Relevant bibliographies by topics / Mineral precipitation / Journal articles
To see the other types of publications on this topic, follow the link: Mineral precipitation.

Journal articles on the topic 'Mineral precipitation'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Mineral precipitation.'

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.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Fritz, B., and C. Noguera. "Mineral Precipitation Kinetics." Reviews in Mineralogy and Geochemistry 70, no. 1 (January 1, 2009): 371–410. http://dx.doi.org/10.2138/rmg.2009.70.8.

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

Amiri, M., and N. Sattary. "MINERAL PRECIPITATION IN SOLUTION CULTURE." Acta Horticulturae, no. 644 (February 2004): 469–71. http://dx.doi.org/10.17660/actahortic.2004.644.62.

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

Paraskeva, Christakis A., Petros C. Charalambous, Lars-Erik Stokka, Pavlos G. Klepetsanis, Petros G. Koutsoukos, Peter Read, Terje Ostvold, and Alkiviades C. Payatakes. "Sandbed Consolidation with Mineral Precipitation." Journal of Colloid and Interface Science 232, no. 2 (December 2000): 326–39. http://dx.doi.org/10.1006/jcis.2000.7161.

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

Jeen, Sung-Wook. "Sensitivity Analyses for Modeling Evolving Reactivity of Granular Iron for the Treatment of Trichloroethylene." Water 10, no. 12 (December 19, 2018): 1878. http://dx.doi.org/10.3390/w10121878.

Full text
Abstract:
To better predict long-term performance of a remediation system, parameters of a numerical model should be constrained with care by calibrating with reliable experimental data. This study conducted sensitivity analyses for model parameters, which were shown to represent reasonably well the observed geochemical behaviors for the column experiments that evaluated evolving reactivity of granular iron for the treatment of trichloroethylene (TCE) resulting from precipitation of secondary minerals. The particular model parameters tested include iron corrosion rate, aragonite and Fe2(OH)2CO3 precipitation rates, and proportionality constants for each mineral. For sensitivity analyses, a specific parameter was systematically changed, while other parameters were fixed at the values for the base case. The ranges of parameters tested were determined based on the previous modeling study. The results showed that the most important and sensitive model parameters were secondary mineral precipitation rates. Also, not only absolute precipitation rate for each mineral but also relative precipitation rates among different minerals were important for system performance. With help of sensitivity analysis, the numerical model can be used as a predictive tool for designing an iron permeable reactive barrier (PRB) and can provide implications for the long-term changes in reactivity and permeability of the system.
APA, Harvard, Vancouver, ISO, and other styles
5

Reed, M. H. "Sulfide Mineral Precipitation from Hydrothermal Fluids." Reviews in Mineralogy and Geochemistry 61, no. 1 (January 1, 2006): 609–31. http://dx.doi.org/10.2138/rmg.2006.61.11.

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

Bryant, S. L., R. S. Schechter, and L. W. Lake. "Mineral sequences in precipitation/dissolution waves." AIChE Journal 33, no. 8 (August 1987): 1271–87. http://dx.doi.org/10.1002/aic.690330805.

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

Crompton, Jeff W., Gwenn E. Flowers, Dirk Kirste, Birgit Hagedorn, and Martin J. Sharp. "Clay mineral precipitation and low silica in glacier meltwaters explored through reaction-path modelling." Journal of Glaciology 61, no. 230 (2015): 1061–78. http://dx.doi.org/10.3189/2015jog15j051.

Full text
Abstract:
AbstractThe subglacial chemical weathering environment is largely controlled by low temperatures and the presence of freshly comminuted minerals with a high surface area. These characteristics are believed to promote dissolution processes that give rise to low silica and high Ca2+fluxes emanating from glacierized basins. We test an alternative hypothesis, that mineral precipitation reactions in the subglacial environment play an equally important role in controlling the water chemistry in glacierized basins. We analyze borehole and proglacial water chemistry from a subarctic polythermal glacier, complemented by mineral XRD analysis of suspended sediment, till and bedrock samples. In conjunction with a thermodynamic analysis of the water and mineral chemistry, we use reaction-path modelling to study the chemical enrichment of water through the glacier system. We find that the high pH of the subglacial environment is conducive to secondary mineral precipitation, and that it is not possible to balance the water chemistry using dissolution reactions alone. We show that low silica can be explained by standard weathering reactions without having to invoke mineral-leaching reactions. Our results suggest that subglacial weathering intensity may be significantly underestimated if the production of secondary minerals is not considered.
APA, Harvard, Vancouver, ISO, and other styles
8

Gong, W., Q. Min, R. Li, A. Teller, E. Joseph, and V. Morris. "Detailed cloud resolving model simulations of the impacts of Saharan air layer dust on tropical deep convection – Part 1: Dust acts as ice nuclei." Atmospheric Chemistry and Physics Discussions 10, no. 5 (May 19, 2010): 12907–52. http://dx.doi.org/10.5194/acpd-10-12907-2010.

Full text
Abstract:
Abstract. Observational studies suggest that the Saharan Air Layer (SAL), an elevated layer (850–500 hPa) of Saharan air and mineral dust, has strong impacts on the microphysical as well as dynamical properties of tropical deep convective cloud systems along its track. In this case study, numerical simulations using a two-dimensional Detailed Cloud Resolving Model (DCRM) were carried out to investigate the dust-cloud interactions in the tropical deep convection, focusing on the dust role as Ice Nuclei (IN). The simulations showed that mineral dust considerably enhanced heterogeneous nucleation and freezing at temperatures warmer than −40 °C, resulting in more ice hydrometeors number concentration and reduced precipitating size of ice particles. Because of the lower in the saturation over ice as well as more droplet freezing, total latent heating increased, and consequently the updraft velocity was stronger. On the other hand, the increased ice deposition consumed more water vapor at middle troposphere, which induces a competition for water vapor between heterogeneous and homogeneous freezing and nucleation. As a result, dust suppressed the homogeneous droplet freezing and nucleation due to the heterogeneous droplet freezing and the weakened transport of water vapor at lower stratosphere, respectively. These effects led to decreased number concentration of ice cloud particles in the upper troposphere, and consequently lowered the cloud top height during the stratus precipitating stage. Acting as IN, mineral dust also influenced precipitation in deep convection. It initiated earlier the collection because dust-related heterogeneous nucleation and freezing at middle troposphere occur earlier than homogeneous nucleation at higher altitudes. Nevertheless, the convective precipitation was suppressed by reduced collection of large graupel particles and insufficient fallout related to decreased sizes of precipitating ice hydrometeors. On the contrary, dust increased the precipitation in stratiform precipitation through deposition growth. Overall, the comprehensive effects of mineral dust suppressed the precipitation by up to 22%.
APA, Harvard, Vancouver, ISO, and other styles
9

