Log in

Relevant bibliographies by topics / And toxic metals / Dissertations / Theses

To see the other types of publications on this topic, follow the link: And toxic metals.

Dissertations / Theses on the topic 'And toxic metals'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'And toxic metals.'

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 dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Clark, Amy Louise. "Mechanisms of metal binding and resistance to toxic metals in bacteria from soils polluted with toxic metals." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341456.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Cheung, Kai-him Matthew, and 張啟謙. "Bioremediation of toxic metals." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/194562.

Full text

Abstract:

Traditional remediation techniques in removing toxic metal contaminants using physical and chemical methods are expensive and may cause other forms of damage to the environment, comparing with these techniques bioremediation can serve as an inexpensive, effective and environmental friendly remediation method. This thesis mainly discusses different bioremediation techniques and identifies possible areas in Hong Kong for bioremediation and suggests bioremediation methods for each potential area. Bioremediation of toxic metals is the use of microorganisms, plants, or even larger sized organisms t

APA, Harvard, Vancouver, ISO, and other styles

3

Md, Noh Mohd Fairulnizal. "Electrochemical sensors development for toxic heavy metals." Thesis, Cranfield University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422358.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Paul, Uchenna Prince. "Fluorescence Detectors for Proteins and Toxic Heavy Metals." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd416.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Prasetyo, Imam. "Removal of toxic metals from aqueous solutions by biosorption." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60713.

Full text

Abstract:

Several non-living algal and fungal biomass types were investigated for biosorption of cadmium, lead and a number of other heavy metal ions in aqueous solution. Marine algae A. nodosum was identified for the highest uptake for these metals, and even better than commercial ion exchange resin. A. nodosum maximum uptake capacities for lead and cadmium were in excess of 2590 mg Pb/(g dried biomass) and 120 mg Cd/(g dried biomass), respectively (pH:3.5-5.5). The adsorption mechanism for this natural material is reversible. Meal ions can be easily eluted from the biosorbent with dilute mineral acids

APA, Harvard, Vancouver, ISO, and other styles

6

Moberly, James Gill. "Biogeochemical cycling of toxic metals in Lake Coeur d'Alene sediments." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/summer2006/J%5FMoberly%5F063006.PDF.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Davis, Sheldon Brant. "Interactions between semi-volatile toxic metals and sorbents in combustors." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284079.

Full text

Abstract:

The emission of semi-volatile toxic metals from boilers and incinerators is a major concern. One potential method to control semi-volatile metal emissions is high temperature sorbent injection. In this work, binary combinations of two toxic metals and three sorbents--kaolinite, hydrated lime, and a paper waste-derived sorbent (PWDS), were examined qualitatively and quantitatively. PWDS is a novel material produced from the waste sludge of the paper recycling process. An aerosol size-fractionation technique was developed to discriminate between metal vapor and metal that is either condensed on

APA, Harvard, Vancouver, ISO, and other styles

8

Ansari, Tariq Mahmood. "Bioanalytical studies on barytes." Thesis, University of Aberdeen, 1999. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU115694.

Full text

Abstract:

Barytes (the naturally occurring BaSO4) is used as the standard densification agent in drilling fluids world-wide. It increases the density of the drilling fluids for control of formation pressures. It has been highlighted as a major source of toxic heavy metals input in the oil and gas industry. Large scale use in the offshore oil well drilling operations and subsequent discharges of spent drilling fluids containing barytes to the marine environment have raised concerns regarding the potential for bioaccumulation in marine biota of the toxic heavy metals and the possible human health risks. V

APA, Harvard, Vancouver, ISO, and other styles

9

Rahman, Aminur. "Bioremediation of Toxic Metals for Protecting Human Health and the Ecosystem." Doctoral thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-51436.

Full text

Abstract:

Heavy metal pollutants, discharged into the ecosystem as waste by anthropogenic activities, contaminate drinking water for millions of people and animals in many regions of the world. Long term exposure to these metals, leads to several lethal diseases like cancer, keratosis, gangrene, diabetes, cardio- vascular disorders, etc. Therefore, removal of these pollutants from soil, water and environment is of great importance for human welfare. One of the possible eco-friendly solutions to this problem is the use of microorganisms that can accumulate the heavy metals from the contaminated sources,

APA, Harvard, Vancouver, ISO, and other styles

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

11

Deakin, David. "The leaching of toxic metals from chromite ore processing residue (COPR)." Thesis, University of Leeds, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270896.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Duan, Zhiwei. "The Distribution of Toxic and Essential Metals in the Florida Everglades." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/684.

