil and can effectively transport the two permeating solutions through soil pores filled with A-seawater. The maximum flow rate is observed in the test conducted with 15% CaCl2 solution, followed by those of A-seawater and 10% Al2(SO4)3·18H2O solutions, respectively. The results also show the significant role of electromigration in transporting the cations in the permeating solutions from the anode to the cathode. In particular, it is found that the electrokinetics-generated ionic transport for calcium (Ca2+) is 6.3 times faster than that for aluminum (Al3+). The surface charge properties of the calcareous soil are studied by measuring the zeta potentials of the soil solids suspended in electrolyte solutions of various types, concentrations, and pH values. The relationship between the experimental and theoretical coefficients of electroosmotic permeability, ke, is examined based on the results from the electrokinetic experiments and the Helmholtz–Smoluchowski model. It is concluded that the effectiveness of electroosmosis in transporting water can be predicted qualitatively or semiquantitatively from the zeta potential of the soil solids suspension. The influence of pore fluid pH on the zeta potential of the soil is also investigated. The study provides important information for the use of electrokinetics to facilitate in situ artificial cementation of calcareous soils for offshore foundation applications.Key words: calcareous soil, electrokinetics, electroosmosis, electromigration, zeta potential, soil–water–electrolyte system.
APA, Harvard, Vancouver, ISO, and other styles
3

Li, Shanshan, Yukun Ren, Haochen Cui, Quan Yuan, Jie Wu, Shigetoshi Eda, and Hongyuan Jiang. "Alternating current electrokinetics enhanced in situ capacitive immunoassay." ELECTROPHORESIS 36, no. 3 (November 29, 2014): 471–74. http://dx.doi.org/10.1002/elps.201400284.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Safdar, Muhammad Umair, Maria Mavroulidou, Michael J. Gunn, Christopher Gray, Diane Purchase, Jonathan Garelick, and Ian Payne. "Implementation of biocementation for a partially saturated problematic soil of the UK railway network." E3S Web of Conferences 195 (2020): 05006. http://dx.doi.org/10.1051/e3sconf/202019505006.

Full text
Abstract:
This paper refers to biocementation of a problematic soil of the UK railway network as a potential stabilisation technique of this soil using indigenous ureolytic bacteria. The soil is peat, a soft foundation soil also subject to oxidation wastage. As the peat is under existing embankments, electrokinetics (EK) is proposed as a promising technique to implement treatments. In the context of unsaturated soils the paper thus focuses on two particular aspects relevant for the implementation of treatments and the stability of this soil, namely: a) the effect of degree of saturation of the peat on the bio-electrokinetic treatment ; b) the soil water retention curve of the soil affecting flow and transport; these are relevant as we focus on understanding and modelling the implementation of treatments through electrokinetics; moreover for the peat it is of importance to understand moisture exchange in the vadose zone and control groundwater table levels (e.g. during electrokinetics) in order to prevent further oxidation. After isolation and screening of indigenous microorgansisms Bacillus licheniformis was selected for further testing. The results in terms of unconfined compressive strength, CaCO3 content, swelling and compression behaviour and water retention proved the feasibility of biocementation using this indigenous microorganism. Ongoing work is assessing the required treated soil characteristics and related required biocementation degree to solve UK rail's peat foundation problems. Upscaling of the techniques towards in situ implementation is also planned in the next stage of the research.
APA, Harvard, Vancouver, ISO, and other styles
5

Chew, Chin F., and Tian C. Zhang. "In-situ remediation of nitrate-contaminated ground water by electrokinetics/iron wall processes." Water Science and Technology 38, no. 7 (October 1, 1998): 135–42. http://dx.doi.org/10.2166/wst.1998.0286.

Full text
Abstract:
The feasibility of using electrokinetics coupled with a zero valent iron (Fe0) treatment wall to abiotically remediate nitrate-contaminated soils was investigated. Upon completion of each test run, the contaminated soil specimen was sliced into five parts and analyzed for nitrate-nitrogen, ammonia-nitrogen and nitrite-nitrogen. Nitrogen mass balance was used to determine the major transformation products. In control experiments where only electrokinetics was used at various constant voltages, 25 to 37% of the nitrate-nitrogen was transformed. The amount of nitrate-nitrogen transformed improved when a Fe0 wall (20 g or about 8-10% by weight) was placed near the anode. For test runs at various constant voltages, the amount of nitrate-nitrogen transformed ranged from 54 to 87%. By switching to constant currents, the amount of nitrate-nitrogen - transformed was about 84 to 88%. The major transformation products were ammonia-nitrogen and nitrogen gases. Nitrite-nitrogen was less than 1% in all experimental runs. Two localized pH conditions exist in the system, a low pH region near the anode and a high pH region near the cathode. Placing of an iron wall near the anode increases the pH in that area as time increases. Movement of the acid front did not flush across the cathode. This research has demonstrated that the electrokinetics/iron wall process can be used to remediate nitrate-contaminated groundwater.
APA, Harvard, Vancouver, ISO, and other styles
6

Choi, Eunpyo, Kilsung Kwon, Daejoong Kim, and Jungyul Park. "An electrokinetic study on tunable 3D nanochannel networks constructed by spatially controlled nanoparticle assembly." Lab on a Chip 15, no. 2 (2015): 512–23. http://dx.doi.org/10.1039/c4lc00949e.