Hill, Michael G., Erich Königsberger, and Peter M. May. "Mineral precipitation and dissolution in the kidney." American Mineralogist 102, no. 4 (April 2017): 701–10. http://dx.doi.org/10.2138/am-2017-5778.

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

Hamdan, Nasser, Zhi Zhao, Maritza Mujica, Edward Kavazanjian, and Ximin He. "Hydrogel-Assisted Enzyme-Induced Carbonate Mineral Precipitation." Journal of Materials in Civil Engineering 28, no. 10 (October 2016): 04016089. http://dx.doi.org/10.1061/(asce)mt.1943-5533.0001604.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Luiz, Thiago Boeno Patricio, José Luiz Silvério da Silva, and Leônidas Luiz Volcato Descovi Filho. "Hydrogeochemical modeling of fluoride contents in groundwater in outcrop area of Guarani Aquifer System, southern Brazil." Geologia USP. Série Científica 19, no. 1 (March 14, 2019): 69–82. http://dx.doi.org/10.11606/issn.2316-9095.v19-141639.

Full text
Abstract:
Groundwater quality problems with high fluoride contents were studied in an outcrop area on a portion of Guarani Aquifer System (GAS), in the state of Rio Grande do Sul, southern Brazil. The methodology was based on the evaluation of tectonic structures lineaments and geochemical modeling of 13 groundwater physical-chemical data with anomalies of fluoride from tube wells. The lineaments trace and speciation code PHREEQC 3.3.5 used suggest the occurrence of distinct mineralogical contributions, in which the precipitation of carbonate minerals from the mineral structure of the GAS sandstone and cation exchange play a fundamental role in the hydrogeochemistry of fluoride. The results were analyzed by the main transects, which allowed the definition of characteristics of mineral dissolution and precipitation in the environment. The halite and sylvite showed dissolution tendencies along the traced transects, towards the mineral equilibrium. The fluorite mineral presented undersaturation with tendencies to mineral equilibrium and, possibly, precipitation in the most salinized waters. The applied methodology allowed the extraction of information for a better understanding of the hydrogeochemical dynamics of salinized waters and their water/rock interactions in outcrop area of the GAS, constituting a material to support the research of anomalous fluoride concentrations in groundwater and the practices of management of this important aquifer system.
APA, Harvard, Vancouver, ISO, and other styles
12

Gao, Yue, Jianmin Bian, and Chao Song. "Study on the dynamic relation between spring discharge and precipitation in Fusong County, Changbai Mountain, Jilin Province of China." Water Supply 16, no. 2 (October 20, 2015): 428–37. http://dx.doi.org/10.2166/ws.2015.153.

Full text
Abstract:
Mineral water is the main source of drinking water and is a dominant component of local economic development in Fusong County, Changbai Mountain, Jilin Province of China. Precipitation is the main recharge factor for mineral water in Fusong County; therefore, it is necessary to determine whether precipitation can effectively guarantee the supply of mineral water resources. In this study, precipitation data from the Donggang hydrological station in Fusong County were collected and analyzed to determine annual changes in characteristics and extreme probability. The results show that precipitation is stable and that the probability of extreme precipitation is small. Precipitation and mineral spring discharge in the Mingshui, Baixi, No. 2 Jinjiang, and Laoling springs were then collected and analyzed for separate periods by using a continuous wavelet method. The results show that the main oscillation period of both precipitation and spring discharge is approximately 11 months. Finally, the cross-wavelet method is conducted to analyze the period relationships between spring discharge and precipitation. The results show that both precipitation and spring discharge share the same phase, which indicates spring discharge has an immediate reaction to precipitation changes.
APA, Harvard, Vancouver, ISO, and other styles
13

Jones, Trevor A., and Russell L. Detwiler. "Fracture sealing by mineral precipitation: The role of small-scale mineral heterogeneity." Geophysical Research Letters 43, no. 14 (July 28, 2016): 7564–71. http://dx.doi.org/10.1002/2016gl069598.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Min, Q. L., R. Li, B. Lin, E. Joseph, S. Wang, Y. Hu, V. Morris, and F. Chang. "Evidence of mineral dust altering cloud microphysics and precipitation." Atmospheric Chemistry and Physics 9, no. 9 (May 18, 2009): 3223–31. http://dx.doi.org/10.5194/acp-9-3223-2009.

Full text
Abstract:
Abstract. Multi-platform and multi-sensor observations are employed to investigate the impact of mineral dust on cloud microphysical and precipitation processes in mesoscale convective systems. For a given convective strength, small hydrometeors were more prevalent in the stratiform rain regions with dust than in those regions that were dust free. Evidence of abundant cloud ice particles in the dust sector, particularly at altitudes where heterogeneous nucleation of mineral dust prevails, further supports the observed changes of precipitation. The consequences of the microphysical effects of the dust aerosols were to shift the precipitation size spectrum from heavy precipitation to light precipitation and ultimately suppressing precipitation.
APA, Harvard, Vancouver, ISO, and other styles
15

Min, Q. L., R. Li, B. Lin, E. Joseph, S. Wang, Y. Hu, V. Morris, and F. Chang. "Evidence of mineral dust altering cloud microphysics and precipitation." Atmospheric Chemistry and Physics Discussions 8, no. 6 (November 3, 2008): 18893–910. http://dx.doi.org/10.5194/acpd-8-18893-2008.