Full text

Abstract:

Concentrations of 18 metals, including toxic metals (As, Cd, Cr, Ni and Pb) and essential metals (Al, Ba, Be, Co, Cu, Fe, Li, Mg, Mn, K, Sr, V and Zn) in various compartments (sediment, floc, and periphyton) were measured in the Florida Everglades to (i) establish the spatial distribution pattern of the metals in the Everglades and (ii) quantify the major sources of the 18 metals present in the Everglades. The highest mean concentrations of all metals analyzed in the Everglades were detected in soil, followed by floc and periphyton. Most metals exhibited random spatial distribution patterns. R

APA, Harvard, Vancouver, ISO, and other styles

13

Smith, Debbie A. "Analytical Methods for Toxic Metals and Proteins and Synthesis of Perovskites." Youngstown State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1289923061.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Trouillet-Richaud, Raphaelle. "Toxic emissions from the gasification and combustion of coal and biomass waste." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313145.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Hart, Mark Christopher. "Mercury resistance genes in a natural Bacillus population." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Li, Shuo. "Interactions of Toxic Metals with Algal Toxins Derived from Harmful Algal Blooms." FIU Digital Commons, 2011. http://digitalcommons.fiu.edu/etd/478.

Full text

Abstract:

The purposes of this study were to characterize the complexation of toxic metals with algal toxins and to determine the effects of arsenic and copper on the growth of Karenia brevis under specific experimental conditions. Microcystins, pahayokolides, brevetoxins and okadaic acid were used as representatives of algal toxins while arsenic, copper, cadmium, cobalt, iron, manganese and mercury were selected as typical toxic metals (including metalloids here) in the aquatic environment. The stabilities of the toxin-metal complexes were determined using equilibrium dialysis and/or centrifugal ultraf

APA, Harvard, Vancouver, ISO, and other styles

17

Oropeza, Garcia Norma Angélica. "Development of an artifical phytoremediation technology for soils contaminated by toxic metals." Mémoire, École de technologie supérieure, 2013. http://espace.etsmtl.ca/1213/1/OROPEZA_GARCIA_Norma_Ang%C3%A9lica.pdf.

Full text

Abstract:

À l’échelle mondiale, la contamination des sols et la pollution des eaux souterraines par les métaux toxiques (Pb, As, Cr, Ni, Zn, etc.) sont de plus en plus problématiques tant pour les écosystèmes que pour la santé humaine. Actuellement, la phytoextraction et la phytoaccumulation sont étudiées pour la décontamination des métaux, car elles offrent une option de traitement à faible coût. À partir d'une approche biomimétique, l'objectif général de ce travail est de proposer, au niveau conceptuel, une nouvelle technologie physico-chimique basée sur les mécanismes de transport de contaminants par

APA, Harvard, Vancouver, ISO, and other styles

18

Carter, Timothy Glen 1976. "New supramolecular assemblies of toxic metal coordination complexes." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/10562.

Full text

Abstract:

xvii, 147 p. : ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.<br>Supramolecular chemistry is a relatively new and exciting field offering chemists simplistic approaches to generating complex assemblies through strategically designed ligands. Much like the many spectacular examples of supramolecular assemblies in nature, so too are chemists able to construct large, elegant assemblies with carefully designed ligands which bind preferentially to target metal ions of choice. An important concept of s

APA, Harvard, Vancouver, ISO, and other styles

19

Al-Sheraideh, Mohammed Sharif. "Evaluation of the environmental impact of trace elements in the Zarqa River using chemometric analysis of inductively coupled plasma optical emission spectroscopy data (ICP-OES)." Thesis, University of Hull, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327172.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Cooper, Julia E. "Analysis of nutraceuticals for toxic metals development and validation of sample preparation method /." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1181250982/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Selepe, Mamaropeng Marcus. "The removal of toxic heavy metals from aqueous solutions by algal extracellular polysaccharides." Thesis, Rhodes University, 1999. http://hdl.handle.net/10962/d1004054.