Full text
Abstract:
We present a thorough experimental and theoretical analysis of nanoscale electrokinetics using ion-selective nanochannel networks formed by geometrically controlled in situ self-assembled nanoparticles.
APA, Harvard, Vancouver, ISO, and other styles
7

Ahualli, Silvia, Sara Bermúdez, Félix Carrique, María L. Jiménez, and Ángel V. Delgado. "AC Electrokinetics of Salt-Free Multilayered Polymer-Grafted Particles." Polymers 12, no. 9 (September 15, 2020): 2097. http://dx.doi.org/10.3390/polym12092097.

Full text
Abstract:
Interest in the electrical properties of the interface between soft (or polymer-grafted) nanoparticles and solutions is considerable. Of particular significance is the case of polyelectrolyte-coated particles, mainly taking into account that the layer-by-layer procedure allows the control of the thickness and permeability of the layer, and the overall charge of the coated particle. Like in simpler systems, electrokinetic determinations in AC fields (including dielectric dispersion in the 1 kHz–1 MHz frequency range and dynamic electrophoresis by electroacoustic methods in the 1–18 MHz range) provide a large amount of information about the physics of the interface. Different models have dealt with the electrokinetics of particles coated by a single polymer layer, but studies regarding multi-layered particles are far scarcer. This is even more significant in the case of so-called salt-free systems; ideally, the only charges existing in this case consist of the charge in the layer(s) and the core particle itself, and their corresponding countercharges, with no other ions added. The aims of this paper are as follows: (i) the elaboration of a model for the evaluation of the electrokinetics of multi-grafted polymer particles in the presence of alternating electric fields, in dispersion media where no salts are added; (ii) to carry out an experimental evaluation of the frequency dependence of the dynamic (or AC) electrophoretic mobility and the dielectric permittivity of suspensions of polystyrene latex spherical particles coated with successive layers of cationic, anionic, and neutral polymers; and (iii) finally, to perform a comparison between predictions and experimental results, so that it can be demonstrated that the electrokinetic analysis is a useful tool for the in situ characterization of multilayered particles.
APA, Harvard, Vancouver, ISO, and other styles
8

Larsen, Mads S., Murat N. Yesibolati, and Kristian S. Mølhave. "In-situ Electrokinetics Using Liquid Phase Transmission Electron Microscopy." Microscopy and Microanalysis 28, S1 (July 22, 2022): 1908–10. http://dx.doi.org/10.1017/s1431927622007474.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Larsen, Mads S., Murat N. Yesibolati, and Kristian S. Mølhave. "In-situ Electrokinetics Using Liquid Phase Transmission Electron Microscopy." Microscopy and Microanalysis 27, S2 (November 2021): 95–96. http://dx.doi.org/10.1017/s1431927621013477.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Yeung, Albert T., and Subbaraju Datla. "Fundamental formulation of electrokinetic extraction of contaminants from soil." Canadian Geotechnical Journal 32, no. 4 (August 1, 1995): 569–83. http://dx.doi.org/10.1139/t95-060.

Full text
Abstract:
Electro-osmosis and ionic migration are the basic cleanup mechanisms in the electrokinetic extraction of contaminants from fine-grained soils. These are coupled flows as the flows of fluid and contaminants are driven by an externally applied electrical gradient. Moreover, other electrochemical reactions will occur simultaneously during the process. The most pronounced effect is the generation of pH gradient in the soil. The change of pH in the pore fluid can have a significant impact on the degree of sorption and desorption of chemicals on soil particle surfaces, complexes formation and precipitation of chemical species, and dissociation of organic acids; thus affecting the feasibility and efficiency of the cleanup technique tremendously. An attempt is made to formulate the coupled flows of ionic contaminants and the resulting change of pH in the pore fluid during the electrokinetic extraction process. The coupled flows of contaminants are formulated by the formalism of nonequilibrium thermodynamics. The pH is determined as a function of time and space by maintaining electrical neutrality throughout the system all the times. A numerical model NEUTRAL is developed to simulate the processes. The good agreement between computed and experimental results published in the literature indicates that the approach is a valid step toward a better understanding of the physics and chemistry involved during electrokinetic treatment of contaminated soils. Key words : electrokinetics, in situ remediation, contaminated soil, coupled flows, electrochemistry, nonequilibrium thermodynamics.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "In-situ electrokinetics"

1

Boeva, Valentina. "Distribution of ammonium nitrate as nitrogen-containing nutrient for in situ biodegradation by means of electrokinetics." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1995. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ44874.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Loulergue, Patrick. "Caractérisation In-Situ de dépôts formés en filtration membranaire de suspensions particulaires et de biofluides : intéraction entre structure locale et performances du procédé." Thesis, Toulouse, INSA, 2012. http://www.theses.fr/2012ISAT0046/document.