Full text
Abstract:
Abstract. Multi-platform and multi-sensor observations are employed to investigate the impact of mineral dust on cloud microphysical and precipitation processes in mesoscale convective systems. It is clearly evident that for a given convection strength,small hydrometeors were more prevalent in the stratiform rain regions with dust than in those regions that were dust free. Evidence of abundant cloud ice particles in the dust sector, particularly at altitudes where heterogeneous nucleation process of mineral dust prevails, further supports the observed changes of precipitation. The consequences of the microphysical effects of the dust aerosols were to shift the precipitation size spectrum from heavy precipitation to light precipitation and ultimately suppressing precipitation.
APA, Harvard, Vancouver, ISO, and other styles
16

Shimoda, Satoko, Toshiyuki Nakazawa, Hiroyasu Kato, Yukio Tachi, and Yoshimi Seida. "The effect of alkaline alteration on sorption properties of sedimentary rock." MRS Proceedings 1665 (2014): 179–84. http://dx.doi.org/10.1557/opl.2014.644.

Full text
Abstract:
ABSTRACTThe potential effect of high pH plume caused by cementitious materials must be evaluated in the performance assessment for HLW geological disposal. Alkaline plume would lead to change sorption properties of host rock by primary mineral dissolution, secondary mineral precipitation and sequential change of pore water chemistry. In this study, the effect of alkaline alteration on sorption of Cs, Ni and Th was investigated using rock samples from the Horonobe Underground Research Laboratory. Crushed rock samples were reacted in high pH alkaline solution at 90 °C for 45 days, 95 days and 1,383 days, respectively. As a result of sample analysis, it was supposed that zeolitic mineral was precipitated as secondary mineral. The cation exchange capacity slightly increased in comparison with the unaltered sample. Distribution coefficients (Kd) of Cs, Ni and Th on unaltered and altered rock sample were measured by batch sorption experiment in synthetic groundwater. Kd of Cs increased with the alteration period. These results show that secondary minerals contribute to the increase in Cs sorption. By contrast, Kd of Ni and Th decreased with the alteration period. This change might be caused by dissolution of clay minerals and amorphous silicates controlling Ni and Th sorption by surface complexation. These results imply that effects of alkaline alteration on Kd of rocks depend on the dissolution/precipitation of minerals, their surface properties and sorption mechanisms.
APA, Harvard, Vancouver, ISO, and other styles
17

Cooke, A. J., R. K. Rowe, B. E. Rittmann, and I. R. Fleming. "Modeling biochemically driven mineral precipitation in anaerobic biofilms." Water Science and Technology 39, no. 7 (April 1, 1999): 57–64. http://dx.doi.org/10.2166/wst.1999.0328.

Full text
Abstract:
A numerical model links the build-up of mineral precipitate (primarily CaCO3) and the anaerobic activity of biofilms, which occur in granular material permeated with leachate from a municipal solid waste landfill. The model represents the porous-media flow system as a collection of elements in which each element acts as a separate, fixed-film reactor. The model represents biofilm growth for microorganisms carrying out acetogenesis of propionate and methanogenesis of acetate. It also directly links substrate utilization to mineral precipitation and accounts for the accumulation of inert biomass on the porous media at any time or position along the length of the column. Thus, the model describes the ecological interactions among fermenters, methanogens, inert biomass, and mineral precipitate. Although substrate utilization by the active microorganisms drives the entire system, mineral precipitate becomes a dominant component in the biofilm.
APA, Harvard, Vancouver, ISO, and other styles
18

Srinivasa Reddy, V., K. Hema Latha, Ravulaparthi Sudha Lahari, and M. V. Seshagiri Rao. "Bio-Mediated Sandy Soil Stabilization Using Urease Enzymatic Calcite Precipitation: A Sustainable Solution." E3S Web of Conferences 184 (2020): 01113. http://dx.doi.org/10.1051/e3sconf/202018401113.

Full text
Abstract:
A recently developing bacteria based soil-stabilization technique inspired from microbially impelled calcite precipitation phenomena is verified for geo-technical applications. This phenomena make use of the metabolic mechanics of microorganisms to produce calcite precipitation all through soil matrix enhancing the soil’s engineering properties. Unconfined compressive strength (UCS) and soil hydraulic conductivity or permeability is evaluated to validate the formation of mineral precipitates between and around soil grains. Due to metabolic process of bacteria calcite minerals are generated binding the soil particles together reducing the voids volume and diameter subsequently a dense microstructure is formed. This improvement of soil homogeneity reduces the hydraulic conductivity and increase the unconfined compression strength of bacteria-treated soil samples. From the results of experimental investigations it is confirmed that mineral precipitation biologically proves to be an effective and efficient method of soil stabilization in increasing the stiffness and permeability of soil samples considered for study.
APA, Harvard, Vancouver, ISO, and other styles
19

Ahonen, Lasse, Pauliina Nurmi, and Olli H. Tuovinen. "Thermodynamic Simulation of Sulphide Mineral Leaching." Advanced Materials Research 71-73 (May 2009): 437–40. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.437.

Full text
Abstract:
Geochemical modeling program PHREEQC was used to simulate generic bioleaching processes. Carbonate minerals (e.g., calcite) dissolve in acid solution, increasing the solution pH and Ca concentration while the concentration of CO2 may be controlled by the equilibrium with the atmospheric CO2. Non-oxidative dissolution of Fe-monosulphides was demonstrated to release H2S and increase the pH. In the absence of ferric iron precipitation (goethite), the oxidation of pyrite decreased the solution pH from 2 to ~1.4, while the oxidation of Fe-monosulphide and chalcopyrite increased the solution pH to ~3.2-3.4. Assuming equilibrium precipitation of goethite, oxidative leaching decreased the solution pH for all three minerals from pH ~2 to ~0.9-1.2. Adjustment of the solution pH to 1.8 or 2.0 with KOH with concurrent equilibrium precipitation of K-jarosite resulted in low dissolved iron concentrations.
APA, Harvard, Vancouver, ISO, and other styles
20

van Rensburg, P., E. V. Musvoto, M. C. Wentzel, and G. A. Ekama. "Modelling multiple mineral precipitation in anaerobic digester liquor." Water Research 37, no. 13 (July 2003): 3087–97. http://dx.doi.org/10.1016/s0043-1354(03)00173-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Reeves, Daniel, and Daniel H. Rothman. "Age dependence of mineral dissolution and precipitation rates." Global Biogeochemical Cycles 27, no. 3 (September 2013): 906–19. http://dx.doi.org/10.1002/gbc.20082.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

