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Dissertations / Theses on the topic 'Bioaccumulation factor'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Cantu, Mark. "Shortened in Vivo Bioconcentration Factor Testing in Cyprinus Carpio." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc407781/.

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Bioconcentration factor testing serves as the most valuable surrogate for the assessment of bioaccumulation. The assessment of potentially harmful chemicals is crucial to not only the health of aquatic environments, but to humans as well. Chemicals that possess the ability to persist in the environment or that have the potential to bioaccumulate, pose a greater risk to organisms that are exposed to these chemicals. The Organization for Economic Cooperation and Development Guideline 305 outlines specific protocols to run an accurate and reliable aquatic flow-through test. However, since its ado

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2

POMA, GIULIA. "Evaluation of bioaccumulation processes of brominated flame retardants in biotic matrices." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/50902.

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The global reduction in the use of PBDEs and HBCD as flame retardants has opened the way for the introduction of “Novel” BFRs (NBFRs) in place of the banned formulations, indicating those BFRs that are new in the market or newly/recently observed in the environment in respect to PBDEs and HBCD. Consequently, consumption and production of these NBFRs will keep rising, and increasing environmental levels of these chemicals are expected in the near future. Important representatives of this group are decabromodiphenyl ethane (DBDPE), 1,2-bis(2,4,6-tribromophenoxy) ethane (BTBPE), hexabromobenzene

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3

Šmídová, Klára. "Kinetika příjmu hydrofobních organických látek v žížale Eisenia andrei v půdách s rozdílným obsahem organického uhlíku." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240524.

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This thesis is concerned with the fate of hydrophobic organic pollutants (HOCs) in soil. The theoretical part summarizes the current knowledge about bioavailability, factors influencing the bioavailability and methods for its measurement. Attention is paid to the organic carbon content, which is considered to be one of the key factors and to the influence of microorganisms that can degrade or interact with the substances, thus changing their bioavailable ratio. The practical part of the thesis uses bioaccumulation test with earthworm Eisenia andrei for evaluating the uptake kinetics HOCs in th

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4

Silva, Renata Maria Goulart da. "Acúmulo de metais-traço no sedimento e em organismos da megafauna bentônica na Baía do Almirantado, Ilha Rei George, Antártica." Niterói, 2017. https://app.uff.br/riuff/handle/1/4783.

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Submitted by Biblioteca de Pós-Graduação em Geoquímica BGQ (bgq@ndc.uff.br) on 2017-10-04T15:44:46Z No. of bitstreams: 1 tese_renata_maria_completa.pdf: 1532064 bytes, checksum: db3c7a043c5eecc779b264a3e956dea2 (MD5)<br>Made available in DSpace on 2017-10-04T15:44:46Z (GMT). No. of bitstreams: 1 tese_renata_maria_completa.pdf: 1532064 bytes, checksum: db3c7a043c5eecc779b264a3e956dea2 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Universidade Federal Fluminense. Instituto de Química. Programa de Pós-Graduação em Geoquímica, Niterói, RJ<br>Nos últimos anos observa-se

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5

Dutton, Michael Darwin. "Methyl mercury bioaccumulation, a study of factors influencing uptake and elimination in fish." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0011/NQ30604.pdf.

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6

Lovy, Lucie. "Hyperaccumulation du Cadmium par Noccaea caerulescens : cinétique, répartition et prédiction." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0315/document.

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La prédiction du transfert de cadmium du sol à la plante passe par l'élaboration d'un modèle décrivant la dynamique du métal dans le végétal. Cette thèse analyse les cinétiques d'accumulation du Cd dans Noccaea caerulescens, à l'échelle de la plante entière, de ses organes et au cours de son cycle de végétation. Elle cherche également à établir un modèle prédictif simple, fondé sur les relations entre concentrations d'exposition et en Cd dans la plante. Lorsque N. caerulescens est exposée à une concentration constante en conditions contrôlées, l'allocation de biomasse et la translocation du Cd

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7

Handy, Andrea Renee. "Acute Toxicity and Immunotoxicity Testing of Total Petroleum Hydrocarbons in Aquatic and Terrestrial Organisms." Wright State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=wright1185910580.

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8

Westcott, Kim. "Environmental factors affecting methyl mercury accumulation in zooplankton." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23305.