Full text
Abstract:
Le colmatage membranaire demeure l’un des verrous majeurs des bioréacteurs à membrane (BAM). Ces travaux visent à apporter une contribution à la compréhension de la dynamique de structuration de dépôts complexes formés lors de la filtration frontale de (bio)fluides et son impact sur les performances de filtration. Pour cela, différents outils permettant la mesure in-situ des propriétés structurelles locales des dépôts ont été utilisés de manière à pouvoir relier ces propriétés aux performances globales de filtration. Les propriétés électrocinétiques des dépôts ont également été étudiées. Deux méthodes, l’une optique et l’autre acoustique, ont été utilisées pour caractériser les propriétés structurelles locales des dépôts (épaisseur, cinétique de croissance). Dans un premier temps, les épaisseurs obtenues par les méthodes optiques et acoustiques ont été comparées. Il a été montré que, dans le cas de dépôts peu poreux, les deux méthodes conduisent aux mêmes épaisseurs de dépôts. Dans le cas de dépôts plus poreux, ces deux méthodes permettent l’obtention de données complémentaires à deux niveaux de profondeur différents au sein du dépôt. L’influence des conditions opératoires sur la structuration de dépôts de particules modèles a ensuite été étudiée. Grâce à la méthode optique il a été montré que, quelles que soient les conditions opératoires, il existe une variation temporelle des propriétés du dépôt. De plus, une répartition non homogène du dépôt à la surface de la membrane peut également exister, favorisée par de faibles répulsions entre particules. Enfin, l’applicabilité des différentes méthodes au cas des biofluides issus de BAM a été évaluée. La structure de dépôts complexes constitués lors de la filtration de ces biofluides a ensuite été étudiée. La compressibilité des dépôts, mise en évidence à l’échelle globale par suivi des performances de filtration, a également été observée à l’échelle locale : l’épaisseur du dépôt décroît avec une augmentation de la PTM. De plus, à l’échelle locale, une variabilité spatiale des propriétés du dépôt a été mise en évidence. Afin de contrôler la compressibilité des dépôts l’impact de l’ajout de particules au sein du biofluide a été évalué
Membrane fouling is one of the major drawbacks of membrane bioreactors. This study is thus a contribution to the understanding of the dynamic structuring of complex deposits build-up during dead-end filtration of complex biofluids. Several tools were used to perform in-situ characterization of cake layer structural properties at local scale and to link them to global filtration performances. The electrokinetics properties of the deposit were also investigated. An optical and an acoustic method were used to measure local cake thickness and growth kinetics. The thicknesses given by the two methods were first compared. It was shown that for compact deposits the two different methods lead to the same thickness of the deposit. For more porous deposits, these two methods allow to obtain complementary data at two different depths of the deposits. The influence of operating conditions on cake layer structuring during filtration of modelled particles was evaluated. Using the optical method it was shown that, whatever the operating conditions, the cake structure is not constant in time. Furthermore, a spatial variability of the cake layer thickness might exist especially in the case of weak particle-particle repulsion. Finally, it has been investigated whether the different methods could be applied or not to the case of biofluid filtration. The structural properties of the complex deposits built up during diluted activated sludge filtration were investigated. Cake compressibility was observed at global scale by a monitoring of process performances and was also observed at local scale: cake thickness decreases as TMP increases. Furthermore, at local scale, a spatial variability of deposit structure was found. Particle addition into the biofluid was assessed in order to mitigate compressibility effects
APA, Harvard, Vancouver, ISO, and other styles
3

Sin, Lai Yi Mandy. "IN SITU ELECTROKINETIC SAMPLE PREPARATION FOR SELF-ASSEMBLED MONOLAYER BASED ELECTROCHEMICAL BIOSENSING." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/205176.

Full text
Abstract:
Electrokinetics based microfluidic systems are potentially promising for lab-on-a-chip applications due to their effectiveness in manipulating nanoscale and biological objects, label-free operation, simple fabrication processes, small voltage requirements, and most importantly simple system integration strategy. Among various electrokinetics techniques, AC electrothermal flow (ACEF) is the most promising technique in microfluidic manipulation toward biomedical applications due to its effectiveness in high conductivity biological and physiological fluids. As relatively little is known about the ACEF induced fluid motion at highly conductive samples, the characteristics of electrothermal manipulation of fluid samples with different conductivities were investigated systematically. For low conductivity sample (below 1 S/m), the characteristics of the electrothermal fluid motion was in quantitative agreement with the theory. For high conductivity samples (greater than 1 S/m), the fluid motion appeared to deviate from the model as a result of electrochemical reactions and the temperature effect. Here, a universal electrode approach which directly implements ACEF-induced sample preparation on a SAM based electrochemical sensor for point-of-care diagnostics of urinary tract infections has also been demonstrated. Using uropathogenic E. coli clinical isolates as model systems, we demonstrate that "on-chip" ACEF-induced sample preparation can improve the sensor performance without complicated system integration strategy and presents a pathway for implementing truly lab on a chip, instead of chip in a lab. Finally an integrated chip approach has been proposed for transforming electrochemical sensing system from laboratory research into point-of-care diagnostics with multiple microelectrodes.
APA, Harvard, Vancouver, ISO, and other styles
4

Yang, Kai. "In Situ Preconcentration by AC Electrokinetics for Rapid and Sensitive Nanoparticle Detection." 2011. http://trace.tennessee.edu/utk_graddiss/1146.

