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Perry, Meghan Rose. "Arsenic, antimony and visceral leishmaniasis". Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/14edf50b-4943-4ec8-8556-8aaecf3a9f49.
Pełny tekst źródłaAndrewes, Paul. "Arsenic and antimony biomethylation by Scopulariopsis brevicaulis". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0009/NQ56494.pdf.
Pełny tekst źródłaKoch, Iris. "Arsenic and antimony species in the terrestrial environment". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ34566.pdf.
Pełny tekst źródłaShaikh, Taimur A. "NEW DEVELOPMENTS IN CYCLIZED ARSENIC AND ANTIMONY THIOLATES". UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/494.
Pełny tekst źródłaCollins, Helen. "Halide transfer reactions of arsenic, antimony and bismuth". Thesis, University of Warwick, 1991. http://wrap.warwick.ac.uk/108064/.
Pełny tekst źródłaJunk, Margrit. "Material properties of copper alloys containing arsenic, antimony, and bismuth". Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2009. http://nbn-resolving.de/urn:nbn:de:swb:105-1299566.
Pełny tekst źródłaFrancis, M. D. "Studies of low co-ordinate phosphorus, arsenic and antimony compounds". Thesis, Swansea University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637005.
Pełny tekst źródłaGaÌl, Judit M. "Biogeochemistry of arsenic and antimony : risk assessment in mining areas". Thesis, University of the West of Scotland, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430897.
Pełny tekst źródłaRouwane, Asmaa. "Mobilité de l'Arsenic (As) et l'antimoine (Sb) d'origine géogénique dans un sol hydromorphe d'une zone humide agricole". Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0103.
Pełny tekst źródłaIn this study, we evaluated the effect of i) solid-phase distribution and ii) biophysico–chemical factors (redox potential (Eh), competing anions, microbial activity, organic matter (OM)) on the mobility of arsenic (As) and antimony (Sb) in an agricultural wetland soil. For that, we first performed a physico–chemical monitoring of wetland porewater (field scale) then we conducted controlled batch incubations of the wetland soil (0–20/30 cm) (batch scale). The solid–phase distribution of As and Sb in wetland soil was also performed at different soil depths (0–130 cm). We showed that the highest As content was found in the upper soil layers (0–40 cm) with a preferential association to “amorphous” oxyhydroxydes (59% of total As) in presence of high levels of OM. Under reducing conditions, As was highly solubilized at both field and batch scale (up to 20% of the total As content) which was induced by i) the dissolution of Fe/Mn oxyhydroxides enhanced by soil microbial activity and ii) As(V) reduction into As(III) (very mobile specie). On the other hand, Sb mobilization was enhanced under oxidizing conditions at field scale (up to 5 μg.L–1) with the concomitant occurrence of dissolved OM (up to 93 mg.L–1) and was rather limited under reducing conditions (<3% of the total Sb content; 0.2 μg.L–1 at field scale and up to 1.5 μg.L–1 at batch scale). The mobility behavior of Sb was attributed to i) the dissolution of Fe/Mn oxyhydroxides catalyzed by microbial activity, ii) the possible occurrence of Sb in its less mobile form (Sb(III)) under reducing conditions and iii) probable DOM–induced mobilization under oxidizing conditions. Under reducing conditions, the addition of nitrate (50 mg.L–1) and phosphate (20 mg.L–1) to wetland soil, enhanced As and Sb mobilization by factors of 2.3 and 1.6 which was suggested to be caused by the combined competing effect of phosphate and hydrogenocarbonate ions; the latter one resulting from a possible enhanced microbial activity
Akagi, Susumu 1954. "Thermochemical nature of arsenic, antimony and bismuth in copper smelting matte". Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276743.
Pełny tekst źródłaCangelosi, Virginia May 1982. "Supramolecular coordination chemistry of phosphorus, arsenic, antimony, and bismuth with organothiolates". Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/11301.