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Filter-feeding macrozooplankton were collected from 24 lakes in south-central Ontario to examine relationships between environmental factors and methyl mercury accumulation. Zooplankton methyl mercury levels ranged from 19 to 448 ng$ rm cdot g sp{-1}$ dry weight in the study lakes and were highest in zooplankton from acidic brownwater lakes. Water color and lake water pH were the best predictors of methyl mercury levels in zooplankton explaining 73% of the variation. Methyl mercury concentrations were positively correlated with water color and inversely correlated with lake water pH. Water col

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9

Mitchell, Justin Bradford Bayne David Roberge. "Factors influencing bioaccumulation of polychlorinated biphenyls in six fish species in Logan Martin Reservoir, Alabama." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/MITCHELL_JUSTIN_27.pdf.

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10

Moore, Bronwyn Ann. "Metal bioaccumulation and precious metal refinery wastewater treatment by phoma glomerata." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1009441.

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The biosorption of copper, nickel, gold and platinum from single metal aqueous solutions by the nickel hyperaccumulator Berkheya coddii plant biomass was investigated. Potentiometric titrations of the biomass and determination of optimal sorption pH for each metal showed that nickel ions were released from the biomass into solution. The presence of free nickel ions interfered with the uptake of the other three metals and further biosorption investigations were discontinued. Three fungal isolates found colonising metal solutions were cultured and screened for their ability to remove 50 mg.l⁻¹ o

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11

Millegård, Markus. "Mercury concentration in Baltic herring, Clupea harengus, coupled to abiotic environmental factors : A study using monitoring data." Thesis, Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-19515.

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Earlier studies on the relationship between mercury concentration in fish – or alternatively bioavailability of mercury in aquatic systems – and different abiotic oceanographic factors such as water temperature, pH and salinity, have shown that such associations often exist. The results are not always consistent between studies, however. The aim of this study is to investigate if this type of relationships can be established in Baltic herring, Clupea harengus, with the use of temporal monitoring data from the northern Bothnian Bay (northern Sweden), compiled within Swedish monitoring programm

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12

Stoeckel, Denise Boulet. "The Effect of Environmental Factors on The Bioaccumulation of Neutral, Lipophilic Organic Compounds by The Midge, Chironomus riparius /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487928649989513.

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13

Urien, Nastassia. "Modélisation de la bioaccumulation des métaux par voie dissoute chez le genre Gammarus : influence des facteurs environnementaux et de l’histoire de vie des organismes." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10242/document.

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L'utilisation du biote dans le suivi de la contamination métallique des milieux aquatiques est aujourd'hui une approche pertinente, car elle permet (i) de répondre aux difficultés analytiques liées à la présence des métaux à faible dose dans l'eau, (ii) d'intégrer la contamination dans le temps et (iii) de renseigner sur la biodisponibilité des métaux et leur potentiel toxique. Toutefois, l'interprétation des niveaux de contamination des organismes en termes de contamination biodisponible des milieux est difficile car elle dépend de facteurs confondants (physicochimiques et biologiques). Dans

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14

Kalhok, Sarah Jill Gwennette. "Influence of biological factors on cadmium bioaccumulation and metallothionein concentrations in natural populations of the freshwater mussel Pyganodon grandis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq40888.pdf.

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15

Das, Shagnika. "Effects of environmental factors on the eco-physiology and life traits of a macro-crustacean (shrimp) and micro-crustacean (copepod)." Thesis, Lille, 2019. http://www.theses.fr/2019LIL1R015.

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La présente thèse comprend deux grandes sections, la première traitant des macro-crustacés, la crevette de vase Austinogebia edulis et la seconde des micro-crustacés, le copépode Eurytemora affinis. Les objectifs étaient de 1. Explorer le rôle d’A. edulis en tant qu’ingénieur écologique, 2. Effets du Cd sur les enzymes oxydatives et la morphologie d’A. edulis, 3. Évaluer la variation spatiale et temporelle des polluants organiques persistants (POP) dans l’habitat naturel d’A. edulis, 4. Explorer l’effet d’un cocktail de 4 métaux lourds sur E. affinis et décrire l’effet des sédiments en suspens

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16

Cid, Puey Núria. "Ecology of the benthic macroinvertebrates in the lower Ebro River: community characterization, population dynamics and bioaccumulation of pollutants in response to environmental factors / Ecologia dels macroinvertebrats bentònics al tram baix del riu Ebre: caracterització de la comunitat, dinàmica de poblacions i bioacumulació de contaminants en resposta a factors ambientals." Doctoral thesis, Universitat de Barcelona, 2010. http://hdl.handle.net/10803/37309.