Full text
Abstract:
Reducing cost and time is a major concern in clinical diagnostics. Current molecular diagnostics are multi-step processes that usually take at least several hours or even days to complete multiple reagents delivery, incubations and several washing processes. This highly labor-intensive work and lack of automation could result in reduced reliability and low efficiency. The Laboratory-on-a-chip (LOC), taking advantage of the merger and development of microfluidics and biosensor technology, has shown promise towards a solution for performing analytical tests in a self-contained and compact unit, enabling earlier and decentralized testing. However, challenges are to integrate the fluid regulatory elements on a single platform and to detect target analytes with high sensitivity and selectivity. The goal of this research work is to develop an AC electrokinetic (ACEK) flow through concentrator for in-situ concentration of biomolecules and develop a comprehensive understanding of effects of ACEK flow on the biomolecule transport (in-situ concentration) and their impact on electronic biosensing mechanism and performance, achieving automation and miniaturization. ACEK is a new and promising technique to manipulate micro/bio-fluids and particles. It has many advantages over other techniques for its low applied voltage, portability and compatibility for integration into lab-on-a-chip devices. Numerical study on preconcentration system design in this work has provided an optimization rule for various biosensor designs using ACEK technique. And the microfluidic immunoassay lab-chip designed based on ACET effect has showed promising prospect for accelerated diagnostics. With optimized design of channel geometry, electrode patterns, and properly selected operation condition (ac frequency and voltage), the preconcentration system greatly reduced the reaction time to several minutes instead of several hours, and improved sensitivity of the assay. With the design of immunoassay lab-chip, one can quantitatively study the effect of ACET micropumping and mixing on molecular level binding. Improved sensors with single-chip form factor as a general platform could have a significant impact on a wide-range of biochemical detection and disease diagnostics including pathogen/virus detection, whole blood analysis, immune-screening, gene expression, as well as home land security.
APA, Harvard, Vancouver, ISO, and other styles
5

Shen, Po-Cheng, and 沈柏丞. "Study On In-Situ Treatment of Lead Contaminated Soils by The Pilot-scale Electrokinetics." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/24072067069012152120.

Full text
Abstract:
碩士
朝陽科技大學
環境工程與管理系碩士班
100
The purpose of this study is to discuss the removal efficiency of heavy metal pollutants in the soil and economic cost by the in-situ pilot-scale electrokinetics. First, it will proceed the removal efficiency experiment of lead form the in-situ soil by the small pilot-scale electrokinetics in laboratory. It is to understand the electrochemical phenomenons of the electro-osmosis flow, ion migration and electrolysis effectiveness etc. Second, it will proceed the in-situ experiment in taichung and nantou that the operating parameters include: system electrolyte (0.01M EDTA-2Na, 0.01M Na2CO3), electrode material (Anode: graphite plate, Cathode: stainless steel plate), the voltage gradient, constant current and constant voltage are 1 V cm-1, 10A and 80V, respectively. In the remediation process, it will be analysis and monitoring that (1) the pH and conductivity values and lead concentration of the system electrolyte, (2) the pH and conductivity values and lead concentration of the soil, (3) current, voltage, temperature and fertility test (Ca、Mg、K、Na、F、Mn、Cu、Zn、P、OM、CEC). All of them to understand the removal efficiency of lead in the in-situ soil by electrokinetics and to count the power consumption costs. Form the experimental results show, passed through 56 days treatment, the mean concentration of lead in the soil was from 7190 mg Kg-1 to 2050 mg Kg-1 in wuri site. The removal efficiency is around 72%. In nantou site, the mean concentration of lead in the soil was from 7246 mg Kg-1 to 6647 mg Kg-1 that removal efficiency about 10% by 14 days treatment. In addition, the soil not happened the acidification in the electrokinetics with the 0.01M Na2CO3 and 0.01M EDTA operated. In the aspect of tlhe operating costs that example of the wuri site. The 1% removal efficiency of lead per 1.0 m2 is around NT. 8.82 dollars. It needs NT. 12.6 dollars to remove 100 mg Kg-1 Pb.
APA, Harvard, Vancouver, ISO, and other styles
6

Lai, Yung-Chang, and 賴詠章. "Investigation of effectiveness and factors on in-situ electrokinetics (CEEK) for treating pb contaminated soils." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/33640120486544987889.

Full text
Abstract:
碩士
朝陽科技大學
環境工程與管理系碩士班
101
This study is to investigate the critical effects about circulation-enhanced electrokinetics (CEEK) in near-real scale to remediate the Pb contaminated soils in Nantou city. Through this study, the lead removal efficiency and cost effectiveness of CEEK in near-real scale can be obtained. The experimental parameters were controlled as: operation solution (0.01 M EDTA-2Na, 0.01 M Na2CO3); electrode (anode: graphite, cathode: stainless steel); voltage gradient 1 V cm-1. After 63-day CEEK treatment, the Pb removal efficiency was around 64% and the average Pb concentration was decreased from 7,246 mg/Kg down to 2,612 mg/Kg. The operational cost of electricity of removing 1% lead was around 9.84 NT dollars based on one square meters of polluted soil. This result is similar to our previous study in pilot scale (8.82 NT dollars). Under CEEK operation in near-real scale, the pH and conductivity of the treated soils was maintained at neutral and stable situation, respectively. In addition, the current, voltage, and temperature of CEEK system could be controlled at the stable status as well. The fertilization of the CEEK treated soil was slightly decreased. The fertilizer with Ca and P should be added in the CEEK treated soils.
APA, Harvard, Vancouver, ISO, and other styles
7

Hsueh, Wei Chen, and 薛威震. "A Study on In-situ Treatment of Pb/Cu Contaminated Soils by Electrokinetics and a Reactive Wall of Cation Exchange Resin." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/90833627768180797350.