González-Muñoz, Maria Teresa, Carlos Rodriguez-Navarro, Francisca Martínez-Ruiz, Jose Maria Arias, Mohamed L. Merroun, and Manuel Rodriguez-Gallego. "Bacterial biomineralization: new insights fromMyxococcus-induced mineral precipitation." Geological Society, London, Special Publications 336, no. 1 (2010): 31–50. http://dx.doi.org/10.1144/sp336.3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Ruiz-Agudo, E., C. V. Putnis, and A. Putnis. "Coupled dissolution and precipitation at mineral–fluid interfaces." Chemical Geology 383 (September 2014): 132–46. http://dx.doi.org/10.1016/j.chemgeo.2014.06.007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Pozo, Manuel, and José Calvo. "An Overview of Authigenic Magnesian Clays." Minerals 8, no. 11 (November 9, 2018): 520. http://dx.doi.org/10.3390/min8110520.

Full text
Abstract:
Clay authigenesis mostly concerns: (a) the formation of clays by direct precipitation from solution, called “neoformation” and (b) development of clays by transformation of precursor minerals. Precipitation from solution implies that a new mineral structure crystallizes, so that a prior mineral structure is not inherited. Transformation of precursor detrital minerals, a process also termed “neoformation by addition”, can be conducted whether throughout precipitation on pre-existing natural surfaces or transformation and reaction on pre-existing surfaces. Both processes have been recognized as effective mechanisms in the formation of Mg-clays, which mostly include 2:1 clay minerals, such as talc-kerolite and Mg-smectites, as well as fibrous clays (sepiolite, palygorskite). Authigenic Mg-clay minerals occur in both modern and ancient marine and non-marine depositional environments, although formation of these clays in hydrothermal continental and seafloor settings must be also outlined. Most favourable conditions for the formation of Mg-clays on earth surface are found in evaporitic depositional environments, especially where parent rocks are enriched in ferromagnesian minerals. In these settings, Mg-clays are important constituent of weathering profiles and soils and can form thick deposits of significant economic interest. Based on this review of authigenic clay deposits, we propose three geochemical pathways, mainly related to continental environments, for the origin of authigenic Mg-clays: formation of Al-bearing Mg-clays (pathway 1), formation of Al-free Mg clays (pathway 2) and formation of sepiolite from other Mg-clay minerals (pathway 3).
APA, Harvard, Vancouver, ISO, and other styles
25

Kremenetskaya, I. P., T. K. Ivanova, B. I. Gurevich, A. I. Novikov, and V. V. Semushin. "Separate deposition of metals from highly concentrated solutions with granulated magnesia-silicate reagent." Vestnik MGTU 24, no. 1 (March 31, 2021): 118–30. http://dx.doi.org/10.21443/1560-9278-2021-24-1-118-130.

Full text
Abstract:
Multi-stage deposition of metals from a sulfate solution with a high concentration of iron, aluminum, copper, zinc, and nickel has been studied. The concentrations of the components correspond to the composition of the sub-basement waters of the Gaisky GOK. Granular magnesia-silicate reagent based on serpentinite (Khalilovsk magnesite deposit, the Orenburg region, Russia) has been used as an alkaline agent. The magnesia-silicate reagent's ability to reduce the acidity of solutions is due to the presence of products of destruction of the original serpentine mineral, mainly magnesium oxide. The results of the solutions multi-stage purification from metals simulation have been presented. It has been found that the reagent did not wholly exhaust its activity during a single contact with the solution. Therefore, the possibility of its repeated use for the 2nd and 3rd time has been studied. As the solution is neutralized according to the known pH range of the beginning and complete deposition of metal compounds, first iron, and then aluminum are deposited. For copper and nickel, the effect of co-precipitation is observed until the pH of precipitation of poorly soluble compounds is reached. Iron is the main component of precipitations at the 1st, 2nd, and 3rd stages, which corresponds to pH = 2.4-3.7. At the 4th stage (pH = 4.0), the precipitations consisted mainly of aluminum compounds. The copper and nickel content in precipitations increase due to decreased concentration of major components (aluminum and iron) and a pH increase. The deposition of zinc from the solution occurs not to the precipitations, but on the granules surfaces. Precipitations enriched in aluminum and iron have been obtained. Sorption and co-precipitation processes have been observed for copper, zinc, and nickel, which prevents individual precipitation by these metals. Thermally activated serpentine minerals can be considered a promising alkaline reagent for technogenic solutions neutralization and purification.
APA, Harvard, Vancouver, ISO, and other styles
26

Brookshaw, D. R., R. A. D. Pattrick, J. R. Lloyd, and D. J. Vaughan. "Microbial effects on mineral–radionuclide interactions and radionuclide solid-phase capture processes." Mineralogical Magazine 76, no. 3 (June 2012): 777–806. http://dx.doi.org/10.1180/minmag.2012.076.3.25.

Full text
Abstract:
AbstractUnderstanding the environmental and biogeochemical behaviour of radionuclides is essential for managing our nuclear legacy safely. Remediation efforts and the concept of geological disposal of nuclear waste focus on immobilizing radionuclides within the subsurface. Here we review recent developments in the understanding of solid-phase capture processes of Cs, Sr, Tc, U, Pu and Np. Abiotic interactions between minerals and these radionuclides (including sorption, reductive precipitation and co-precipitation) have been studied in various conditions. Microbially driven processes are much less well characterized, for example the effects of microbial reduction on the structure and reactivity of existing minerals, or their role in the formation of new minerals. Metabolites released by bacteria can play a role in both mineral dissolution and formation, and better understanding their release and role in mineralization has great potential in the development of solid-phase capture processes for radionuclides.With the aid of a map of the research landscape covered by this review (created using a cluster-analysis tool, a self-organizing map), we highlight the most promising sequestration processes for specific radionuclides. However, radionuclides exhibit highly species-specific behaviour in their interactions with minerals and microorganisms. More research is required to characterize the role mineral surfaces play in bioreductive immobilization of Pu and Np, the reduction products formed, and their relative stability. Further studies should concentrate on more environmentally relevant experiments that include bacteria, minerals and radionuclides.
APA, Harvard, Vancouver, ISO, and other styles
27

Martínez-Martínez, Javier, David Benavente, Nicoletta Fusi, and Juan Carlos Cañaveras. "Brucite-Aragonite Precipitates as Weathering Products of Historic Non-MgO-Based Geomaterials." Minerals 10, no. 7 (June 30, 2020): 599. http://dx.doi.org/10.3390/min10070599.

Full text
Abstract:
This paper analyses the mineralogical composition, texture, and structure of a stalactite sampled from the city-wall storerooms of the Nueva Tabarca fortress (southeast Spain). This speleothem presents an uncommon mineral assemblage: aragonite, brucite, gypsum, silica, and halite. Internally, it shows complex structure: (1) a central soda-straw composed by aragonite; (2) an external puff-pastry cone-crust formed preferentially by aragonite and brucite; and (3) an internal branching of coralloids, showing a subtle layering between brucite and aragonite. Gypsum, halite, and silica locate in the outer coating of the cone-crust. The sequent mineral precipitation sequence has been established: aragonite > brucite > gypsum/silica > halite. Speleothem formation is directly related to the chemical weathering of the rocks and mortars used as building materials of the city-wall. Brucite precipitates has been always linked to the presence of MgO-based geomaterials. However, the lack of these compounds as building materials in Nueva Tabarca fortress makes this investigation a unique example of brucite precipitation. PHREEQC calculations showed that interaction between pore waters and the minerals of mortar aggregates (dolomite, pyroxene, and amphibole) leads to rich-magnesium solutions. Evaporation modelling of lixiviated waters describes the precipitation of the mineral assemblage of the brucite-aragonite speleothems.
APA, Harvard, Vancouver, ISO, and other styles
28

Srisomboon, Surapong, Matana Kettratad, Phakkhananan Pakawanit, Catleya Rojviriya, Prathip Phantumvanit, and Piyaphong Panpisut. "Effects of Different Application Times of Silver Diamine Fluoride on Mineral Precipitation in Demineralized Dentin." Dentistry Journal 9, no. 6 (June 14, 2021): 70. http://dx.doi.org/10.3390/dj9060070.

Full text
Abstract:
Silver diamine fluoride (SDF) is a cost-effective method for arresting active dental caries. However, the limited cooperation of patients may lead to an SDF application time that is shorter than the recommended 1–3 min for carious lesions. Therefore, the aim of this study was to assess the effect of different application times of SDF on the degree of mineral precipitation in demineralized dentin. Demineralized dentin specimens from permanent maxillary molars were treated by applying 38% SDF for 30, 60, or 180 s. Water was applied in the control group. The specimens were immersed in simulated body fluid for 2 weeks, and the mineral precipitation in demineralized dentin was then analyzed using FTIR-ATR, SEM-EDX, and synchrotron radiation X-ray tomographic microscopy (SRXTM). The FTIR-ATR results showed a significant increase in mineral precipitation in the 180 s group after 1 week. However, after 2 weeks, the SRXTM images indicated comparable mineral density between the 30, 60, and 180 s groups. The precipitation of silver chloride and calcium phosphate crystals that occluded dentinal tubules was similar in all experimental groups. In conclusion, an application time of either 30, 60, or 180 s promoted a comparable degree of mineral precipitation in demineralized dentin.
APA, Harvard, Vancouver, ISO, and other styles
29

Hara, Emilio Satoshi, Masahiro Okada, Takuo Kuboki, Takayoshi Nakano, and Takuya Matsumoto. "Rapid bioinspired mineralization using cell membrane nanofragments and alkaline milieu." Journal of Materials Chemistry B 6, no. 38 (2018): 6153–61. http://dx.doi.org/10.1039/c8tb01544a.

Full text
Abstract:
Bone formationin vivooccurs in alkaline environment, which determines the optimal pKaof phosphatases, the optimal amount of calcium for mineral precipitation, and the spherical shape of initial minerals. Manipulation of environmental pH forin vitrosynthesis of bone-like tissue, showed a markedly rapid mineralization with nanofragments and alkaline milieu.
APA, Harvard, Vancouver, ISO, and other styles
30

Teller, A., L. Xue, and Z. Levin. "The effects of mineral dust particles, aerosol regeneration and ice nucleation parameterizations on clouds and precipitation." Atmospheric Chemistry and Physics Discussions 12, no. 3 (March 27, 2012): 8225–67. http://dx.doi.org/10.5194/acpd-12-8225-2012.

Full text
Abstract:
Abstract. This study focuses on the effects of aerosol particles on the formation of convective clouds and precipitation in the Eastern Mediterranean sea with a special emphasis on the role of mineral dust particles in these processes. We used a new detailed numerical cloud microphysics scheme that has been implemented in the Weather Research and Forecast (WRF) model in order to study aerosol-cloud interaction in 3-D configuration based on realistic meteorological data. Using a number of case studies we tested the contribution of mineral dust particles and different ice nucleation parameterizations to precipitation development. In this study we also investigated the importance of recycled (regenerated) aerosols that had been released to the atmosphere following the evaporation of cloud droplets. The results showed that increased aerosol concentration due to the presence of mineral dust enhanced the formation of ice crystals. The dynamic evolution of the cloud system sets the time periods and regions in which heavy or light precipitation occurred in the domain. The precipitation rate, the time and duration of precipitation were affected by the aerosol properties only at small area scales (with areas of about 20 km2). Changes of the ice nucleation scheme from ice supersaturation dependent parameterization to a recent approach of aerosol concentration and temperature dependent parameterization modified the ice crystals concentrations but did not affect the total precipitation in the domain. Aerosol regeneration modified the concentration of cloud droplets at cloud base by dynamic recirculation of the aerosols but also had only a minor effect on precipitation. The major conclusion from this study is that the effect of mineral dust particles on clouds and total precipitation is limited by the properties of the atmospheric dynamics and the only effect of aerosol on precipitation may come from significant increase in the concentration of accumulation mode aerosols. In addition, the presence of mineral dust had much smaller effect on the total precipitation than on its spatial distribution.
APA, Harvard, Vancouver, ISO, and other styles
31

Teller, A., L. Xue, and Z. Levin. "The effects of mineral dust particles, aerosol regeneration and ice nucleation parameterizations on clouds and precipitation." Atmospheric Chemistry and Physics 12, no. 19 (October 12, 2012): 9303–20. http://dx.doi.org/10.5194/acp-12-9303-2012.

Full text
Abstract:
Abstract. This study focuses on the effects of aerosol particles on the formation of convective clouds and precipitation in the Eastern Mediterranean Sea, with a special emphasis on the role of mineral dust particles in these processes. We used a new detailed numerical cloud microphysics scheme that has been implemented in the Weather Research and Forecast (WRF) model in order to study aerosol–cloud interaction in 3-D configuration based on 1° × 1° resolution reanalysis meteorological data. Using a number of sensitivity studies, we tested the contribution of mineral dust particles and different ice nucleation parameterizations to precipitation development. In this study we also investigated the importance of recycled (regenerated) aerosols that had been released to the atmosphere following the evaporation of cloud droplets. The results showed that increased aerosol concentration due to the presence of mineral dust enhanced the formation of ice crystals. The dynamic evolution of the cloud system sets the time periods and regions in which heavy or light precipitation occurred in the domain. The precipitation rate, the time and duration of precipitation were affected by the aerosol properties only at small spatial scales (with areas of about 20 km2). Changes of the ice nucleation scheme from ice supersaturation-dependent parameterization to a recent approach of aerosol concentration and temperature-dependent parameterization modified the ice crystals concentrations but did not affect the total precipitation in the domain. Aerosol regeneration modified the concentration of cloud droplets at cloud base by dynamic recirculation of the aerosols but also had only a minor effect on precipitation. The major conclusion from this study is that the effect of mineral dust particles on clouds and total precipitation is limited by the properties of the atmospheric dynamics and the only effect of aerosol on precipitation may come from significant increase in the concentration of accumulation mode aerosols. In addition, the presence of mineral dust had a much smaller effect on the total precipitation than on its spatial distribution.
APA, Harvard, Vancouver, ISO, and other styles
32

Bjørlykke, K. "Clay mineral diagenesis in sedimentary basins — a key to the prediction of rock properties. Examples from the North Sea Basin." Clay Minerals 33, no. 1 (March 1998): 15–34. http://dx.doi.org/10.1180/000985598545390.

Full text
Abstract:
AbstractDissolution of feldspar and mica and precipitation of kaolinite require a through flow of meteoric water to remove cations such as Na+ and K+ and silica. Compaction driven pore-water flow is in most cases too slow to be significant in terms of transport of solids. The very low solubility of A1 suggests that precipitation of new authigenic clay minerals requires unstable Al-bearing precursor minerals. Chlorite may form diagenetically from smectite and from kaolinite when a source of Fe and Mg is present. In the North Sea Basin, the main phase of illite precipitation reducing the quality of Jurassic reservoirs occurs at depths close to 4 km (130-140°C) but the amount of illite depends on the presence of both kaolinite and K-feldspar. Clay mineral reactions in shales and sandstones are very important factors determining mechanical and chemical compaction and are thus critical for realistic basin modelling.
APA, Harvard, Vancouver, ISO, and other styles
33

Li, Pei Hao, and Wen Jun Qu. "Remediation of Historic Buildings and Patrimony by Bacterially Induced Mineralization." Advanced Materials Research 133-134 (October 2010): 1253–58. http://dx.doi.org/10.4028/www.scientific.net/amr.133-134.1253.

Full text
Abstract:
Laboratory experiments were conducted to protect and consolidate historic architectural heritages by bacterially induced carbonate mineralization on the surface of samples of marble and concrete. Some properties of samples and mineral, such as the composition and growth of the mineral deposited on samples, porosity or pore size distribution of samples, the efficiency of protection, the bond behavior between the deposited mineral and substratum, were analyzed by X-ray diffraction, scanning electron microscopy, mercury intrusion porosimetry and ultrasonic test. The results show that the phases of mineral crystal are calcite and vaterite, and the calcium source has an effect on the phase of calcium carbonate mineralization and precipitation. Bacteria act as nucleation sites in the course of precipitation of the mineral crystallization, and the crystal is deposited uniformly on the surface and subsurface of the matrix. The precipitation has no significant effect on the pore size distribution of the matrix, but results in a decrease of porosity, and mineral crystals are strongly attached to the substratum. Bacterial mineralization for remediation of historic buildings can be an ecological and novel alternative to traditional techniques.
APA, Harvard, Vancouver, ISO, and other styles
34

Glasauer, S., S. Langley, and T. J. Beveridge. "Sorption of Fe (Hydr)Oxides to the Surface of Shewanella putrefaciens: Cell-Bound Fine-Grained Minerals Are Not Always Formed De Novo." Applied and Environmental Microbiology 67, no. 12 (December 1, 2001): 5544–50. http://dx.doi.org/10.1128/aem.67.12.5544-5550.2001.

