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Ekström, Tomas. "Leaching of concrete : the leaching process and its effects /". Lund : Univ, 2003. http://www.byggnadsmaterial.lth.se/.
Pełny tekst źródłaBarbosa, Filho Olavo. "Thiocyanate leaching of gold". Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46663.
Pełny tekst źródłaTrejo-Gallardo, Jaime. "Modeling chalcopyrite leaching kinetics". Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/240.
Pełny tekst źródłaMunkondya, Ferguson Mukozoke. "Kinetic modelling of leaching". Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47583.
Pełny tekst źródłaSililo, Bernard Liswani. "Modelling uranium leaching kinetics". Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/61336.
Pełny tekst źródłaDissertation (MSc)--University of Pretoria, 2016.
Materials Science and Metallurgical Engineering
MSc
Unrestricted
Watson, Jack. "Leaching for Maintenance: Factors to Consider for Determining the Leaching Requirement for Crops (AZ". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/146964.
Pełny tekst źródłaAs a result of the application of irrigation water containing soluble salts, a salt load is continually added to the soil. Soil salts have to be removed on an ongoing basis through maintenance leaching to prevent yield losses from a salinity buildup. This publication provides factors to consider for determining the leaching requirement for crops.
Tavakolikhaledi, Mohammadreza. "Vanadium : leaching and solvent extraction". Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46814.
Pełny tekst źródłaHill, Annette Rosemary. "Leaching of alternative pavement materials". Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410354.
Pełny tekst źródłaDubus, Igor G. "Calibration of pesticide leaching models". Thesis, Cranfield University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269528.
Pełny tekst źródłaMay, Noelene. "The ferric leaching of pyrite". Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/17952.
Pełny tekst źródłaThe bioleaching of pyrite has been found to occur via an indirect mechanism. Ferric iron leaches the pyrite, and is reduced to ferrous iron. Bacteria such as Thiobacillus ferrooxidans oxidise the ferrous iron to ferric iron, thus maintaining a high redox potential. In this thesis, the effect of the redox potential on the ferric leach rate was investigated by examining previously published data and by developing an experimental technique where dynamic redox potential measurements were used to study the kinetics of the sub-process. The ferric leach rate of pyrite was found to be of the order of 5 x 10⁻⁷ moles pyrite per mole pyrite per second, which is of the same order of magnitude as rates reported for the bioleaching of pyrite over similar ranges of redox potential. The rate decreased as the redox potential decreased, in what appeared to be a Butler-Volmer-like manner. This, along with the observation that there was no significant effect of the total iron concentration, suggested the likelihood of an electrochemical mechanism being operative, with charge transfer at the pyrite surface being rate limiting.
Albertani, Bryce Martin. "The leaching of α-spodumene". Thesis, Albertani, Bryce Martin (2018) The leaching of α-spodumene. Honours thesis, Murdoch University, 2018. https://researchrepository.murdoch.edu.au/id/eprint/44868/.
Pełny tekst źródłaParker, Gretel Kristen. "Spectroelectrochemical investigation of chalcopyrite leaching". Thesis, Griffith University, 2006. http://hdl.handle.net/10072/365971.
Pełny tekst źródłaThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Science
Full Text
Dyson, Devy Alexander William. "Modeling the kinetics of the zinc pressure leaching process - oxidative sphalerite leaching in sulphuric acid media". Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63409.
Pełny tekst źródłaApplied Science, Faculty of
Materials Engineering, Department of
Graduate
Marshall, Miles Ramsvik. "Spatial variablity and pesticide leaching : measurement and modelling the hydrodynamic aspects of pesticide leaching in soils". Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402812.
Pełny tekst źródłaGashier, Wail. "Accelerated leaching methods for cementitious nuclear wasteforms and the impact of superplasticisers on the leaching behaviour". Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12266/.
Pełny tekst źródłaGarlapalli, Ravinder Kumar. "Leaching of chalcopyrite with sodium hypochlorite". Morgantown, W. Va. : [West Virginia University Libraries], 2010. http://hdl.handle.net/10450/11213.
Pełny tekst źródłaTitle from document title page. Document formatted into pages; contains vii, 47 p. : ill. Includes abstract. Includes bibliographical references (p. 46-47).
Lázaro-Báez, María Isabel. "Electrochemistry of the leaching of chalcopyrite". Murdoch University, 2001. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20060817.125248.
Pełny tekst źródłaXia, Chen. "Thiosulphate stability in gold leaching process". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ59414.pdf.
Pełny tekst źródłaLázaro-Báez, María Isabel. "Electrochemistry of the leaching of chalcopyrite /". Access via Murdoch University Digital Theses Project, 2001. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20060817.125248.
Pełny tekst źródłaNdlovu, Sehliselo. "Bacterial leaching of pyrite single crystals". Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401694.
Pełny tekst źródłaAndac, M. "Leaching of cement-stabilised solid waste". Thesis, University of Aberdeen, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.592062.
Pełny tekst źródłaAl-Omeiri, Saeed S. "Leaching of copper-refined anode slime". Thesis, University of Strathclyde, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435125.
Pełny tekst źródłaCai, Liping. "CFD modelling of chalcopyrite heap leaching". Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/44559.
Pełny tekst źródłaCarter, E. Thomas Jr. "Risk assessment formulation for nitrate leaching". Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/40347.
Pełny tekst źródłaDominguez, Kimberly. "Leaching of Silver Nanoparticles from Textiles". Ohio University Art and Sciences Honors Theses / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ouashonors155690445799457.
Pełny tekst źródłaAbrahamsson, Filip. "Leaching of Pyrrhotite from Nickel Concentrate". Thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-64934.
Pełny tekst źródłaIcke-oxidativ syralakning av magnetkis från Kevitsas Ni-koncentrat har studerats samt metoder för tillvaratagande av biprodukter. Genom en selektiv upplösning av magnetkis (Fe1-xS, 0<x<0.25) kan värdefulla metaller som Ni och Co anrikas i det slutliga koncentratet. Samtidigt som mängden Fe och S som skickas till smältverken minskar, vilket också innebär att mindre biprodukter i form av slagg och SO2 erhålls vid den pyrometallurgiska smältningen av Ni-koncentratet. En experimentell design plan genomfördes för att studera lakningen där syrakoncentrationen varierades från 38.8% till 57.8%H2SO4 och temperatur från 60 till 100°C. Bäst resultat erhölls vid de lägre parameterinställningarna. Lakning vid 60°C med en initial syrakoncentration på 38.8%H2SO4 visade sig vara tillräcklig för att selektivt lösa upp merparten av all magnetkis och lämna kvar en anrikad produkt. Via QUEMSCAN bekräftades att merparten av all magnetkis hade löst upp sig och att huvudsakligt Ni-mineral fortfarande var pentlandit. Kemiska analyser visade att mer än 95% av Ni, Co och Cu stannade kvar i fasta godset. Den tillämpade lakningsmetoden genererar biprodukter i form av stora mängder Fe2+ i lösning och H2S i gasform. För att tillvarata Fe2+ har kristallisering av laklösning som järn(ii) sulfat (FeSO4∙nH2O) studerats genom kylning. De kristalliserade kristallerna avvattnades till monohydrat, FeSO∙1H2O, genom avvattning i stark svavelsyra (80%H2SO4). XRD bekräftade FeSO∙1H2O som huvudfas i slutliga kristallerna och kemisk analys visade på ca 30%Fe med huvudsakliga orenheter i form av 1.5% Mg, 0.4%Ca och 0.2% Ni. Möjligheten till att laka i återcirkulerad lösning efter kristallisering har undersökts. Lakning i återcirkulerad lösning visade inga negativa effekter då liknande halter och utbyten erhölls till det fasta godset.
Carter, E. Thomas. "Risk assessment formulation for nitrate leaching /". This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11182008-063039/.
Pełny tekst źródłaLazaro-Baez, Maria Isabel. "Electrochemistry of the leaching of chalcopyrite". Thesis, Lazaro-Baez, Maria Isabel (2001) Electrochemistry of the leaching of chalcopyrite. PhD thesis, Murdoch University, 2001. https://researchrepository.murdoch.edu.au/id/eprint/147/.
Pełny tekst źródłaLazaro-Baez, Maria Isabel. "Electrochemistry of the leaching of chalcopyrite". Lazaro-Baez, Maria Isabel (2001) Electrochemistry of the leaching of chalcopyrite. PhD thesis, Murdoch University, 2001. http://researchrepository.murdoch.edu.au/147/.
Pełny tekst źródłaSitando, Onias. "Gold Leaching in Thiosulfate-Oxygen Solutions". Thesis, Sitando, Onias (2017) Gold Leaching in Thiosulfate-Oxygen Solutions. PhD thesis, Murdoch University, 2017. https://researchrepository.murdoch.edu.au/id/eprint/38239/.
Pełny tekst źródłaMuslim, Abrar. "Thiosulfate leaching process for gold extraction". Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/896.
Pełny tekst źródłaMcGinnity, Justin. "Sulfur dioxide leaching of zinc sulfide". Thesis, Curtin University, 2001. http://hdl.handle.net/20.500.11937/1033.
Pełny tekst źródłaMcGinnity, Justin. "Sulfur dioxide leaching of zinc sulfide". Curtin University of Technology, Department of Applied Chemistry, 2001. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=12896.
Pełny tekst źródłaat low ZnS pulp density (0.5 g L-1), the rate of ZnS dissolution in sulfuric acid increased due to the removal of H2S(aq) by reaction with S02(aq) or HS03-(aq). However the increase in rate was much less than that expected for the complete removal of H2S(aq). As with leaches of ZnS in sulfurous acid at ambient temperature, the inhibition was not attributable to the presence of residual H2S(aq) or to occlusion of unreacted ZnS by elemental sulfur, but is thought to be due to aqueous species that are like "H2S", in that they may react with Zn2+ to reprecipitate W.To this end, sulfane monosulfonates have again been postulated. The rate of ZnS dissolution, under conditions of low pulp density, was independent Of S02 concentration, suggesting that under these conditions the rate of the H2S / S02 reaction is also independent of the S02 concentration.At higher pulp densities (200 g L-1), similar to those expected in an industrial application, synthetic zinc sulfide leached rapidly in H2S04 / S02 solutions to approximately 60% zinc extraction, but was then inhibited by the large amounts of sulfur that formed. These caused agglomerates of zinc sulfide and elemental sulfur to form, even at temperatures below the melting point of sulfur, reducing the surface area of zinc sulfide available for reaction.Leaches of zinc concentrate at low pulp densities in H2S04 / S02 solutions and at temperatures above sulfur's meting point, were inhibited by the formation of molten sulfur. In contrast to synthetic zinc sulfide, zinc concentrate is readily wet by molten sulfur. Three surfactants orthophenylenediamine, quebracho and sodium ligninsulfonate were found to be reasonably effective in preventing molten sulfur from occluding the mineral surface. At high pulp densities, the H2S04 / S02 leach solution was unable to effect, the extraction of zinc from a zinc concentrate beyond approximately ++
10%.Integral S02 / H2S04 leaching of zinc concentrate was found not to be a commercial prospect. However, sidestream processing of zinc concentrate in an acid leach stage followed by reaction of generated H2S with S02 from the roasting stage to produce elemental sulfur may be viable.
Lee, Aik Heng. "Prediction of pollutant leaching from landfill". Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/2182.
Pełny tekst źródłaKaya, Serif. "High Pressure Acid Leaching Of Turkish Laterites". Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612896/index.pdf.
Pełny tekst źródłardes lateritic nickel and cobalt ore by means of sulphuric acid leaching under high temperature and high pressure conditions.The high pressure acid leach (HPAL) experiments were conducted with nontronitic and limonitic types of Gö
rdes lateritic nickel ore, respectively. Leaching experiments of nontronite ore have shown that almost all of the nickel and cobalt contained in the nontronitic ore were easily extracted into the (PLS). Therefore, the rest of the experiments were concentrated on difficult to leach limonitic sample when compared with the nontronitic one, and higher nickel and cobalt extractions were aimed to be obtained. By taking economic and technical considerations into account, the basic (HPAL) process parameters for the limonitic sample were optimized as
leaching at 255 °
C with a particle size of 100% -850 &mu
with 0.30 sulphuric acid to ore weight ratio in 1 hour of leaching duration. The experiments were conducted with 30% solids ratio and it was found that 87.3% of nickel and 88.8% of cobalt present in the limonitic ore could be extracted into the pregnant leach solution. Nevertheless, these results were found to be below the desired values. Therefore, the possible reasons of this behavior were investigated and the presence of hematite mineral in the limonitic ore was found to be the most probable one. Therefore, in order to dissolve the nickel and cobalt present in the hematite mineral, the additions of HCl, ferrous ions, cuprous ions and sulphur were tried, respectively and they were found to be beneficial in order to increase the degree of nickel and cobalt extractions.