Full text
Abstract:
碩士
國立中山大學
環境工程研究所
87
In order to increase the in-situ remediation efficiency of the contaminated soils by electrokinetics, this study combines the electrokinetic remediation technology and the reactive wall of cation exchange resin and changes the cathode reservoir solution every 5 or 10 days. Experimental results have shown that this soil treatment technology is capable of increasing the remediation efficiency of the heavy metals Cu and Pb up to 86.54% and 61.12%. After the soil remediation, the cation exchange resin could be regenerated and reused. In so doing, nearly 80% Cu and 50% Pb caught by the resin could be recovered. The following experimental factors are studied to determine their effects on the remediation efficiency: (1)soil type, (2)the kind of cathode and anode reservoir solutions, (3)the frequency of changing cathode reservoir solution, (4)the frequency of changing the reactive wall of the cation exchange resin, and(5)the initial concentration of Cu or Pb. The experimental data obtained are analyzed statistically to determine the contribution of each factor. For Cu removal, the kind of the reservoir solution is the most influencing factor, and the frequency of changing reservoir solution is the second. For Pb removal, no significant factor can be fond. Accordingly, under appropriate operating conditions, the new treatment train technology used in this study could effectively enhance the remediation efficiency by electrokinetics alone.
APA, Harvard, Vancouver, ISO, and other styles
8

Chyi-Yech, Liu, and 劉奇岳. "A Study on Optimal Operating Conditions for In-Situ Treatment of TCE and 4-CP Contaminated Soils by Electrokinetics-Fenton Process." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/28259693647956276582.

Full text
Abstract:
碩士
國立中山大學
環境工程研究所
87
This research was to determine the optimal operating conditions for in-situ treatment of trichloroethylene and 4-chlorophenol contaminated soils by electrokinetics-Fenton process. An electric gradient of 1 V/cm, deionized water in the cathode reservoir, and a reaction time of ten days were employed in all experiments. Soil types (No. 1 and No. 2), contaminant kinds (trichloroethylene and 4-chlorophenol), catalyst types (iron powder and FeSO4), catalyst dosage and position (one layer of 1.5 g iron powder placed in the soil column at a distance of 5 cm from the anode reservoir and two layer of iron powder placed in the soil column one at a distance of 5 cm from the anode reservoir and the other next to the cathode reservoir), and electrode types (graphite and stainless steel) were employed as the experimental factors in this study. In this study, treating the soil with a higher electrical conductivity would consume more H2O2 because H2O2 electrolyzed in the anode reservoir; whereas treating the soil with a higher organic content would lower the treatment efficiency because of the adsorption of contaminants and the consumption of hydroxyl radicals by the organic matter of soil. The directions of all electroosmotic flows were found to be from anode toward cathode in this investigation. Experimental results showed that the type of catalyst and its dosage affected the reaction mechanisms (i.e., "destruction" and "removal") and the treatment efficiency. For iron powder of a smaller size, the overall destruction and removal efficiency (DRE) was lower, but the percent of destruction was higher. For iron powder of a higher dosage, the DRE was lower, but the percent of destruction was higher. When trichloro-ethylene was the target pollutant, the highest destruction and removal efficiency (i.e., 88.91%) for Soil No. 1 was obtained by adding 1.5g of UPF-030 iron powder; whereas the highest destruction efficiency (i.e., 59.41%) was obtained by adding two layers of 1.5g scrap iron powder. However the highest removal efficiency (i.e., 63.64%) was obtained for Soil No. 1 by using 0.0196 M FeSO4 as the catalyst. When 4-Chlorophenol was the target pollutant, adding 1.5g of UPF-030 iron powder would yield the highest destruction and removal efficiency (i.e., 88.91%) and the highest removal efficiency (i.e., 49.84%) for Soil No. 1. But the highest destruction efficiency (i.e., 64.47%) for Soil No. 1 was obtained by adding two layers of 1.5g UPF-030 iron powder as the catalyst. For Soil No. 2 contaminated by trichloroethylene or 4-chlorophenol, a greater DRE and removal efficiency were obtained by adding one layer of 1.5 g UPF-030 iron powder. However, to obtain greater destruction efficiencies for Soil No. 2 contaminated by trichloroethylene and 4-Chlorophenol, adding one layer of scrap and UPF-150 iron powder, respectively are necessary.
APA, Harvard, Vancouver, ISO, and other styles
9

Chun-KaiChiang and 姜竣凱. "AC Electrokinetic Manipulation for Separation and in situ Detection of Cancer Cells." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/k48g9b.