Pełny tekst źródłaThe ever-expanding field of supramolecular chemistry has recently incorporated use of the main group ions. This dissertation presents a supramolecular approach to the coordination chemistry of the Group 15 elements, with a special emphasis on arsenic (As). Arsenic is ubiquitous in our environment, contaminates the drinking water of large human populations, and is a worldwide health concern. Arsenic's legendary toxicity is thought to be due to its thiophilicity and the stability of arsenic-thiolate bonds within proteins. Chapter I is a review of the current literature on the kinetics, thermodynamics, and supramolecular chemistry of the As(III)-thiolate bond and reveals that the stability and lability of the bond make it well-suited for supramolecular chemistry. The remainder of the dissertation explains our supramolecular design strategies for the As(III) ion with thiolate ligands, then expands the approach to the Group 15 elements phosphorus, antimony, and bismuth. Chapter II presents an approach to controlling diastereoselectivity in the self-assembly of supramolecular As 2 L 2 Cl 2 macrocycles using intramolecular steric interactions. Chapter III expands upon this approach by using intermolecular steric interactions to control diastereoselectivity and dimer formation of As 2 L 2 Cl 2 macrocycles. Chapter IV gives insight into the self-assembly of these As 2 L 2 Cl 2 macrocycles by identifying several reaction intermediates and kinetic mistakes that form during the course of the reaction. In Chapter V the application of our design strategy to the heavier Group 15 elements of antimony and bismuth is shown through the presentation of E 2 L 3 cryptands (E = As, Sb, Bi). Additionally, a Group 15 "transmetallation" reaction is explained which allows, for the first time, the preparation of the elusive P 2 L 3 cryptand. Chapter VI further examines the transmetallation reaction, the solution isomerism of the E 2 L 3 cryptands, and presents three heterometallic EE'L 3 cryptands. Finally, Chapter VII briefly concludes this dissertation and provides some potential future directions for the project. This dissertation includes co-authored material and previously published results.
Committee in charge: James Hutchison, Chairperson, Chemistry; Darren Johnson, Member, Chemistry; Catherine Page, Member, Chemistry; Michael Haley, Member, Chemistry; Scott Bridgham, Outside Member, Biology
Yersel, Müşerref Eroğlu Ahmet E. thesis advisor. "Separation of trace antimony and arsenic prior to hydride generation atomic absortion spectrometric determination/". [s.l.]: [s.n.], 2005. http://library.iyte.edu.tr/tezler/master/kimya/T000392.pdf.
Pełny tekst źródłaCampbell, Andrew Thomas. "Some aspects of the aquatic and analytical chemistry of antimony and arsenic". Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357182.
Pełny tekst źródłaFlynn, H. C. "Biosensor assessment of arsenic and antimony bioavailability in mining soils and sediments". Thesis, University of Aberdeen, 2003. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU180551.
Pełny tekst źródłaMartinez, Marino Juan. "Evaluation of gallium arsenic(x) antimony(1-x)/indium(y) aluminum(1-y) arsenicp-channel HIGFETs for complementary technologies". Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186496.
Pełny tekst źródłaCai, Jie. "Identification and characterization of a chromosomal arsenic/antimony inducible operon in gram-negative bacteria". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/NQ44376.pdf.
Pełny tekst źródłaChalmers, Brian Alexander. "A synthetic, spectroscopic and structural examination of phosphorus, arsenic and antimony peri-substituted acenaphthenes". Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/7061.
Pełny tekst źródłaSeyedi, Seyed Mojtaba. "Engineered iron oxide nanoparticle-polymer composites for the removal of dissolved arsenic and antimony". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2017. https://ro.ecu.edu.au/theses/2038.
Pełny tekst źródłaMarmor, Joy Susan. "A mud lac amp transcriptional fusion identifies a gene induced by arsenic and antimony salts /". Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60502.
Pełny tekst źródłaUrbánková, Kristýna. "Multikomponentní extrakce a prekoncentrace mikrokoncentrací As, Sb, Se a Te na modifikovaný silikagel, stanovení na ICP-AES (ICP-MS) a aplikace na vzorky vod". Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-233280.
Pełny tekst źródłaJirak, Jason Edward. "Enhancement of minority carrier lifetime in low quality silicon by ion implantation of arsenic and antimony". [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1469707.
Pełny tekst źródłaLesley, Michael Patrick. "The fluxes and fates of arsenic, selenium, and antimony from coal fired power plants to rivers". Thesis, Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180307/unrestricted/lesley%5fmichael%5fp%5f200312%5fms.pdf.
Pełny tekst źródłaEbengue, Atega Philippe Lionel. "Vers une distinction des contributions anthropiques et naturelles dans les contaminations en arsenic et antimoine des eaux souterraines dans le cadre d’un diagnostic territorial : application au bassin cévenol, France". Electronic Thesis or Diss., IMT Mines Alès, 2022. http://www.theses.fr/2022EMAL0002.
Pełny tekst źródłaGroundwater provides a significant proportion of the water supply of the territories.The monitoring of the reserves and quality of these resources is therefore a major issue,in line with the United Nations Sustainable Development Goals. In relation to theseobjectives, this thesis deals with the characterization of the quality of groundwaterbodies in a territory with a mining past. It aims at developing a methodology toestimate the respective contributions of the natural geochemical background andanthropogenic inputs to the enrichment of metals and metalloids in groundwater,considering simultaneously the heterogeneity of the geology and the combination ofgeological, geomorphological, tectonic and statistical factors. Quality measurementswere carried out to establish the state of arsenic and antimony concentrations in thegroundwater bodies delimited by the Gardon watershed in the Cevennes. Then, amulti-criteria aggregation operator was developed and implemented in order toproduce quantitative and qualitative maps allowing the discrimination of the naturalgeochemical background from the anthropic contributions mainly constituted by thepast mining activity. This mapping made it possible to determine remarkable focilocated in particular on the Cevennes fault and on which particular attention must bepaid in the context of territorial management of the quality of water resources. Aninteractive workshop allowed to evaluate the differences of perception of the actors ofthe territory in front of information on water quality. It highlighted the need to developadapted scientific information restitution supports in order to reach a sharedawareness of groundwater quality issues by the different actors of a territory
Junk, Margrit. "Material properties of copper alloys containing arsenic, antimony, and bismuth the material of Early Bronze Age ingot torques /". [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968751180.
Pełny tekst źródłaBorges, Elisa Moura. "Metodologia para determinação de arsênio, antimônio e bismuto por espectrometria de emissão óptica com fonte de plasma acoplado indutivamente (ICPOES) e geração de hidretos aplicada à rochas /". Rio Claro : [s.n.], 2005. http://hdl.handle.net/11449/92858.
Pełny tekst źródłaBanca: Maria Margarita Torres Moreno
Banca: Amauri Antonio Menegário
Resumo: No presente trabalho são descritas as etapas para o desenvolvimento de uma metodologia para determinação de arsênio, antimônio e bismuto em materiais geológicos, utilizando gerador de hidretos acoplado ao ICPOES, proporcionando a determinação dos elementos de interesse em baixas concentrações. O método é sensível, por isso está sujeito a interferências, como as causadas por elementos presentes na matriz. Foram realizadas otimizações nos parâmetros operacionais e analíticos do equipamento, que visaram uma melhor sensibilidade e um método eficiente de solubilização completa de amostra de rocha, que permita a determinação dos elementos de interesse em baixas concentrações. Para a etapa de validação do método foram realizados diversos ataques com adições de padrão e testes com o uso de tiouréia e iodeto de potássio com ácido ascórbico em diferentes concentrações com o objetivo de minimizar possíveis interferências presentes na matriz. Os resultados finais foram obtidos através da solubilização de materiais de referência internacionais geológicos na determinação de arsênio, bismuto e antimônio e se mostraram satisfatórios.
Abstract: In this study, the steps for the development of a methodology to the determination of arsenic, antimony and bismuth in geological materials, with the use of hydride generation and ICPOES are being described. The methodology is sensitive due to that, subject is bound to suffer interferences from matrix elements. Optimizations in operations and analyticals parameters were done in the equipment. They aimed a better sensitivite and an efficient method of complete dissolution techniques in a sample of rock, which permits the determination of the analyte in low concentrations. For the steps of methodology validation, many dissolutions were realized with the addition of standard and tests with the use of thiourea and KI and acid ascorbic in different concentrations with the objective of minimizing some interferences from matrix elements. The final results were obtained through dissolutions with international reference materials in the determination of arsenic, antimony and bismuth.
Mestre
Tavora, F. J. "Lithogeochemistry and surficial redistribution of arsenic, antimony, bismuth, selenium and tellurium, associated with mineral deposits in subtropical areas of Brazil". Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46760.
Pełny tekst źródłaQi, Pengfei [Verfasser], Thomas [Akademischer Betreuer] Pichler i Andrea [Akademischer Betreuer] Koschinsky. "Adsorption behavior of arsenic and antimony onto ferrihydrite under competitive conditions / Pengfei Qi. Betreuer: Thomas Pichler. Gutachter: Thomas Pichler ; Andrea Koschinsky". Bremen : Staats- und Universitätsbibliothek Bremen, 2016. http://d-nb.info/1084169118/34.
Pełny tekst źródłaBolanz, Ralph Michael [Verfasser], Juraj [Akademischer Betreuer] Majzlan, Georg [Akademischer Betreuer] Büchel i Gerhard [Akademischer Betreuer] Heide. "Arsenic and antimony in the environment : release and possible immobilization mechanisms / Ralph Michael Bolanz. Gutachter: Juraj Majzlan ; Georg Büchel ; Gerhard Heide". Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2014. http://d-nb.info/1047579081/34.
Pełny tekst źródłaBesold, Johannes [Verfasser], i Britta [Akademischer Betreuer] Planer-Friedrich. "Influences of Reduced Sulfur on Arsenic and Antimony Mobility and Binding to Natural Organic Matter / Johannes Besold ; Betreuer: Britta Planer-Friedrich". Bayreuth : Universität Bayreuth, 2020. http://d-nb.info/1218596236/34.
Pełny tekst źródłaJana, Ulrike. "Etude des interactions entre la plante Arabidopsis thaliana (L.) Heynh et le ver de terre Aporrectodea caliginosa (Savigny) : application à la phytoremédiation de l'arsenic et de l'antimoine". Phd thesis, Université Paris-Est, 2009. http://tel.archives-ouvertes.fr/tel-00504377.
Pełny tekst źródłaMcDonald, Lauren. "Wipe Sampling Methodologies to Assess Exposures to Metals in Urban Canadian Homes: 1 Cadmium, Lead, Yttrium 2 Antimony, Arsenic, Chromium, Copper, Nickel". Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28588.
Pełny tekst źródłaBorges, Elisa Moura [UNESP]. "Metodologia para determinação de arsênio, antimônio e bismuto por espectrometria de emissão óptica com fonte de plasma acoplado indutivamente (ICPOES) e geração de hidretos aplicada à rochas". Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/92858.
Pełny tekst źródłaCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
No presente trabalho são descritas as etapas para o desenvolvimento de uma metodologia para determinação de arsênio, antimônio e bismuto em materiais geológicos, utilizando gerador de hidretos acoplado ao ICPOES, proporcionando a determinação dos elementos de interesse em baixas concentrações. O método é sensível, por isso está sujeito a interferências, como as causadas por elementos presentes na matriz. Foram realizadas otimizações nos parâmetros operacionais e analíticos do equipamento, que visaram uma melhor sensibilidade e um método eficiente de solubilização completa de amostra de rocha, que permita a determinação dos elementos de interesse em baixas concentrações. Para a etapa de validação do método foram realizados diversos ataques com adições de padrão e testes com o uso de tiouréia e iodeto de potássio com ácido ascórbico em diferentes concentrações com o objetivo de minimizar possíveis interferências presentes na matriz. Os resultados finais foram obtidos através da solubilização de materiais de referência internacionais geológicos na determinação de arsênio, bismuto e antimônio e se mostraram satisfatórios.
In this study, the steps for the development of a methodology to the determination of arsenic, antimony and bismuth in geological materials, with the use of hydride generation and ICPOES are being described. The methodology is sensitive due to that, subject is bound to suffer interferences from matrix elements. Optimizations in operations and analyticals parameters were done in the equipment. They aimed a better sensitivite and an efficient method of complete dissolution techniques in a sample of rock, which permits the determination of the analyte in low concentrations. For the steps of methodology validation, many dissolutions were realized with the addition of standard and tests with the use of thiourea and KI and acid ascorbic in different concentrations with the objective of minimizing some interferences from matrix elements. The final results were obtained through dissolutions with international reference materials in the determination of arsenic, antimony and bismuth.
Furdíková, Zuzana. "Studium generování, záchytu a atomizace těkavých hydridů pro metody atomové spektrometrie". Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-233290.
Pełny tekst źródłaBott, Raymond C. "The Synthesis and Characterisation of Group 15 Coordination Complexes involving a-Hydroxy Carboxylic Acid Ligands". Thesis, Queensland University of Technology, 1993. https://eprints.qut.edu.au/226578/1/T%28S%29%2032_Bott_1993.pdf.
Pełny tekst źródłaFlorea, Ana-Maria. "Toxicity of alkylated derivatives of arsenic, antimony and tin in vitro cellular uptake, cytotoxicity, genotoxic effects, perturbation of Ca2+ homeostasis, and cell death /". [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973570474.
Pełny tekst źródłaDippold, Angela C. "Detailed Geochemical Investigation of the Mineralogic Associations of Arsenic and Antimony Within the Avon Park Formation, Central Florida: Implications for Aquifer Storage and Recovery". [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002992.
Pełny tekst źródłaFlorea, Ana M. [Verfasser]. "Toxicity of Alkylated Derivatives of Arsenic, Antimony, and Tin in vitro : Cellular Uptake, Cytotoxicity, Genotoxic Effects, Perturbation of Ca2+ Homeostasis, and Cell Death / Ana M Florea". Aachen : Shaker, 2005. http://d-nb.info/118161998X/34.
Pełny tekst źródłaKrejčí, Pavel. "Studium miniaturních zařízení pro kolekci hydridotvorných prvků v atomové spektroskopii". Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-233325.
Pełny tekst źródłaHaffert, Laura, i n/a. "Metalloid mobility at historic mine and industrial processing sites in the South Island of New Zealand". University of Otago. Department of Geology, 2009. http://adt.otago.ac.nz./public/adt-NZDU20090921.144328.
Pełny tekst źródłaFONTANELLA, MARIA CHIARA. "APPLICAZIONE DI DIFFERENTI TECNICHE PER LA DETERMINAZIONE DELL’ARSENICO NELLA CATENA ALIMENTARE UMANA: DALL’ACQUA DI FALDA ALLA TAVOLA". Doctoral thesis, Università Cattolica del Sacro Cuore, 2013. http://hdl.handle.net/10280/1958.
Pełny tekst źródłaThe aim of this thesis was to explore new analytical techniques as well as to carry out further characterisations of human health risks, which derive from water pollution, in particular groundwater, and food, in particular rice. The prevention of water pollution is an environmental aspect, that includes monitoring of both natural enrichment and outside pollution with routine analysis but also with new techniques, e.g. the application of passive sampling techniques and advanced technologies. The diffusive gradients in thin films (DGT) technique with ferrihydrite adsorbent, has been investigated for the accumulation of different species of Arsenic (As), like Inorganic Species (arsenite and arsenate) and Organic Arsenic (dimethylarsinic and monomethylarsenate) in aqueous matrix. To evaluate the performance of DGT method for accumulation of arsenic species, after deployment in synthetic solutions, DGT devices were carried out on groundwaters collected in six different towns in the North of Italy, where the As concentration is very high. Recently, health effects at arsenic exposures have been observed in areas where levels of inorganic As in drinking water are not excessive. Antimony (Sb) is associated to As in several studies because the physical and chemical properties of these two elements are similar, and it has been recently recognized as water contaminant. In this thesis I reported for the first time detailed performance characteristics of the Fe-oxide gel associated to DGT devices deployed in known aqueous solutions of trivalent and pentavalent Sb. Speciation analysis of Sb(III) and Sb(V) in aqueous samples was performed through extraction and on-line determination of isotope dilution concentration after a chromatographic separation. Generally rice, unlike food products of terrestrial origin, contains significant amounts of inorganic arsenic. Recently some Government Organizations (e.g. EFSA) debated the possibility to set an upper limit for total and inorganic arsenic in rice. Arsenic speciation was realized in 70 Italian rice samples from different representative cultivation conditions. The most abundant forms in rice were As(III) and DMA(V). After that, it was fundamental to investigate the localization of As in rice grains in different processes (raw, brown and milled rice with or without parboiling technique), because both speciation and distribution throughout the grain are key factors controlling bioavailability of the contaminant. The As distribution in rice grains of two varieties (Gladio and Ronaldo) from different processes, was determined by LA-ICP-MS. The distribution of As varied between the various parts of the grains (exterior, medium and interior part). During parboiling, the partial boiling of food as the first step in the cooking process, arsenic might have released from the grain to the boiling water. Thus, parboiling of rice grain may reduce the magnitude of arsenic intake in human body. Actually the As content was higher in non-parboiled rice grain than in parboiled rice. The relationship between As intensities and the different parts of rice grain revealed that As levels decreased from the external part towards the middle position, and then the intensity values seem to be similar between medium and internal part in non parboiled products.
FONTANELLA, MARIA CHIARA. "APPLICAZIONE DI DIFFERENTI TECNICHE PER LA DETERMINAZIONE DELL’ARSENICO NELLA CATENA ALIMENTARE UMANA: DALL’ACQUA DI FALDA ALLA TAVOLA". Doctoral thesis, Università Cattolica del Sacro Cuore, 2013. http://hdl.handle.net/10280/1958.
Pełny tekst źródłaThe aim of this thesis was to explore new analytical techniques as well as to carry out further characterisations of human health risks, which derive from water pollution, in particular groundwater, and food, in particular rice. The prevention of water pollution is an environmental aspect, that includes monitoring of both natural enrichment and outside pollution with routine analysis but also with new techniques, e.g. the application of passive sampling techniques and advanced technologies. The diffusive gradients in thin films (DGT) technique with ferrihydrite adsorbent, has been investigated for the accumulation of different species of Arsenic (As), like Inorganic Species (arsenite and arsenate) and Organic Arsenic (dimethylarsinic and monomethylarsenate) in aqueous matrix. To evaluate the performance of DGT method for accumulation of arsenic species, after deployment in synthetic solutions, DGT devices were carried out on groundwaters collected in six different towns in the North of Italy, where the As concentration is very high. Recently, health effects at arsenic exposures have been observed in areas where levels of inorganic As in drinking water are not excessive. Antimony (Sb) is associated to As in several studies because the physical and chemical properties of these two elements are similar, and it has been recently recognized as water contaminant. In this thesis I reported for the first time detailed performance characteristics of the Fe-oxide gel associated to DGT devices deployed in known aqueous solutions of trivalent and pentavalent Sb. Speciation analysis of Sb(III) and Sb(V) in aqueous samples was performed through extraction and on-line determination of isotope dilution concentration after a chromatographic separation. Generally rice, unlike food products of terrestrial origin, contains significant amounts of inorganic arsenic. Recently some Government Organizations (e.g. EFSA) debated the possibility to set an upper limit for total and inorganic arsenic in rice. Arsenic speciation was realized in 70 Italian rice samples from different representative cultivation conditions. The most abundant forms in rice were As(III) and DMA(V). After that, it was fundamental to investigate the localization of As in rice grains in different processes (raw, brown and milled rice with or without parboiling technique), because both speciation and distribution throughout the grain are key factors controlling bioavailability of the contaminant. The As distribution in rice grains of two varieties (Gladio and Ronaldo) from different processes, was determined by LA-ICP-MS. The distribution of As varied between the various parts of the grains (exterior, medium and interior part). During parboiling, the partial boiling of food as the first step in the cooking process, arsenic might have released from the grain to the boiling water. Thus, parboiling of rice grain may reduce the magnitude of arsenic intake in human body. Actually the As content was higher in non-parboiled rice grain than in parboiled rice. The relationship between As intensities and the different parts of rice grain revealed that As levels decreased from the external part towards the middle position, and then the intensity values seem to be similar between medium and internal part in non parboiled products.
Runtti, H. (Hanna). "Utilisation of industrial by-products in water treatment:carbon-and silicate-based materials as adsorbents for metals and sulphate removal". Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526212630.
Pełny tekst źródłaTiivistelmä Teollisuuden jätevedet kuten kaivosvedet ja metalliteollisuuden prosessien jätevedet voivat sisältää monenlaisia haitallisia ja jopa myrkyllisiä aineita kuten metalleja ja sulfaattia. Adsorptiota käytetään yleisesti esimerkiksi metallien ja orgaanisten yhdisteiden poistossa vesiliuoksista, koska se on tehokas ja yksinkertainen menetelmä. Aktiivihiili on yleisimmin käytetty adsorbenttimateriaali vedenpuhdituksessa, mutta sen hinta joissain tapauksissa rajoittaa sen käyttöä. Tämän vuoksi on tarvetta kehittää vaihtoehtoisia adsorbenttimateriaaleja edullisista raaka-aineista. Viime vuosien aikana on raportoitu mm. teollisuus- ja mineraalijätteistä, joita voidaan hyödyntää vesien ja jätevesien puhdistuksessa. Tämän työn tavoitteena oli hyödyntää teollisuudesta muodostuvia jätemateriaaleja (hiilijäännös, metakaoliini, masuunikuona ja analsiimi) raudan, kuparin, nikkelin, arseenin, antimonin tai sulfaatin poistossa malli- ja jätevesistä. Materiaaleja käsiteltiin erilaisilla kemikaaleilla (aktivointi, modifiointi tai geopolymerointi), jotta niiden adsorptiotehokkuudet paranisivivat poistettavia aineita kohtaan. Tulokset osoittivat, että raudan, kuparin ja nikkelin poisto oli sekä käsittelemättömällä että sinkkikloridilla aktivoidulla hiilijäännöksellä korkeampi kuin kaupallisella aktiivihiilellä. Arseenin, nikkelin ja antimonin poistoa kaivosvedestä tutkittiin masuunikuona- ja metakaoliinigeopolymeereillä, joista masuunikuonageopolymeeri osoittautui tehokkaimmaksi metallien poistajaksi. Bariumkloridilla modifioitu masuunikuonageopolymeeri puolestaan poisti erittäin tehokkaasti sulfaattia kaivoksen jätevedestä. Rautakloridilla modifioitu hiilijäännös ja happopesty bariumkloridilla modifioitu analsiimi osoittatuivat myös lupaavaksi materiaaliksi sulfaatin poistossa
Luukkonen, T. (Tero). "New adsorption and oxidation-based approaches for water and wastewater treatment:studies regarding organic peracids, boiler-water treatment, and geopolymers". Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526210797.
Pełny tekst źródłaTiivistelmä Tämä väitöskirja käsittelee kolmea erillistä vedenkäsittelyteknologian osa-aluetta: orgaanisten perhappojen käyttöä jäteveden käsittelyssä, orgaanisten jäämien poistoa suolavapaasta kattilalaitoksen lisävedestä ja geopolymeerien sovelluksia vedenkäsittelysorbentteina. Orgaanisten perhappojen pääasialliset edut verrattuna kilpaileviin tekniikoihin ovat hyvä desinfiointiteho, korkea hapetuspotentiaali ja desinfioinnin sivutuotteiden muodostumattomuus. Permuurahais-, peretikka- ja perpropaanihapon vertailu osoitti permuurahaishapon olevan kemikaaleista tehokkain E. coli - ja enterokokkibakteerien inaktivoinnissa kustannus- ja teknisistä näkökulmista. Hapetuksessa, jossa käytettiin bisfenoli-A:ta malliaineena, ei kuitenkaan havaittu etua verrattuna edullisempaan vetyperoksidiin. Ruostumattoman teräksen (316L) pinnalla ei havaittu merkittävää korroosiota, kun taas hiiliteräs ei sovellu käytettäväksi perhappojen kanssa. Orgaaniset jäämät kattilalaitoksen vesi-höyrykierrossa hajoavat termisesti pienen moolimassan hapoiksi ja aiheuttavat korroosioriskin. Aktiivihiilisuodatuksen todettiin olevan soveltuva menetelmä orgaanisten jäämien poistoon lisävedestä. Aktiivihiililaatujen välillä ei havaittu merkittäviä eroja, mutta happopesu aktiivihiilen esikäsittelynä vähensi hiilestä liukenevien epäpuhtauksien määrää. Geopolymeerit ovat zeoliittien amorfisia analogeja ja niiden ioninvaihtokykyä voidaan hyödyntää vedenkäsittelysovelluksissa. Metakaoliini- ja masuunikuonapohjaisten geopolymeerien todettiin olevan lupaavia materiaaleja malliliuosten, kaatopaikan suotoveden ja kaivoksen purkuveden käsittelyssä poistettaessa ammoniumia, nikkeliä, arseenia ja antimonia
Boiron, Marie-Christine. "MINERALISATIONS A Au, As, Sb, ALTERATIONS HYDROTHERMALES ET FLUIDES ASSOCIES DANS LE BASSIN DE VILLERANGES (COMBRAILLES, MASSIF CENTRAL FRANCAIS)". Poitiers, 1987. http://www.theses.fr/1987POIT2278.
Pełny tekst źródłaMcCabe, S. "Novel methods for the determination of arsenic, antimoney and selenium in single cell protein". Thesis, University of Strathclyde, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381347.
Pełny tekst źródłaSchütt, Thomas. "Halogen-, Azid- und Koordinationsverbindungen des Arsens und Antimons". [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963037811.
Pełny tekst źródłaSchütt, Thomas. "Halogen-, Azid- und Koordinationsverbindungen des Arsens und Antimons". Diss., lmu, 2001. http://nbn-resolving.de/urn:nbn:de:bvb:19-3668.
Pełny tekst źródłaSILVA, LARISSA de S. "Avaliação da concentração de metais e elementos terras raras em amostras de sedimentos dos reservatórios dos sistemas Billings e Guarapiranga". reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/28040.
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O excessivo processo de urbanização da Região Metropolitana de São Paulo resultou na perda das características naturais dos seus cursos d\'água ocasionando profundas alterações nos regimes de vazão e de qualidade. O objetivo desse estudo foi avaliar a concentração de metais tóxicos, os semi-metais As, Sb e Se e os elementos terras raras, presentes em amostras de sedimento superficiais coletadas nos Reservatórios Billings, Guarapiranga e Rio Grande. Os elementos Ag, Al, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, Pb, Sb, Se e Zn foram determinados pela técnica de Espectrometria de Emissão Ótica com Plasma Indutivamente Acoplado (ICP OES). Alguns elementos maiores, traço e elementos terras raras (Ce, Eu, La, Lu, Nd, Sm, Tb e Yb) foram determinados pela técnica de Análise por Ativação Neutrônica Instrumental (INAA). A concentração de Hg total foi determinada pela técnica Espectrometria de Absorção Atômica com Geração de Vapor Frio (CVAAS). A validação das metodologias foi realizada por meio da análise de materiais de referência certificados. Para avaliar as possíveis fontes de contaminação antrópicas foram utilizadas as ferramentas de fator de enriquecimento (FE) e o índice de geoacumulação (IGeo). Os resultados obtidos pelas técnicas foram comparados com os valores orientadores TEL e PEL estabelecidos pelo CCME (Canadian Council of Ministers of the Environment) e adotados pela CETESB. Todos os pontos analisados apresentaram valores > TEL para todos os metais e dois pontos da represa Billings (BILL02100 e 02030), valores > PEL para As, Cr, Cu, Hg, Ni, Pb e Zn, provavelmente em decorrência do recebimento das águas do Rio Pinheiros e das bacias de drenagem do ribeirão Cocaia e Bororé. Os valores de FE e IGeo calculados apontaram possíveis contaminações antrópicas para Sb e Se para os elementos determinados por ICP OES e de As, Cr, Sb e Zn, por INAA. O reservatório Billings apresentou, em geral, as maiores concentrações para os elementos analisados, indicando uma má qualidade de seus sedimentos. Este estudo confirma a necessidade de um monitoramento frequente da qualidade do sedimento nos reservatórios estudados como procedimento indispensável para avaliação periódica da qualidade das bacias, considerando sua importância no fornecimento de água para a Região Metropolitana de São Paulo.
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
Casiot, Corinne. "Développement de techniques analytiques couplées (HPLC-ICP-MS et EC-ICP-MS) pour la spéciation de métalloi͏̈des (arsenic, sélénium, antimoine et tellure)". Pau, 1999. http://www.theses.fr/1999PAUU3026.
Pełny tekst źródłaSouza, Antonio Gouveia de. "Termoquimica de quelatos de dialquilditiocarbamatos envolvendo fosforo, arsenio, antimonio e bismuto trivalente : alguns aspectos termoquimicos de alcoxidos e tris (dietilamido) de arsenio (III)". [s.n.], 1986. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250061.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica
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