George, Anthe. "The leaching properties of co-combustion residues". Thesis, Imperial College London, 2005. http://hdl.handle.net/10044/1/12027.
Pełny tekst źródłaBlancarte-Zurita, Martha Alicia. "Controlled redox potential microbiological leaching of chalcopyrite". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28627.
Pełny tekst źródłaApplied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate
Rademan, Johan Andries Muller. "The simulation of a transient leaching circuit". Thesis, Link to the online version, 1995. http://hdl.handle.net/10019/3146.
Pełny tekst źródłaStenemo, Fredrik. "Vulnerability assessments of pesticide leaching to groundwater /". Uppsala : Dept. of Soil Sciences, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200757.pdf.
Pełny tekst źródłaTorstensson, Gunnar. "Nitrogen availability for crop uptake and leaching /". Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1998. http://epsilon.slu.se/avh/1998/91-576-5507-3.gif.
Pełny tekst źródłaOnal, Mehmet Ali Recai. "Pressure Leaching Of Caldag Lateritic Nickel Ore". Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615480/index.pdf.
Pełny tekst źródłaaldag lateritic nickel ore. In order to extract nickel and cobalt values into pregnant leach solution (PLS), several process parameters of HPAL including acid load, temperature, leaching duration and particle size were investigated in comparative manner at constant solid concentration and agitation speed. After HPAL trials, it has been found that more than one combination of parameters offered higher than 90% extraction efficiencies for both nickel and cobalt. Among them, 0.325 kg/kg acid load, 250°
C, 1 hour duration and 100% -1 mm particle size was selected as the optimum conditions with 94.1% Ni and 94.0% Co extractions. A stock of PLS was prepared under the stated conditions that was treated by downstream operations in order to obtain MHP. Initially by two-stage iron removal of downstream operations major impurities iron, chromium and aluminum were nearly completely removed with acceptable nickel and cobalt losses from PLS. Then, the nickel and cobalt were precipitated by two-stage mixed hydroxide precipitation. In the first step of MHP, the optimum conditions were chosen as pH=7.10, 60°
C and 1 hour duration. The intermediate product obtained at these conditions contained 44.3% Ni, 3.01% Co with 3.06% Mn contamination. In summary, it was found that Ç
aldag nickel laterite ore was readily leachable under HPAL conditions and PLS obtained was easily treatable in order to produce saleable MHP.
Parada, Torres Fernando Andrés. "The alkaline sodium sulphide leaching of enargite". Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/34016.
Pełny tekst źródłaZaayman, Yolande. "Leaching kinetics of synthetic heazlewoodite / Y. Zaayman". Thesis, North-West University, 2004. http://hdl.handle.net/10394/646.
Pełny tekst źródłaThesis (M.Sc. (Chemistry))--North-West University, Potchefstroom Campus, 2005.
MacArthur, Andrew. "Electrically accelerated leaching of simulated cementitious wasteforms". Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/19959/.
Pełny tekst źródłaLok, Jonathan Y. "Acid Leaching of SHS Produced MgO/TiB2". Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/35366.
Pełny tekst źródłaMaster of Science
Hirato, Tetsuji. "Studies on the Oxidative Leaching of Chalcopyrite". Kyoto University, 1986. http://hdl.handle.net/2433/74697.
Pełny tekst źródłaWatson, Jack. "Leaching for Reclamation (AZ Water Series #23)". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/144697.
Pełny tekst źródłaWhen salts build up in soil, they have to be removed to allow for plant growth. The amount of water required to accomplish this task depends upon the method of water application, the initial salinity of the soil, the final soil salinity desired, and the quality of the irrigation water. This publication provides the soil and water analysis for leaching salts from soil.
Lim, Hazel. "Leaching of Rare Earths from Eudialyte Minerals". Thesis, Curtin University, 2019. http://hdl.handle.net/20.500.11937/75841.
Pełny tekst źródłaVu, Quoc Hung. "Modelling pollutants leaching from recycled construction materials". Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/130795/1/Quoc%20Hung_Vu_Thesis.pdf.
Pełny tekst źródłaVann, Kevin N. "Leaching behavior of personal computer central processing units (CPUs) using standardized and modified toxicity characteristic leaching procedure (TCLP) tests". [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001149.
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