Full text
Abstract:
碩士
國立成功大學
生物醫學工程學系
102
Recently, personalized cancer treatment had been developed vigorously. However, there are many problems in traditional isolation and detection methods, such as low purity, complicated operation procedures, and expensive instruments. Thus, how to separate tumor cells from clinical samples rapidly and precisely and how to improve the efficient diagnosis for a proper reference of personalized treatment are the aims of this study. AC electrokinetics for the manipulation of cells had been widely integrated into microfluidic chips and biosensors for manipulating and analyzing specific targets accurately. In this study, dielectrophoresis and electrorotation were integrated into our novel biochip platform to achieve separation of tumor cells, capture of single tumor cell and analysis of drug response in the tumor cell at the same reaction. In this thesis, three subjects will be introduced, (1) Separation of cancer cells from complex samples by electrokinetics: We developed a new on-chip separation method by different dielectric properties, cancer cells were transported to specific detection area and non-cancer cells were excluded out of detection area as an AC electric field was applied to each electrodes. (2) Capture of single cancer cell by a switch circuit and three-dimensional dielectrophoresis: When single cancer cell entered into detection area, the upper electrodes were turned on and generated a strong electric field with under electrodes to block extra cancer cells. That single cell would be tracked to the detection center with a relatively low electric field. The efficiency to capture single cell is up to 85% within one min. (3) Assessment of cancer cells’ electrical characteristics by spectrum of three-dimensional electrorotation (ROT): The results of ROT spectrum can be achieved rapid assessment of cancer cells’ electrical characteristic, in which the variations can be reduced obviously and the high frequency of spectrum can be analyzed more completely than traditional ROT method by combining an extra-stabilized system into our device. As a result, the optimal frequency for electrorotation discrimination of cancer cell was found at 100 kHz and the total detection time is within 5 min per cell. Finally, we developed a miniaturized and integrated biochip that can be used in samples pretreatment and detection of cancer cells successively. We hope this platform can be used widely in personalized cancer treatment because of its convenient, timesaving and low cost.
APA, Harvard, Vancouver, ISO, and other styles
10

Liu, Shou-Heng, and 劉守恒. "In-situ Speciation Studies of Copper in Contaminated Soils and Sludges during Electrokinetic Remediation." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/76376579591536515459.

Full text
Abstract:
博士
國立成功大學
環境工程學系碩博士班
92
Electrokinetic remediation (EKR) has been becoming one of the most feasible technologies for in-situ soil decontamination. However, the complex transport phenomena, electrochemistry and complexation reaction paths involved in the EKR is still not well understood. Thus, the main objective of this work was to study the speciation of copper in heavy copper contaminated soils during EKR by EXAFS, XANES, solid-state NMR (SSNMR), FTIR, electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS). An in-situ EXAFS cell was used to reveal the possible reaction pathway during EKR. In addition, EKR of sludges was also conducted to extend the applications. 　　In simplified soil EKR systems (SiO2 or Al2O3), by XANES, it was found that the main copper species on SiO2 and Al2O3 were outer-sphere complexes (aqueous Cu(II)) (80%) and inner-sphere complexes (Cu/Al2O3) (59%), respectively. The mobility of copper in the Al2O3 matrix during EKR was less than that in the SiO2 system possibly because of the strong bonding between copper and Al2O3 surfaces with the edge-sharing bidentate mode (inner-sphere complexes). It was found that about 54% and 27% of Cu(II) on SiO2 and Al2O3, respectively were migrated to the cathode under the electric field (5 V/cm) for 180 min. 　　Speciation of copper-humic substances (HS) in the EKR of the contaminated soil was also studied by in-situ EXAFS and XANES spectroscopies. The least-square fits of the XANES spectra suggested that the main copper species in the contaminated soil were Cu-HS (50%), CuCO3 (28%), Cu2O (11%) and CuO (11%). By FTIR, Cu-HS as an unidentate complex was observed. The Cu-HS in the contaminated soil possessed equatorial and axial Cu-O bond distances of 1.94 and 2.17 Å with coordination numbers (CNs) of 3.6 and 1.4, respectively. In the EKR process, the axial Cu-O bond distance in the Cu-HS complexes was increased by 0.15 Å, which might be due to a ligand exchange of the Cu-HS with H2O molecules in the electrolyte. After 180 min of EKR, about 50% of the Cu-HS complexes (or 24% of total copper) 　　　ｉn the soil were dissolved and formed [Cu(H2O)6]2+ in the electrolyte and 71% (or 17% of total copper in the soil) of which were migrated to the cathode under the electric field (5 V/cm). 　　In the ethylenediaminetetraacetic acid (EDTA)-enhanced EKR of soils, the main copper species in the contaminated soil were CuCO3 (41%), CuO (40%) and adsorbed copper (Cu/SiO2) (19%). The fitted EXAFS data showed that the bond distance of Cu-(O)-Si was 3.25 Å with a coordination number (CN) of 1.0 in the second shells, suggesting a chemical interaction between copper and the soil surfaces. 　　In the presence of EDTA (0.05 M), a Cu-EDTA complex having the equatorial and axial Cu-O bond distances of 1.96 Å and 2.21 Å, respectively, was observed. The EPR spectra showed that copper (Cu(II)) was complexed with EDTA in a square-plannar arrangement with four oxygen-containing groups. Interestingly, after 180 min of EKR, the axial Cu-O bond distance was increased by 0.1 Å. The perturbation might be attributed to the possibility that the weak-field carboxylic acid groups of EDTA in the equatorial plane of Cu(II) were replaced by the strong-field water molecules. 　　In the EKR of a CMP sludge, the main copper species in the sludge were Cu(OH)2 (73%), nano CuO (14%) and CuO (13%). About 85% of the copper were dissolved (possibly formed [Cu(H2O)6]2+) in the electrolyte and 13% of which was migrated to the cathode under the electric field (5 V/cm) for 120 min. In addition, it was found that nano CuO has a higher mobility than its bulk CuO during EKR, which may be due to at least two possibilities: (1)nano copper has a higher dissolution rate; (2) nano CuO may be migrated directly to cathode. 　　An exploratory study for oxidation of gas-phase mercury by nitric acid vapor and halogen gas was also conducted. Arrhenius expression for the oxidation of gas phase mercury by bromine gas is 8.4×10-16 exp [-(554 ± 69)/T] cm3 molecule-1s-1, corresponding to a rate coefficient of (1.3 ± 0.3)×10-16 cm3 molecule-1s-1 at 294 K and an activation energy of 4.6 ± 0.6 kJ mol-1. The cost for 90% removal of mercury from a simulated flue gas of power plants by Br2 gas was estimated to about 5000$/lb, which is a cost-effective method compared to other technologies. In addition, the oxidation products and excess bromine gas are easy to handle since the oxidized form of mercury can subsequently be removed by the dissolution in an aqueous gas absorber or by the adsorption on sorbents in a baghouse or electrostatic precipitator.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "In-situ electrokinetics"