Full text
Abstract:
ABSTRACT Shewanella putrefaciens, a gram-negative, facultative anaerobe, is active in the cycling of iron through its interaction with Fe (hydr)oxides in natural environments. Fine-grained Fe precipitates that are attached to the outer membranes of many gram-negative bacteria have most often been attributed to precipitation and growth of the mineral at the cell surface. Our study of the sorption of nonbiogenic Fe (hydr)oxides revealed, however, that large quantities of nanometer-scale ferrihydrite (hydrous ferric oxide), goethite (α-FeOOH), and hematite (α-Fe2O3) adhered to the cell surface. Attempts to separate suspensions of cells and minerals with an 80% glycerin cushion proved that the sorbed minerals were tightly attached to the bacteria. The interaction between minerals and cells resulted in the formation of mineral-cell aggregates, which increased biomass density and provided better sedimentation of mineral Fe compared to suspensions of minerals alone. Transmission electron microscopy observations of cells prepared by whole-mount, conventional embedding, and freeze-substitution methods confirmed the close association between cells and minerals and suggested that in some instances, the mineral crystals had even penetrated the outer membrane and peptidoglycan layers. Given the abundance of these mineral types in natural environments, the data suggest that not all naturally occurring cell surface-associated minerals are necessarily formed de novo on the cell wall.
APA, Harvard, Vancouver, ISO, and other styles
35

Shirokova, L. S., V. Mavromatis, I. Bundeleva, O. S. Pokrovsky, P. Bénézeth, C. Pearce, E. Gérard, S. Balor, and E. H. Oelkers. "Can Mg isotopes be used to trace cyanobacteria-mediated magnesium carbonate precipitation in alkaline lakes?" Biogeosciences Discussions 8, no. 4 (July 8, 2011): 6473–517. http://dx.doi.org/10.5194/bgd-8-6473-2011.

Full text
Abstract:
Abstract. The fractionation of Mg isotopes was determined during the cyanobacterial mediated precipitation of hydrous magnesium carbonate precipitation in both natural environments and in the laboratory. Natural samples were obtained from Lake Salda (SE Turkey), one of the few modern environments on the Earth's surface where hydrous Mg-carbonates are the dominant precipitating minerals. This precipitation was associated with cyanobacterial stromatolites which were abundant in this aquatic ecosystem. Mg isotope analyses were performed on samples of incoming streams, groundwaters, lake waters, stromatolites, and hydromagnesite-rich sediments. Laboratory Mg carbonate precipitation experiments were conducted in the presence of purified Synechococcus sp cyanobacteria that were isolated from the lake water and stromatolites. The hydrous magnesium carbonates nesquehonite (MgCO3·3H2O) and dypingite (Mg5(CO3)4(OH)25(H2O)) were precipitated in these batch reactor experiments from aqueous solutions containing either synthetic NaHCO3/MgCl2 mixtures or natural Lake Salda water, in the presence and absence of live photosynthesizing Synechococcus sp. Bulk precipitation rates were not to affected by the presence of bacteria when air was bubbled through the system. In the stirred non-bubbled reactors, conditions similar to natural settings, bacterial photosynthesis provoked nesquehonite precipitation, whilst no precipitation occurred in bacteria-free systems in the absence of air bubbling, despite the fluids achieving a similar or higher degree of supersaturation. The extent of Mg isotope fractionation (Δ26Mgsolid-solution) between the mineral and solution in the abiotic experiments was found to be identical, within uncertainty, to that measured in cyanobacteria-bearing experiments, and ranges from −1.4 to −0.7 ‰. This similarity refutes the use of Mg isotopes to validate microbial mediated precipitation of hydrous Mg carbonates.
APA, Harvard, Vancouver, ISO, and other styles
36

Patton, Roy L., Keith F. Jensen, and George A. Schier. "Responses of red spruce seedlings to ozone and acid deposition." Canadian Journal of Forest Research 21, no. 9 (September 1, 1991): 1354–59. http://dx.doi.org/10.1139/x91-191.

Full text
Abstract:
Red spruce (Picearubens Sarg.) seedlings were treated with ozone and simulated acid precipitation to determine the effects of these pollutants on growth, nonstructural carbohydrates, and foliar mineral content. One-year-old seedlings were fumigated with ozone (at 0.15 μL/L for 6 h/d or at 0.15 μL/L for 6 h/d plus 0.07 μL/L for 18 h/d) and treated with simulated precipitation (pH 3.5, 4.0, or 4.5) for up to 28 weeks. Seedlings were harvested at 7-week intervals. Ozone had no effect on growth, and precipitation acidity affected only terminal length. Carbohydrate pools were altered little by the ozone and precipitation treatments. Of eight minerals tested, only Ca was affected by precipitation acidity and only P and Cu were affected by ozone. The results of this experiment show that red spruce seedlings that receive ample supplies of water and nutrients are tolerant to ozone and changes in precipitation acidity.
APA, Harvard, Vancouver, ISO, and other styles
37

itha, C., Sarayu, K, Shreenidhi, K. S. ,. Nived. "Investigation on Bio-Mineral Precipitation-Mimicking the Natural Phenomenon." International Journal of Innovative Research in Science, Engineering and Technology 4, no. 5 (May 15, 2015): 2793–800. http://dx.doi.org/10.15680/ijirset.2015.0405020.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Mackenzie, Patricia D., David P. Horney, and Timothy M. Sivavec. "Mineral precipitation and porosity losses in granular iron columns." Journal of Hazardous Materials 68, no. 1-2 (August 1999): 1–17. http://dx.doi.org/10.1016/s0304-3894(99)00029-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Hamdan, N., and E. Kavazanjian. "Enzyme-induced carbonate mineral precipitation for fugitive dust control." Géotechnique 66, no. 7 (July 2016): 546–55. http://dx.doi.org/10.1680/jgeot.15.p.168.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Callahan, Owen A., Peter Eichhubl, and Nicholas C. Davatzes. "Mineral precipitation as a mechanism of fault core growth." Journal of Structural Geology 140 (November 2020): 104156. http://dx.doi.org/10.1016/j.jsg.2020.104156.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Hamdan, Nasser, Edward Kavazanjian, Bruce E. Rittmann, and Ismail Karatas. "Carbonate Mineral Precipitation for Soil Improvement Through Microbial Denitrification." Geomicrobiology Journal 34, no. 2 (August 4, 2016): 139–46. http://dx.doi.org/10.1080/01490451.2016.1154117.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Timakova, E. V., T. A. Udalova, and Yu M. Yukhin. "Precipitation of bismuth(III) salicylates from mineral acid solutions." Russian Journal of Inorganic Chemistry 54, no. 6 (June 2009): 873–80. http://dx.doi.org/10.1134/s0036023609060096.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