Full text

Abstract:

This study investigated the possible use of algal extracellular polysaccharide as a biosorbent for removal of heavy metals (copper and lead) from aqueous solutions as a means of bioremediation for metal containing effluents. This biopolymer has good biosorbent properties and a potential to provide a cost effective, selective and efficient purification system. A variety of environmental conditions induce the production of extracellular polysaccharides in algae. The production of exopolysaccharides by Dunaliella cultures was induced by nitrogen deficient conditions. A high ratio of carbon to nit

APA, Harvard, Vancouver, ISO, and other styles

22

Mohamed, Ziyath Abdul Majeed. "Removal of toxic metals in a multi metal system using sorbents for potential application to urban stormwater treatment." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/53193/1/Abdul_Mohamed_Ziyath_Thesis.pdf.

Full text

Abstract:

In the context of increasing demand for potable water and the depletion of water resources, stormwater is a logical alternative. However, stormwater contains pollutants, among which metals are of particular interest due to their toxicity and persistence in the environment. Hence, it is imperative to remove toxic metals in stormwater to the levels prescribed by drinking water guidelines for potable use. Consequently, various techniques have been proposed, among which sorption using low cost sorbents is economically viable and environmentally benign in comparison to other techniques. However, so

APA, Harvard, Vancouver, ISO, and other styles

23

Giansante, Ruth Helena. "Potencial de Rizobactérias para a Remoção de Cádmio em Solução." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/153351.

Full text

Abstract:

Submitted by RUTH HELENA GIANSANTE null (ruthhgster@gmail.com) on 2018-04-03T13:04:19Z No. of bitstreams: 1 RUTH_GIANSANTE_DISS_versÃ£o final (20DEZ2017) (5)6.pdf: 858614 bytes, checksum: 2838c4b704bfcc265b052ef9b29dcb67 (MD5)<br>Approved for entry into archive by Alexandra Maria Donadon Lusser Segali null (alexmar@fcav.unesp.br) on 2018-04-03T18:23:48Z (GMT) No. of bitstreams: 1 giansante_rh_me_jabo.pdf: 858614 bytes, checksum: 2838c4b704bfcc265b052ef9b29dcb67 (MD5)<br>Made available in DSpace on 2018-04-03T18:23:48Z (GMT). No. of bitstreams: 1 giansante_rh_me_jabo.pdf: 858614 bytes, chec

APA, Harvard, Vancouver, ISO, and other styles

24

Haye, Jennifer Marcelle. "Role of natural organic matter in governing the bioavailability of toxic metals to american oysters." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3796.

Full text

Abstract:

Colloidal macromolecular organic matter (COM), which makes up a large portion of the bulk dissolved organic matter (DOM) in marine environments, has the capability to modify the bioavailability of potentially toxic metals to aquatic organisms. In order to better understand the bioavailability of some of these metals to estuarine bivalves, American Oysters (Crassostrea virginica) were exposed to different types of natural colloidal (COM) and model (alginic acid, carrageenan, and latex particles) organic biopolymers, tagged with gamma-emitting radioactive metal ions (110mAg, 109Cd, 57Co, 51Cr, 5

APA, Harvard, Vancouver, ISO, and other styles

25

Fairhurst, Andrew Jonathan. "The role of inorganic colloids in the transport of toxic metals through the environment." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/27861.

Full text

Abstract:

Inorganic colloids are considered as potential transporters of toxic metals in the geosphere. If inorganic colloids are stable and able to adsorb toxic metals they may enhance their apparent solubility. If these colloids are mobile in the aquatic environment they may also enhance the transport of toxic metals. It is therefore of considerable interest to determine the characteristics of inorganic colloids in relation to toxic metal transport.

APA, Harvard, Vancouver, ISO, and other styles

26

Hassan, Sajid. "Emissions of nitrogen oxides, particulates and toxic metals from fossil-and -waste-fired combustors." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267994.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Paris, Josephine Rosanna. "Brown trout and toxic metals : local adaptation to the legacy of Britain's mining history." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/29554.

Full text

Abstract:

The effect of human activity on the natural world is increasingly shaping the evolution of species. The capacity of evolution to occur in individuals of a species, via natural selection acting on the genotypes of local populations through successive generations, is known as local adaptation. In southwest England, historical mining activity has resulted in a patchwork of highly metal-contaminated rivers across the region. Where the ecological diversity in many of these rivers has been decimated, metal-tolerant brown trout (Salmo trutta L.) populations seem to thrive. What are the mechanisms und

APA, Harvard, Vancouver, ISO, and other styles

28

Kousehlar, Masoomeh. "Isotopic source apportionment of atmospheric toxic metals in urban and industrial settings using biomonitors." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1618418916924712.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Ястремська, Лариса Сергіївна, І. Прекрасна, О. Таширев, and г. Снєгур. "Resistance of Negev desert microbial community to Cu2+ and Hg2+." Thesis, National Aviation University, 2013. http://er.nau.edu.ua/handle/NAU/38607.

Full text

Abstract:

The aim of the work is to evaluate the ability to keep stabile functioning of microbial community of Negev Desert clay (Israel) in the presence of typical for damaging effect toxic metals - Cu2 + and Hg2+ . The results show the stability of Negev desert microbial community to the extremely high bactericidal concentrations of toxic metals (1000 mg/l Cu2+and 10 mg/l Hg2+), despite the trace concentrations of these metals (0,23 mg/l Cu2+) in the desert ecosystem. This indicates a high resistance and ability of microbial cenosis to adapt to extreme factors. It can be supposed, ac

APA, Harvard, Vancouver, ISO, and other styles

30

Boex, Toby John. "Antimony, cadmium, lead and mercury in the prenatal and postnatal period." Thesis, University of Wolverhampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300987.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Scott, Mark Anthony. "Studies on the transmission of metals through some crop plants and to insect herbivores." Thesis, University of Hertfordshire, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369236.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Ondigo, Dezzline Adhiambo. "Polymer based electrospun nanofibers as diagnostic probes for the detection of toxic metal ions in water." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1018261.

Full text

Abstract:

The thesis presents the development of polymer based electrospun nanofibers as diagnostic probes for the selective detection of toxic metal ions in water. Through modification of the chemical characteristics of nanofibers by pre- and post-electrospinning treatments, three different diagnostic probes were successfully developed. These were the fluorescent pyridylazo-2-naphthol-poly(acrylic acid) nanofiber probe, the colorimetric probe based on glutathione-stabilized silver/copper alloy nanoparticles and the colorimetric probe based on 2-(2’-Pyridyl)-imidazole functionalized nanofibers. The prob

APA, Harvard, Vancouver, ISO, and other styles

33

Линдіна, Юлія Миколаївна, Юлия Николаевна Лындина, Yuliia Mykolaivna Lyndina, et al. "The study of the toxic effect of the heavy metals salts on the erythropoiesis in the rats." Thesis, Springer, 2020. https://essuir.sumdu.edu.ua/handle/123456789/81318.

Full text

Abstract:

Heavy metals salts (HMS) are the most common pollutants that are proved to have the negative effect. The objective is to determine the morphological features of the marrow in rats, caused by the combined effect of the heavy metals salts.

APA, Harvard, Vancouver, ISO, and other styles

34

Rangel-Mendez, J. R. "Adsorption of toxic metals from water using commercial and modified granular and fibrous activated carbons." Thesis, Loughborough University, 2001. https://dspace.lboro.ac.uk/2134/7544.

Full text

Abstract:

Commercial granular and fibrous activated carbons have been studied for the removal of heavy metals from aqueous solutions. A wood based activated carbon (AUG WHK) and an activated carbon cloth (KoTHmex TC-66 C) based on polyacrylonitrile fibre as a precursor, were oxidised for different periods of time using nitric acid, ozone and electrochemical methods to introduce various acidic groups at the surface, thereby, enhancing metal binding capacity. Modified samples were subsequently studied for the specific removal of cadmium and mercury ions in solution and compared with the performance of a c

APA, Harvard, Vancouver, ISO, and other styles

35

Ghaderian, Seyed Majid. "The effect of toxic heavy metals upon fungi of the genus Pythium isolated from soil." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301558.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Daka, Erema Ransome. "Population differences in the toxic effects of heavy metals to Littorina saxatilis olivi (prosobranchia: Mollusca)." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320573.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Vale, Maria do Socorro. "RemoÃÃo de Cromo e Zinco por Aspergillus niger." Universidade Federal do CearÃ, 2010. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4573.

Full text

Abstract:

CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>Os microrganismos tÃm sido amplamente estudados para remoÃÃo de diversos contaminantes em Ãguas residuÃrias, dentre eles os metais pesados. Este estudo tem como abordagem principal a remoÃÃo de metais tÃxicos pelo fungo filamentoso Aspergillus niger isolado do efluente de uma indÃstria petroquÃmica. A pesquisa foi dividida em duas partes: a primeira foi a verificaÃÃo do efeito da toxicidade Zn(II) e Cr(VI) pelo fungo estudado, jÃ que estes poluentes podem causar distÃrbios Ãs atividades microbianas e vir a comprometer ambientes pol

APA, Harvard, Vancouver, ISO, and other styles

38

Avanzi, Ingrid Regina. "Estudo da atividade microbiana na biorremediação de metais tóxicos na região Amazônica." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/106/106132/tde-21022017-153529/.

Full text

Abstract:

Nas últimas décadas o crescimento industrial decorrente do desenvolvimento tecnológico e outras atividades consideradas indispensáveis à vida humana, estão gerando graves problemas ambientais, que está despertando uma preocupação a nível mundial. Dentre os vários contaminantes os metais tóxicos têm recebido atenção especial, pela sua persistência ao ingressar nos ecossistemas acumulando-se por toda a cadeia alimentar, uma vez que são extremamente tóxicos, mesmo em quantidades muito baixas. No Brasil, a legislação ambiental vigente já estabele

APA, Harvard, Vancouver, ISO, and other styles

39

Kede, Maria Luiza Félix Marques. "O uso de fosfatos associado à fitorremediação em solos de Santo Amaro (BA) contaminados por metais tóxicos." Universidade do Estado do Rio de Janeiro, 2014. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7179.

Full text

Abstract:

Universidade do Estado do Rio de Janeiro<br>A contaminação do solo no município de Santo Amaro (BA) por metais tóxicos provocada pelas atividades da empresa Plumbum Mineração tem gerado impactos sobre a saúde ambiental e humana. O objetivo da presente pesquisa foi avaliar a viabilidade da remediação deste solo contaminado por chumbo e cádmio, utilizando diferentes fontes de fosfatos e fitorremediação com o capim vetiver [Vetiveria zizanioides (L.)]. O estudo foi realizado em colunas de PVC onde amostras de solo foram colocadas com a aplicação de fosfato dihidrogênio de potássio (KH2PO4) (T1);

APA, Harvard, Vancouver, ISO, and other styles

40

Carnahan, Elizabeth A. "Foraminiferal assemblages as bioindicators of potentially toxic elements in Biscayne Bay, Florida." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Wilhelmi, Brendan Shane. "The removal and recovery of toxic and valuable metals from aqueous solutions by the yeast Saccharomyces cerevisiae." Thesis, Rhodes University, 1998. http://hdl.handle.net/10962/d1004062.

Full text

Abstract:

This project considered the use of the yeast Saccharomyces cerevisiae as a biosorbent for the removal and recovery of a range of metals from contaminated waters. S. cerevisiae, as a biosorbent, has the potential to provide a cost effective, selective and highly efficient purification system. Initial studies focused on metal accumulation by an immobilized baker's S. cerevisiae biosorbent. The parameters affecting metal uptake were investigated, these included metal concentration, time and solution pH. Metal uptake was rapid. Gold and cobalt reached saturation within 5 min of contact with the bi

APA, Harvard, Vancouver, ISO, and other styles

42

Pham, Xuan Qui. "New Optical Sensing for the Detection of Toxic Cations : Cesium, Uranyl and Arsenic." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLN005.

Full text

Abstract:

Ce travail concerne la synthèse, les études des propriétés photophysiques et de complexation des molécules fluorescentes pour la détection sélective de cations toxiques tels que le césium, l'uranyle et l'arsenic. Tout d'abord, deux nouveaux capteurs fluorescents pour le césium, Calix-COU-P et Calix-COU-Benz-CN, comportant le Calix[4]arène-couronne-6 et le fluorophore coumarine ont été synthétisés avec succès. En ce qui concerne le Calix-COU-P, une forte exaltation de fluorescence et un déplacement bathochrome d'absorption ont été observés en présence de césium dans l'eau. Une très bonne limite

APA, Harvard, Vancouver, ISO, and other styles

43

Melo, Diego de Quadros. "LIGNOCELLULOSIC ACTIVATED WASTE USE ADSORBENTS IN TOXIC METALS IONS REMOVAL: BATCH AND COLUMN STUDIES USING DESING EXPERIMENTAL." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=17236.