1

A, Parker Randy, National Risk Management Research Laboratory (U.S.), and Superfund Innovative Technology Evaluation Program (U.S.), eds. In situ bioremediation by electrokinetic injection. Cincinnati, OH: U.S. Environmental Protection Agency, [National Risk Management Research Laboratory, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Superfund Innovative Technology Evaluation Program (U.S.), National Risk Management Research Laboratory (U.S.), and Tetra Tech EM Inc, eds. Sandia National Laboratories in situ electrokinetic extraction technology: Innovative technology evaluation report. Cincinnati, Ohio: National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

United States. Environmental Protection Agency., ed. DEMONSTRATION BULLETIN, IN SITU ELECTROKINETIC EXTRACTION SYSTEM... EPA/540/MR-97/509... U.S. ENVIRONMENTAL PROTECTION AGENCY... NOVEMBER 19. [S.l: s.n., 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

United States. Environmental Protection Agency, ed. DEMONSTRATION BULLETIN, IN SITU ELECTROKINETIC EXTRACTION SYSTEM... EPA/540/MR-97/509... U.S. ENVIRONMENTAL PROTECTION AGENCY... NOVEMBER 19. [S.l: s.n., 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "In-situ electrokinetics"

1

Shiba, S., Y. Hirata, and T. Seno. "In-situ Electrokinetic Remediation of Soil and Water in Aquifer Contaminated by Heavy Metal." In Groundwater Updates, 135–40. Tokyo: Springer Japan, 2000. http://dx.doi.org/10.1007/978-4-431-68442-8_23.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kim, Soon-Oh, Keun-Young Lee, and Kyoung-Woong Kim. "Fundamentals of electrokinetics." In In-Situ Remediation of Arsenic-Contaminated Sites, 87–113. CRC Press, 2014. http://dx.doi.org/10.1201/b17619-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

"Fundamentals of electrokinetics." In In-Situ Remediation of Arsenic-Contaminated Sites, 121–48. CRC Press, 2018. http://dx.doi.org/10.1201/b17619-13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

"1 In Situ Remediation of Contaminated Soils by Electrokinetic Processes." In Hazardous and Radioactive Waste Treatment Technologies Handbook, 129–66. CRC Press, 2001. http://dx.doi.org/10.1201/9781420036459-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Pavlatos, Nikiforos G., and Athanasios (Tom) Scarpas. "Framework for in situ soil stabilization based on electrokinetic principles." In Functional Pavement Design, 1247–56. CRC Press, 2016. http://dx.doi.org/10.1201/9781315643274-138.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Shiba, S., and Y. Hirata. "In-situ electrokinetic remediation of groundwater contaminated by heavy metal." In Computational Methods in Water Resources, Proceedings of the XIVth International Conference on Computational Methods in Water Resources (CMWR XIV), 883–90. Elsevier, 2002. http://dx.doi.org/10.1016/s0167-5648(02)80154-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Hirata, Y., S. Shiba, T. Seno, and K. Yamaberi. "In-situ electrokinetic and hydraulic remediation of saturated aquifer contaminated by heavy metal." In Groundwater Engineering - Recent Advances. Taylor & Francis, 2003. http://dx.doi.org/10.1201/9781439833605.ch39.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Marks, Robert E., Yalcin B. Acar, and Robert J. Gale. "In Situ Remediation of Contaminated Soils Containing Hazardous Mixed Wastes by Bio-Electrokinetic Remediation and Other Competitive." In Remediation of Hazardous Waste Contaminated Soils, 405–36. Routledge, 2018. http://dx.doi.org/10.1201/9780203740880-18.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Cameselle, C. "Electrokinetic remediation and other physico-chemical remediation techniques for in situ treatment of soil from contaminated nuclear and NORM sites." In Environmental Remediation and Restoration of Contaminated Nuclear and Norm Sites, 161–84. Elsevier, 2015. http://dx.doi.org/10.1016/b978-1-78242-231-0.00008-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "In-situ electrokinetics"

1

Haroun, Muhammad Raeef, Bisweswar Ghosh, George V. Chilingar, Sibel Pamukcu, J. K. Wittle, and Manal Abdel Aziz Al Badawi. "A Novel Electrokinetics Method of Oilfield Scale Control in-situ." In SPE Western Regional Meeting. Society of Petroleum Engineers, 2010. http://dx.doi.org/10.2118/133619-ms.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Yang, Kai, and Jie Wu. "In Situ Electrokinetic Preconcentrator for Conductive Biofluids." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18466.