OISHI, Yoshiki, Shintaro MIYAMOTO, Hiroshi MINAGAWA, and Makoto HISADA. "STUDY ON PRECIPITATION MECHANISM OF ETTRINGITE AS SECONDARY MINERAL." Cement Science and Concrete Technology 71, no. 1 (2017): 117–24. http://dx.doi.org/10.14250/cement.71.117.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Patwardhan, Samarth D., Deepak Singh, Rockey Abhishek, and Govindarajan Suresh Kumar. "Modelling of mineral precipitation in fractures with variable aperture." ISH Journal of Hydraulic Engineering 23, no. 2 (November 9, 2016): 203–11. http://dx.doi.org/10.1080/09715010.2016.1241725.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Krebs, R., M. Sardin, and D. Schweich. "Mineral dissolution, precipitation, and ion exchange in surfactant flooding." AIChE Journal 33, no. 8 (August 1987): 1371–78. http://dx.doi.org/10.1002/aic.690330814.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Cooke, A. J., R. K. Rowe, B. E. Rittmann, J. VanGulck, and S. Millward. "Biofilm Growth and Mineral Precipitation in Synthetic Leachate Columns." Journal of Geotechnical and Geoenvironmental Engineering 127, no. 10 (October 2001): 849–56. http://dx.doi.org/10.1061/(asce)1090-0241(2001)127:10(849).

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Bradbury, Harold J., Kathryn H. Halloran, Chin Yik Lin, and Alexandra V. Turchyn. "Calcium isotope fractionation during microbially induced carbonate mineral precipitation." Geochimica et Cosmochimica Acta 277 (May 2020): 37–51. http://dx.doi.org/10.1016/j.gca.2020.03.014.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Haug, T. A., I. A. Munz, and R. A. Kleiv. "Importance of dissolution and precipitation kinetics for mineral carbonation." Energy Procedia 4 (2011): 5029–36. http://dx.doi.org/10.1016/j.egypro.2011.02.475.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Silva, Igor, and Flávia Baga. "ANÁLISE DOS DEPÓSITOS DE LATERITAS NIQUELÍFERAS DO BRASIL A PARTIR DO CONCEITO DE SISTEMAS MINERAIS HOLÍSTICOS." Estudos Geológicos 30, no. 1 (December 17, 2020): 79–99. http://dx.doi.org/10.18190/1980-8208/estudosgeologicos.v30n1p79-99.

Full text
Abstract:
The concept of mineral system, which interprets mineral deposits in relation to terrestrial dynamics, is currently used to interpret the genesis of deposits holistically, being an important tool for mineral research. In this sense, the present work makes an interpretation of nickel laterite according to the precepts of mineral systems and points out potential areas for further research in Brazil. One of the main sources of nickel comes from minerals formed by surface changes of ultramafic rocks submitted to tropical climates and relative tectonic stability, with several potential regions in Brazil. The best protoliths that are registered in Brazil are stratiform ultramafic-mafic complexes. However, the ophiolitic complexes associated with the Precambrian mobile belts, correspond to an important geotectonic environment that can host significant deposits. Practically all Brazilian protoliths are serpentinized, a process that supported the precipitation and accumulation of nickel dissolved in a supergenic environment. In term of geomorphology, the lateritization profile is closely related to plane surfaces. In most Brazilian nickeliferous laterites, paleobioclimatic conditions submitted the primary silicates with ultramafic nickel, exhumed by planing surfaces, to chemical weathering, and hydrolysis, forcing the precipitation of Ni-goethite (oxidized level) and subsequently to dissolution, reprecipitation and formation of 'garnieritas' (silicate level).
APA, Harvard, Vancouver, ISO, and other styles
50

Ma, Zhi Yuan, Hua Yan, Xin Zhou, and Chen Hou. "Impact of Carbonate Scaling on the Efficiency of Used Geothermal Water Reinjection from Low-Middle Temperature Geothermal Fluid in Xianyang Porous Geothermal Field, NW China." Advanced Materials Research 614-615 (December 2012): 307–10. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.307.

Full text
Abstract:
In low-middle temperature porous geothermal field, precipitation of carbonate from solution to form carbonate scale is confirmed as the main obstacle to efficient reinjection from the used hot fluids in Xianyang city, NW China. The carbonate deposits cause operational problems and may even clog pipeline and reinjection drillholes. For this reason, it's important to understand how impact of carbonate precipitation on the second-hand geothermal water before reinjection has been operated, which concern sustainable utilization of the geothermal water in Xianyang, the famous porous geothermal field in China. In this paper, firstly, different possible minerals precipitation from used geothermal fluid were discussed, and carbonate scaling was regarded as mineral for chemical clog by using combined with lab and chemical simulation method. Secondly, the key impacts of carbonate scaling on clog in reinjection holes such as temperature, degassing, pH, mixing, mineralization were demonstrated based on coupled simulation both in lab experiment and theoretical method. Lastly, the distribution of carbonate scaling and its degree in study area were calculated. The results show that, as the main mineral for precipitation, carbonate exist in most thermal-water wells of study area with the minor or medium scaling, and the carbonate scaling vary increasingly from bottom to top in a single reinjection drillhole, north to south in the study area. According to mineral-dissolution-precipitation equilibrium calculation carbonate saturated tend growth with the temperature and pH increases in study area. The influence of mineralization on carbonate clog is different, common-ion effect in the south of study area is given priority, but in the north salt effect is showed main effect. The analysis for impacts on carbonate clog reflect that carbonate deposit effect are very complicated, which interact each other.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Mineral precipitation' for other source types:
Dissertations / Theses
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