Full text

Abstract:

FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>The tururi and buriti fibers, and the castor bean stalks are extremely efficient to sorption of metal ions from aqueous solutions. In this study, the adsorbents were activated with different concentrations of alkali solutions (5, 7, 10 and 15% w/v). The materials were characterized by analytical techniques as infrared, X-ray Diffraction (XRD) and Thermogravimetry analysis. The infrared spectra revealed that associated groups to macromolecules of hemicellulose and lignin after alkaline activation have less intensity compa

APA, Harvard, Vancouver, ISO, and other styles

44

Robson, Thomas. "Weathering of sulfide ores in model soils, potentially toxic element release and bioavailability." Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/2859.

Full text

Abstract:

The exploitation of metallic sulfide ores produces vast quantities of fine-grained wastes hosting potentially toxic elements (PTEs). There are concerns that, if improperly disposed of and managed, waste mineral particles can behave as vectors that disperse PTEs via aeolian and fluvial transport, subsequently contaminating soils and crops used to support human populations. The importance of these particles, as sources and influencers of PTE biogeochemistry in productive soils, has received limited research. Long-term (365 d) batch incubation experiments, field weathering experiments and phytoav

APA, Harvard, Vancouver, ISO, and other styles

45

Kgabi, Nnenesi Anna. "Monitoring the levels of toxic metals of atmospheric particulate matter in the Rustenburg district / Nnenesi Anna Kgabi." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1504.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Ibiam, Udu Ama. "Toxic effects of metals on Caenorhabditis elegans : do biomarkers correlate with individual performance and population level effects?" Thesis, University of East Anglia, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410247.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Green, J. M. "The effect of toxic metals on the biochemistry, physiology and morphology of Enteromorpha thalli, spores and germlings." Thesis, University of the West of England, Bristol, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355853.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Pinaeva, Uliana. "Functionalized track-etched PVDF membrane-electrodes for toxic metal determination in water." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX048.

Full text

Abstract:

Le greffage radio-induit de polymères fonctionnels, tels que le poly(acide acrylique) (PAA), la poly(4-vinyl pyridine) (P4VP) et le poly(bis[2-(methacryloyloxy)ethyl] phosphate (B2MP), dans la structure nanoporeuse de membranes en poly(fluorure de vinylidène) (PVDF) à traces attaquées est ici rapporté, l’objectif étant la pré-concentration sélective des ions Pb(II), Hg(II) et U(VI) en solution dans l’eau. Les membranes en PVDF à traces attaquées sont fabriquées par irradiation aux ions lourds rapides suivie par la révélation chimique des traces. Les membranes nanoporeuses en PVDF ainsi créées

APA, Harvard, Vancouver, ISO, and other styles

49

Araujo, Eloá Moura. "Bioconcentration and desorption kinetic of potentially toxic elements in soils cultivated with horticultural crops in organic and conventional systems." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-18052018-114411/.

Full text

Abstract:

Potentially toxic elements (PTEs) can be absorbed and accumulated in vegetables organ and tissues, and this is an important channel through which PTEs can enter into the food chain. Soil management may interfere in the behavior of PTEs in the system. So, the study of the dynamics of elements in the soil is fundamental to a better understanding of factors that influence soil-plant transfer. In the state of Pernambuco, Brazil, the production of vegetables is mainly concentrated in small or medium organic and conventional farms located in the Agreste and Sao Francisco regions. Our aims in this re

APA, Harvard, Vancouver, ISO, and other styles

50

Howlett, Niall G. "The effects of altered membrane fatty acid composition on the toxic interactions of heavy metals with Saccharomyces cerevisiae." Thesis, Oxford Brookes University, 1998. https://radar.brookes.ac.uk/radar/items/ba46f6e3-f663-49af-9870-96fc8a28bc23/1/.

Full text

Abstract:

The effects of altered membrane fatty acid composition on the toxic interactions of heavy metals with Saccharomyces cerevisiae were examined. Saccharomyces cerevisiae was enriched with the polyunsaturated fatty acids (PUFAs) linoleate (18:2) and linolenate (18:3) by growth in 18:2- or 18:3-supplemented medium. Incorporation of the exogenous PUF As resulted in them comprising greater than 65% and 40% of the total fatty acids in whole-cell and plasma membrane lipids, and nuclear membrane lipids, respectively. Incorporation of the exogenous PUF As had no discernible adverse effects on cell divisi

APA, Harvard, Vancouver, ISO, and other styles

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!