Full text
Abstract:
To detect and identify biomolecules at its infectious dose, all sensors require a relatively long time — days or even weeks — for reliable results. This delay occurs because the collection of analyte molecules onto the sensing elements depends solely on the diffusion process of those agents to a sensor. This work seeks to enhance the transport process, and thereby significantly improve a sensor’s detection capability. This work investigates an in-situ, label-free nanoparticle (e.g. protein) preconcentrator based on a new AC electrothermal effect (ACET) that can operate even in a highly conductive solution for which current methods such as dielectrophoresis, electrophresis or electroosmosis won’t function effectively. The proposed AC electrokinetic preconcentrator is expected to significantly increase the nanoparticle counts, realizing sub-femto molar detection in real time.
APA, Harvard, Vancouver, ISO, and other styles
3

Wrixon, Robert C., and George A. Cooper. "In-situ Casing Consolidation by Electrokinetic and Electrochemical Methods." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1997. http://dx.doi.org/10.2118/38586-ms.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ortega-Tong, Pablo, James Jamieson, Riccardo Sprocati, Jing Sun, Massimo Rolle, Andy Fourie, and Henning Prommer. "Identification of Physical and Geochemical Controls on the Electrokinetic in situ Leaching of Gold." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1999.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Yang Wei, Sun Bingshuang, Zhou Hui, and Li shiliang. "Experimental study on electrokinetic remediation of in-situ Cd contaminated soil by applied voltage." In Environment (ICMREE). IEEE, 2011. http://dx.doi.org/10.1109/icmree.2011.5930701.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Corral, Guillermo, and Nazmul Islam. "Bioparticle Manipulation by an Orthogonal Electrode Preconcentrator." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52724.

Full text
Abstract:
Optimizing the cost and time is a major concern in bioparticle manipulation. Current bioparticle detection are multi-step processes that usually take at least several hours or even days to complete multiple reagents delivery, incubations and several washing processes. This highly labor-intensive work and lack of automation could result in reduced reliability and low efficiency. A pre-concentration or enrichment step will expand the application range to more dilute, practical samples and real-time detection. This paper reports the in-situ particle concentrators using AC electrokinetic techniques. With optimized design of channel geometry, orthogonal electrode patterns, and properly selected operation condition (ac frequency and voltage), the preconcentration system greatly reduced the reaction time to several minutes instead of several hours, and improved sensitivity of the assay. The goal of this research work is to develop an AC electrokinetic (ACEK) flow through preconcentrator for concentration of biomolecules using orthogonal electrode pattern.
APA, Harvard, Vancouver, ISO, and other styles
7

Ribeiro, A., J. Araújo, A. Mota, R. Campos, C. Vilarinho, and J. Carvalho. "Decontamination of Heavy Metals From Municipal Sewage Sludge (MSS) by Electrokinetic Remediation." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11221.

Full text
Abstract:
Abstract A large quantity of sludges resulting from the treatment of MWWTP (Municipal Wastewater Treatment Plant) effluent is generated annually following the increase of population density and acceleration of urbanization. Sludge production in Europe has been predicted by around 12 million tons in 2020. As a solid waste, appropriate disposal of Municipal Sewage Sludge (MSS) has been taken seriously due to its larger volume and toxic substances such as heavy metals. Electrokinetic remediation has more advantages in heavy metals uptake compared to other technologies, due to the ability to treat soils in-situ and to remove heavy metals from soils. In this work, it was studied the remediation of MSS by the electrokinetic remediation coupled with activated carbon (AC) as a permeable reactive barrier (PRB). It was applied an electric current of 3 V cm−1 and it was used an AC/sludge ratio of 30 g kg−1 of contaminated sludge for the preparation of the PRB. In each trial, the evolution of cadmium (Cd), lead (Pb), copper (Cu), chromium (Cr), nickel (Ni) and zinc (Zn) removal from the sludge were evaluated. Results proved that this process is perfectly suited for the removal of chromium, nickel and zinc metals from the sludge. At the end of the operation time, it was achieved a maximum removal rate of 56% for chromium, 73% for nickel and 99% for zinc, with initial concentrations of 2790 mg kg−1, 2840 mg kg−1, and 94200 mg kg−1, respectively. Based on these results, it was proved the technical viability of the proposed technology (electrokinetic with AC as a permeable reactive barrier) to treat municipal sewage sludges.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "In-situ electrokinetics"

1

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

Full text
Abstract:
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.
APA, Harvard, Vancouver, ISO, and other styles
2

Development of an integrated, in-situ remediation technology: Task 2--4, electrokinetic modeling. Topical report, September 26--May 25, 1996. Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/473988.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'In-situ electrokinetics' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography