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Dissertations / Theses on the topic 'Mercury adsorption on Ni'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Tong, A. W. L. "Chemisorption studies on Ni(100)." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384364.

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2

Li, Xin. "Mercury Oxidation and Adsorption over Cupric Chloride-Based Catalysts and Sorbents for Mercury Emissions Control." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337959291.

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3

Byrne, Heather Elizabeth. "Adsorption, photocatalysis, and photochemistry of trace level aqueous mercury." [Gainesville, Fla.] : University of Florida, 2009.

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4

Cooper, Elaine. "Infrared studies of hydrocarbon adsorption on Ni{111}." Thesis, University of Aberdeen, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296514.

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Reflection-absorption infrared spectroscopy (RAIRS) has been used to probe the interaction of cyclohexane, partially deuterated cyclohexane C<sub>6</sub>HD<sub>11</sub>, toluene and ethylene with the Ni{111} surface. The coadsorption of cyclohexane and oxygen on the Ni{111} surface has also been studied in some detail; the effects of differing coverages of both pre- and post- dosed oxygen on cyclohexane adsorption has been investigated. As these experiments were the first to be completed using a new UHV system, an important element of this PhD project involved commissioning the UHV system, inc

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5

Siddiqui, Naved Ahmed. "DEVELOPMENT OF BAMBOO DERIVED SORBENTS FOR GAS PHASE ADSORPTION OF ELEMENTAL MERCURY." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1879983301&sid=4&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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6

Hakami, Othman. "Synthesis and use of magnetic nanoparticles for the adsorption of mercury from water." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/348890/.

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This study used magnetite (Fe3O4) nanoparticles (NPs), mesoporous silica coated magnetite NPs (SCMNPs) and thiol functionalised silica-coated magnetite nanoparticles (SH-SCMNPs) for Hg(II) removal and recovery from water. The Fe3O4 NPs were prepared via conventional co-precipitation methods. Mesoporous silica coating was created on dense liquid-silica coated magnetite NPs (DLSC-Fe3O4 NPs) using cetyltri-methyl-ammonium chloride (CTAC) as molecular templates and followed by a sol-gel reaction. SCMNPs were functionalised with 3-MPTMS using the co-condensation method. Functionalisation of SCMNPs

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7

Hemmer, Hailey A. "Fixed Bed Adsorption Studies of the Simultaneous Removal of Mercury and Nitrogen Oxides." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470043930.

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8

Beckerle, John David. "Dynamics of molecular adsorption : I--collision induced dissociative chemisorption and desorption of CH4ON Ni(111), II--adsorption of CO and O2ON Ni(111) at 8 K." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14605.

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9

Nunney, Timothy Sion. "Adsorption and reaction of methylamines on Ni(111) single crystal surfaces." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366723.

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10

Lloyd-Jones, Peter J. "Adsorption of trace toxic metals by Azolla filiculoides from aqueous solution." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/7800.

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Azolla filiculoides has been evaluated for the adsorption of trace toxic metals from aqueous solution. The adsorption performance of the material was compared with commercial resins and fitted using the Langmuir and Freundlich models. The Freundlich model described the adsorption of copper and cadmium. Whilst the Langmuir isotherm had the better fit of the mercury data. The assumptions of the Freundlich model include multi-layer adsorption and different functional group binding. Conversely the Langmuir model suggests mono-layer adsorption and can infer single group reactivity. The pH effect on

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11

KIM, BO GYEONG. "Mercury-Containing Species and Carbon Dioxide Adsorption Studies on Inorganic Compounds Using Density Functional Theory." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/193659.

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The goal of this research is to obtain the adsorption mechanisms of toxic mercury-containing species (Hg, HgCl and HgCl2) and carbon dioxide (CO2) on inorganic solid surfaces using theoretically predicted results because experiments have been unable to unravel the involved issues. The understanding of the adsorption mechanisms of the mercury species and carbon dioxide from flue gases is important when considering mercury capture from coal-fired power plants, artisanal gold mining, and cement manufacturing industries. The current research attempts to explain each adsorption mechanism for merc

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12

Berg, Marie. "Removal of Ni (II) from water using recombinant Escherichia coli." Thesis, KTH, Skolan för bioteknologi (BIO), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149288.

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13

Elbiache, Abdelmoula. "Adsorption et ségrégation du soufre sur les alliages Fe-Cr-Ni et Fe-Cr-Ni-Mo : compositions superficielles, dissolution anodique et passivation." Paris 6, 1987. http://www.theses.fr/1987PA066357.

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Etude par spectrométrie Auger, rétrodiffusion d'ions et microanalyse par réactions nucléaires de l'adsorption du soufre à 970c sur les alliages Fe-17Cr-13Ni, Fe-17Cr-14,5Ni-2,5Mo. Analyse de la composition et de la structure des surfaces. Influence du soufre adsorbe ou dissous sur la dissolution anodique et la passivation des alliages. Examen des films passifs.

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14

Pitoniak, Erik Richard. "Evaluation of nanostructured silica-titania composites in an adsorption/photocatalytic oxidation system for elemental mercury vapor control." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0007544.

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15

Busireddy, Bhargavi. "Study of Mercury Transformation with Chlorinated Species under Homogeneous and Heterogeneous Conditions." University of Dayton / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1299087195.

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16

Hitchcock, Iain. "Pore structure characterisation : the challenge to understand heterogeneous catalysts and fuel cells." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545320.

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17

Gopinathan, Navin. "Development of catalyst characterisation techniques." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.571865.

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Standard catalyst characterisation techniques such as gas adsorption porosimetry and mercury porosimetry only account for some of the physical heterogeneity of the catalyst surface. They completely ignore the chemical heterogeneity present and in most cases consider pores present in the medium to be independent of each other. Thus, most results of characterisation (pore space descriptors such as BET surface area, BJH pore size distribution, mercury porosimetry surface area, etc.) are not accurate. This has been a major issue that remains to be resolved during the characterisation of fresh and

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18

Perera, Chaminda Kithsiri. "The Effects of Mercury on the Performance of Ni/YSZ Anode in a Planar Solid Oxide Fuel Cell." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1268934012.

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19

Monteiro, Raquel Almeida. "Avaliação do potencial de adsorção de U, Th, Pb, Zn e Ni pelas fibras de coco." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29082011-144757/.

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A biomassa residual proveniente de atividades agrícolas tem sido avaliada como biossorvente de metais e compostos orgânicos devido às propriedades adsortivas, ao baixo custo, abundância e ser uma fonte renovável. Neste trabalho apresenta-se a eficiência das fibras de coco como biossorvente na remoção de íons de U, Th, Pb, Zn e Ni de meio aquoso. A fibra de coco é um sub-produto do coco, uma fonte natural renovável. O estudo foi realizado por ensaio em batelada. Estudaram-se a influência do pH 1 a 8, a dosagem das fibras de coco e o tempo de equilíbrio. Verificou-se que a adsorção aumenta com o

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20

Jiang, Ping. "Mercury Sulfide Dissolution in Environmental Conditions: Thermodynamic and Kinetic Approaches." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/3027.

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Mercury (Hg) is a global contaminant of ecosystems and human health risk, with complicated biogeochemical processes. Mercury sulfide (HgS) dissolution has been suggested as a key process in Hg cycling, as it could potentially increase the pool of inorganic Hg (iHg) for the production of methylmercury (MeHg). Despite previous sporadic observations of enhanced HgS dissolution under certain conditions, much remains unclear on mechanisms of HgS dissolution. The objective of my research was to advance the mechanistic understanding of HgS dissolution, concerning re-adsorption of released Hg, effects

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21

Karlsson, Lovisa. "Waste Water Treatment - A Case Study : Removal of Ni, Cu and Zn through precipitation and adsorption." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-26130.

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Waste water containing high concentrations of dissolved metals were delivered to the environmental company SAKAB. After standard treatment procedure, involving regulation of pH and addition of flocculation agents, the water still contained nickel concentrations of 26 mg/l. Since SAKAB’s regulatory concentration limit value for nickel in outgoing water is 0.5 mg/l, further treatment was necessary. According to the supplier of the water, a complexing agent similar to EDTA had been added to the water. The aim of this study was to decrease concentrations of nickel, zinc and copper. One part of thi

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22

Selbe, Tyler J. "Applications of aluminosilicate and zincosilicate materials: aqueous phase ion exchange and gas phase adsorption." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/7057.

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Doctor of Philosophy<br>Department of Chemical Engineering<br>Jennifer L. Anthony<br>Zeolites and zeolite-like materials have well-ordered structures and pores creating varying capacities for molecules based upon size, functional groups, polarity, and intermolecular forces making the materials useful for molecular sensing as well for molecules that are considered hazardous at very low concentrations with reproducible results because of these properties. This study will identify and characterize applications for zeolite and zeolite-like materials in gas and liquid phases based upon the dominat

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23

Singhon, Rattiya. "Adsorption of Cu(II) and Ni(II) Ions on Functionalized Colloidal Silica Particles Model Studies for Wastewater Treatment." Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2077/document.

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Ce doctorat porte sur la fonctionnalisation de silices colloïdales en vue de la rétention de micropolluants métalliques dans des effluents. Les nanoparticules et microparticules ouvrent des potentialités d’application dans de nombreux secteurs industriels (chimie, environnement, pharmacie...). Ainsi, ces travaux de recherche portent sur la synthèse et la caractérisation de matériaux composites submicroniques : il s’agit de silices colloïdales sur lesquelles sont greffés des silanes ou supportés des polysaccharides. Une des applications de ces travaux de recherche porte sur l’adsorption de méta

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24

Deligny, Julien. "Hydrogénation de composés aromatiques en présence de Ni/Al2O3 : approche théorique et expérimentale." Thesis, Poitiers, 2018. http://www.theses.fr/2018POIT2261.

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Les fluides spéciaux (mélanges d’hydrocarbures utilisés comme solvants pour applications diverses) sont produits à partir de l’hydrodésaromatisation des charges pétrolières (naphta et distillats moyens) initialement riches en aromatiques. Leur mise en marché respecte une exigence environnementale (moins de 100 ppm en aromatique) parfois difficile à atteindre compte tenu de la composition initiale de la charge. Par conséquent, à partir de l’identification des molécules réfractaires à l’hydrogénation, un choix de molécules modèles réparti selon trois familles, les monoaromatiques (toluène, indan

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25

Murki, Sai Rohith, and Yaswanth Puttagunta. "CFD Simulation of an Activated Carbon Filter." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13839.

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In various industries, specialized filters with activated carbon are used for adsorbing mercury from air-flows. MRT has eight such Activated CarbonFilters (ACFs) in one of their devices. The main purpose of research is tostudy the flow in the ACF filter and suggest a mathematical model for the complete system through which an improved design can be found.Simulation of a single ACF illustrates how the current system’s air flow does not cover the whole filter leaving part of the carbon bed unused forthe adsorption. This is validated by experimental data. A theoretical studybased on a mathematica

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26

Scantlebury, Matthew John. "Coadsorption of potassium and nitrogen on the Ni(100) surface." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365913.

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27

Aden, Moumin. "Adsorption des ions Pb(II) et Ni(II) sur des particules de silices fonctionnalisées déposées sur des biopolymères naturelles pour le traitement des eaux usées." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCD053.

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Ce travail de thèse a pour objet principal la préparation de matériaux submicroniques à base de polymères issus de la biomasse marine (alginates et chitosane) pour la captation de micropolluants métalliques dans les effluents. Dans ce contexte, une panoplie d’adsorbants est testée. Ces derniers sont des silices colloïdales sur lesquelles sont fixés des alkoxysilanes fonctionnels puis encapsulés d’une part par du carboxymethylchitosane (CM-CS) ou d’autre part extrudé par des alginates extraits des algues brunes de Djibouti. Dans le cadre de ce doctorat, et du fait de la plupart des autres techn

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28

Fischer, Jonathan David. "The adsorption of molecular oxygen on Au/Ni(111) alloys and its oxidation of CO at 85 K." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62054.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2010.<br>Vita. Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Molecular oxygen is observed to adsorb on 0.2 - 0.6 ML Au/Ni(111) surface alloys. Molecular oxygen adsorbates are characterized by their 0-0 stretching frequencies of 740 cm', 851 cm' and 962 cm', as measured by high resolution electron energy loss spectroscopy (HREELS). The concentrations and frequencies of these species are determined as a function of Au coverage. The concentrations and frequencies of dissociatively chemis

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29

Macedo, Rafael dos Santos [UNESP]. "Influência dos diferentes cátions metálicos (Cu 2+ , Ni 2+ , Pb 2+ , Cd 2+ ) na formação do hidrogel bentonita – poli (vinil álcool)." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/97733.

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Made available in DSpace on 2014-06-11T19:29:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-06-20Bitstream added on 2014-06-13T19:17:16Z : No. of bitstreams: 1 macedo_rs_me_sjrp.pdf: 1014098 bytes, checksum: 22d514f6016c3d545c85ab484bd0c9eb (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>No presente trabalho, estudou-se a interação de cátions metálicos (Cu 2+ , Ni 2+ , Pb 2+ , Cd 2+ ) com sistemas constituídos por argila, bem como sua interação com PVA para verificar as influências destes cátions na formação de hidrogel. Nos experimentos foi utiliza

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30

Duarte, Mendes Catita Leonor. "Contribution of NMR and Raman imaging for modeling and rationalization of the impregnation process of metallic precursors in porous media." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1262/document.

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Cette thèse s’inscrit dans le domaine de la catalyse hétérogène pour des applications en raffinage et en pétrochimie. Plus particulièrement, nous avons choisi d’étudier le cas des catalyseurs d’hydrotraitement largement utilisés dans les procédés de conversion du pétrole en carburant. Ces catalyseurs sont constitués d’une phase métallique sulfurée supporté sur un support poreux inorganique.Dans ce travail, nous nous sommes particulièrement intéressés à la compréhension et la modélisation de la première étape de préparation d’un catalyseur d’hydrotraitement : l’étape d’imprégnation. Une méthodo

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31

Godongwana, Ziboneni Governor. "Highly selective mesoporous sorbents for mercury removal from industrial wastewater." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8398_1320306023.

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The results of this study show that novel mesoporous carbons were obtained as inverse replica of SBA-15, HMS and MCM-41 silica templates, with a large pore diameter (2-4 nm), a BET surface area of 1867, 874 and 910 m2g â1 respectively for CA_SBA-15_LPG_105, CA_HMS_LPG_80 and CA_MCM- 41_LPG_80 with bimodal pore size distribution (PSD) in the mesopores range. The results obtained show that mesoporous carbon with graphitic structures can be synthesized via the LPG route.

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32

Westermarck, Sari. "Use of mercury porosimetry and nitrogen adsorption in characterisation of the pore structure of mannitol and microcrystaline cellulose powders, granules and tablets." Helsinki : University of Helsinki, 2000. http://ethesis.helsinki.fi/julkaisut/mat/farma/vk/westermarck/.

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33

Macedo, Rafael dos Santos. "Influência dos diferentes cátions metálicos (Cu 2+ , Ni 2+ , Pb 2+ , Cd 2+ ) na formação do hidrogel bentonita - poli (vinil álcool) /." São José do Rio Preto : [s.n.], 2012. http://hdl.handle.net/11449/97733.

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Orientador: Iêda Aparecida Pastre<br>Banca: José Pachoal Batistuti<br>Banca: Vera Aparecida de Oliveira Tiera.<br>Resumo: No presente trabalho, estudou-se a interação de cátions metálicos (Cu 2+ , Ni 2+ , Pb 2+ , Cd 2+ ) com sistemas constituídos por argila, bem como sua interação com PVA para verificar as influências destes cátions na formação de hidrogel. Nos experimentos foi utilizada uma variedade de argila denominada bentonita, composta predominantemente pelo argilomineral montmorilonita, previamente fracionada e purificada, e então saturada com cátion sódio. A argila foi caracterizada po

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34

Barros, Arielle Muniz de. "Bioadsorção e dessorção dos íons 'Cd POT. 2+', 'Cu POT. 2+' , 'Ni POT. 2+', 'Pb POT. 2+' e 'Zn POT. 2+' pela macrófita aquáica Azolla pinnata." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266685.

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Orientadores: Meuris Gurgel Carlos da Silva, Sirlei Jaiana Kleinübing<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T10:55:13Z (GMT). No. of bitstreams: 1 Barros_ArielleMunizde_M.pdf: 2403867 bytes, checksum: 9d034ece43d77bf5fa23832c79a98b8c (MD5) Previous issue date: 2012<br>Resumo: Pesquisas no campo da tecnologia têm buscado avaliar técnicas e/ou processos econômicos e eficientes para o tratamento de efluentes que contenham metal pesado. Atualmente a bioadsorção vem se apresentando como uma boa alter

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35

Gédéon, Antoine. "Contribution à l'étude par RMN (H et Xe) des zéolithes MY (M=NA, NI et CO) adsorption d'eau et d'ammoniac /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376053410.

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36

Elmroth, Edvin. "Adsorption of Zn, Cd, V, Ba, Cu, Mo, Ni, Cr, Li and Pb to silicon and aluminium reduced AOD-slag." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-68989.

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During production of steel, slag is formed as a by-product. The process of steelmaking involves usage of additives such as chromium or vanadium as reactants to optimize and produce high quality steel. Vast amounts of slag are formed and there is a continuous search for applications that can make good use of the slag. Currently the use of slag in cleaning of metal polluted waters is researched and promising results has been found for many different types of slags. In this work two different AOD-slags has been used as sorbents for some selected elements (Zn, V, Cr, Mo, Pb, Li, Cd, Ba, Cu, Ni). T

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37

Nascimento, Fernando Henrique do. "Desenvolvimento de métodos de análise por injeção sequencial com detecção eletroquímica para a aplicação em estudos de interação de Hg(II), As(III) e Se(IV) com ligantes heterogêneos de ocorrência natural." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-30112016-100019/.

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Os diferentes efeitos que Hg(II), As(III) e Se(IV) causam ao meio ambiente e à saúde dos seres vivos levaram ao desenvolvimento de uma ampla variedade de técnicas analíticas para a determinação destas espécies, com destaque para a voltametria e cronopotenciometria de redissolução. As interações com ligantes heterogêneos de ocorrência natural são fundamentais para o transporte e disponibilidade de Hg(II), As(III) e Se(IV) no meio ambiente. O estudo das interações pode contribuir com tecnologias de remediação mais eficientes, evitando a introdução, ou permitindo a remoção de espécies de Hg(II),

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38

Mohsenzadeh, Abas. "Computational studies of nickel catalysed reactions relevant for hydrocarbon gasification." Doctoral thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-323.

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Sustainable energy sources are of great importance, and will become even more important in the future. Gasification of biomass is an important process for utilization of biomass, as a renewable energy carrier, to produce fuels and chemicals. Density functional theory (DFT) calculations were used to investigate i) the effect of co-adsorption of water and CO on the Ni(111) catalysed water splitting reaction, ii) water adsorption and dissociation on Ni(111), Ni(100) and Ni(110) surfaces, as well as iii) formyl oxidation and dissociation, iv) hydrocarbon combustion and synthesis, and v) the water

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Zazycki, Maria Amélia. "ADSORÇÃO DE METAIS (Au, Cu e Ni) PRESENTES EM LIXIVIADOS DE CONTACTORES DE TELEFONES CELULARES." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/8805.

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In this work, chitin (CTN), chitosan (CTS) and activated carbon (AC) were used as adsorbents to recover metals (Au, Ni and Cu) from leachates of mobile phone wastes. The mobile phone wastes (contactors) were collected and characterized. The metals were extracted by thiourea leaching. The adsorption of metals from the leachates was studied according to the kinetic and equilibrium viewpoints. It was found that the contactors were composed by Au, Ni, Cu and Sn. The thiourea leaching provided extraction percentages of 68.6% for Au, 22.1% for Ni and 2.8% for Cu. Sn was not extracted. The leac

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40

Etchebers, Olivier. "Etude pluricontextuelle et pluridimensionnelle de la mobilité des métaux lourds (Cd, Ni, Pb) dans les sols." Pau, 2004. http://www.theses.fr/2004PAUU3004.

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La mobilité des métaux lourds est étudiée dans trois contextes de contamination, chacun à une échelle différente. Le premier est l'épandage de boues de station d'épuration sur sol forestier. Les processus sont accélérés par centrifugation, en microcosme. Malgré plusieurs mois d'évolution simulée, la migration des métaux (Cd, Ni, Pb) reste très limitée, vraisemblablement par affinité avec la matière organique accumulée en surface. Le deuxième est réalisé en mésocosme, à partir d'une terre agricole dopée en Pb. Après plusieurs mois en milieu extérieur, le Pb est retenu dans le solide. Il est ads

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41

Nascimento, Fernando Henrique do. "Estudo de interação de Hg(II) com ligantes heterogêneos de ocorrência natural usando voltametria de redissolução anódica automatizada em sistema de análise por injeção sequencial." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-05062012-114329/.

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Dentre as espécies químicas metálicas responsáveis pela contaminação do meio aquático, mercúrio e outros compostos mercuriais têm recebido atenção especial devido a sua alta toxicidade. Os ligantes de ocorrência natural formam complexos com íons de Hg2+, influenciando a sua biodisponibilidade. Em meio a esses ligantes, dá-se destaque aos ligantes heterogêneos de ocorrência natural (LHON), tais como substâncias húmicas e argilominerais, por sua elevada capacidade de adsorção/complexação com íons metálicos. Entre as técnicas existentes para a determinação de Hg(II), as voltamétricas, em especial

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Pinheiro, Cyntia Helena Ravena. "Zn, Ni, Cr, Cu, Fe e S em Iodo de esgoto: comportamento químico, adsorção e proposta de tratamento." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/44/44134/tde-15052008-153050/.

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A preocupação com a disposição de lodo de esgoto no Brasil resultou do aumento do volume de esgoto tratado e tem exigido alternativas para a sua disposição final. A princípio, a utilização agrícola se apresenta como uma das propostas viáveis uma vez que o lodo é rico em matéria orgânica, macro e micronutrientes necessários à fertilidade dos solos. Entretanto, há que ser considerado o impacto ambiental de alguns desses elementos, como Hg, As, Cd, Pb, Ag, Cu, Zn entre outros, sobre o solo, biota e águas, superficiais e subterrâneas. A ETE Barueri é a maior estação de tratamento de esgoto do esta

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Ouafi, Driss. "Caracterisation par spectroscopie infrarouge des catalyseurs d'hydrotraitement ni-w supportes, a l'etat oxyde ou sulfure." Caen, 1986. http://www.theses.fr/1986CAEN2021.

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Vieira, Rodrigo Silveira. "Adsorção competitiva dos ions cobre e mercurio em membranas de quitosana natural e reticulada." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266204.

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Orientadores: Marisa Masumi Beppu, Eric Guibal<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-11T08:07:34Z (GMT). No. of bitstreams: 1 Vieira_RodrigoSilveira_D.pdf: 3808842 bytes, checksum: 11ce477168f6648e2b9dbfc9e1eba278 (MD5) Previous issue date: 2008<br>Resumo: Nos últimos anos, a quitosana, um polissacarídeo linear obtido através da desacetilação da quitina, tem sido descrito como um biopolímero para remoção de metais pesados a partir de efluentes industrias, devido a presença de grupos amino e hidroxilas e

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Teixeira, Raimundo Nonato Pereira. "Removal of Cu (II), Ni (II), Cd (II) and Pb (II) of wastewater of electroplating industry using hybrid system adsorption electro-flotation-coagulation." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13711.

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FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>Bodies of water contamination problems have stimulated many researchers around the world in the search for alternatives to solve or minimize the effects caused by discharges of toxic materials to the environment. What is desired, preferably, is that such solutions are economically viable and efficient. Toxic metals on the list of the main contaminants of water bodies. Because these are very dangerous chemicals, this class of materials has led many research groups seeking to achieve avoid contamination of water bodies by

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Sebok, Carlo de Faria. "Avaliação da remoção mono e multicomponente de Cu, Zn e Ni em argila bentonita nacional." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266994.

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Orientadores: Meuris Gurgel Carlos da Silva<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-08T07:19:47Z (GMT). No. of bitstreams: 1 Sebok_CarlodeFaria_M.pdf: 10695101 bytes, checksum: ab11890fc45a6f76a4722b89c0f80eb0 (MD5) Previous issue date: 2007<br>Resumo: O crescente desenvolvimento tecnológico no meio de produção leva, inevitavelmente, à geração de resíduos que crescem em proporção e toxicidade à medida que a complexidade desses processos aumenta. Os metais pesados, em particular, por serem elementos

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Pretorius, Patrius Julius. "The adsorption of Ni, Cu, Zn, Cd and Pb by δ-MnO₂ and its inclusion in an equilibrium model of metal partitioning in soils". Doctoral thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/18487.

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Chemical equilibrium modelling provides a mechanistic tool for the prediction of metal partitioning in soils, which is important in predicting the fate and effects of metals in soil systems. In order to set up an equilibrium model of metal partitioning in soil systems, thermodynamic data for all processes influencing metal fate in soil systems are needed. In this work, the adsorption of the metals nickel, copper, zinc, cadmium and lead by δ-MnO₂ is investigated. This was done in order to provide thermodynamic data for an important adsorption phase in soils systems. Before this work, consistent

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Sanghavi, Urvi. "Novel Regenerable Adsorbents for Wastewater Treatment from Wet Flue Gas Scrubbers." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin147982088374556.

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Kotdawala, Rasesh R. "Adsorption studies of hazardous air pollutants in microporous adsorbents using statistical mechanical and molecular simulation techniques." Worcester, Mass. : Worcester Polytechnic Institute, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-050407-112429/.

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Dissertation (Ph.D.) -- Worcester Polytechnic Institute.<br>Keywords: Activated carbons; Hydrogen cyanide; Methyl ethyl ketone; Adsorption; Mercury; Monte-Carlo; Solvents; Molecular simulations; Zeolites; Water; Methanol; Nanopores. Includes bibliographical references (leaves 147-150).

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Capella, Salmazo Debora Heloisa. "Theoretical investigation of the hydrogen electrocatalysis in alkaline media on bimetallic Ni-based electrodes." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF067/document.

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Le mécanisme de la réaction d’oxydation de l’hydrogène (HOR) dans Ni (111) est bien connu et se fait par étapes de Volmer-Heyrovsky, en milieu alcalin. Il a été proposé que la formation d'eau puisse jouer un rôle important. Dans cette thèse, j'ai étudié les surfaces de nickel et de nickel bimétallique en utilisant la théorie de la densité fonctionnelle (DFT). J'ai calculé des magnitudes thermodynamiques (comme les énergies libres d'adsorption de Gibbs) et des propriétés cinétiques (comme des barrières d'activation pour la formation d'eau). Plusieurs surfaces Ni / Cu ont été analysées. Celle qu

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