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The effects of the main anthropogenic impacts in the fluvial ecosystem of the lower Ebro River are evaluated along the five chapters of the present thesis, using the benthic macroinvertebrate community as a bioindicator. Different approaches are integrated in function of the type of stressor, considering mainly heavy metal and organochlorine pollution and hydrological alterations. These approaches focus on the taxonomy and biological traits of the community, and on the bioaccumulation of pollutants, population and life history studies on keystone species such as Ephoron virgo (Ephemeroptera: P

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17

Das, Shagnika. "Effects of environmental factors on the eco-physiology and life traits of a macro-crustacean (shrimp) and micro-crustacean (copepod)." Electronic Thesis or Diss., Université de Lille (2018-2021), 2019. http://www.theses.fr/2019LILUR015.

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La présente thèse comprend deux grandes sections, la première traitant des macro-crustacés, la crevette de vase Austinogebia edulis et la seconde des micro-crustacés, le copépode Eurytemora affinis. Les objectifs étaient de 1. Explorer le rôle d’A. edulis en tant qu’ingénieur écologique, 2. Effets du Cd sur les enzymes oxydatives et la morphologie d’A. edulis, 3. Évaluer la variation spatiale et temporelle des polluants organiques persistants (POP) dans l’habitat naturel d’A. edulis, 4. Explorer l’effet d’un cocktail de 4 métaux lourds sur E. affinis et décrire l’effet des sédiments en suspens

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18

Vicente, Anne. "Développement d’un réseau trophique microbien standardisé pour l’évaluation de l’impact des contaminants sur les écosystèmes dulçaquicoles." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0355.

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Dans le cadre de l’évaluation du risque, des tests d’écotoxicité plus représentatifs de la réalité environnementale tenant compte de la complexité des écosystèmes doivent être développés. Malgré l’importance des microorganismes dans les écosystèmes et les processus fonctionnels associés, ceux-ci restent trop peu considérés dans les tests d’écotoxicité. Le principal objectif de cette thèse a donc été le développement d’un réseau trophique microbien modèle pour évaluer l’impact des contaminants sur les écosystèmes dulçaquicoles. Ce réseau est composé de rotifères (Brachionus calyciflorus, consom

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19

Fritsch, Clémentine. "UTILISATION INTEGREE DE BIOINDICATEURS POUR LA SURVEILLANCE DES SOLS ET DES ECOSYSTEMES TERRESTRES." Phd thesis, Université de Franche-Comté, 2010. http://tel.archives-ouvertes.fr/tel-00524516.

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Le transfert et les effets de 3 éléments traces métalliques (ETMs : Cd, Pb et Zn) dans les réseaux trophiques terrestres ont été étudiés sur une zone de 40 km2 polluée par l'ancienne fonderie de Metaleurop Nord (France). Les objectifs étaient (i) d'identifier les principaux facteurs expliquant les concentrations en ETMs dans les sols et les animaux étudiés, de déterminer à quelles échelles spatiales ces facteurs interviennent et si le paysage module les contaminations; (ii) de mesurer les réponses des espèces étudiées à différents niveaux d'organisation biologique et de rechercher des liens en

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20

Mashau, Aluwani Shiridor. "Quantification of the bioccumulation potential of various chemical elements from coal fly ash using Brassia juncea and Spinacia oleracea L and its implication for phytoremediation of coal fly ash dumps." Diss., 2017. http://hdl.handle.net/11602/908.

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MENVSC<br>Department of Ecology and Resource Management<br>South Africa is highly dependent on coal for production of electricity. The combustion of coal for electricity generation produces waste by-products which include fine ash (fly ash) and coarse ash. Fly ash (FA) is produced in large amounts while its utilization is low due to its classification as a hazardous material. Sasol produces about 7 million tons of FA, while Eskom produces about 28 million tons of coal FA annually. FA is a fine by-product from pulverized coal with detrimental effects on plants, soil or land, animals and human b

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21

(5930915), Sarah A. Vaughn. "THE UPTAKE AND EFFECTS OF POLY- AND PERFLUOROALKYL SUBSTANCES ON LARVAL AND JUVENILE AMPHIBIANS." Thesis, 2019.

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Poly- and perfluoroalkyl substances (PFAS) are ubiquitous contaminants across the globe, can bioaccumulate in aquatic taxa, and potentially biomagnify in food webs. Consequently, research examining the influence of PFAS on wildlife is warranted. Amphibians are sensitive to contaminants such as PFAS because of their porous skin and associations with aquatic habitats where contaminants accumulate. Because PFAS tend to bioaccumulate and can adversely affect the endocrine system, there is a need to examine uptake rates to inform ecotoxicology studies, as well as a need to examine sublethal effects

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22

Anyasi, Raymond Oriebe. "Bioremediation of polychlorinated biphenyls (PCBs)-contaminated soil by phytoremediation with Chromolaena odorata(L) R.M. King and Robinson." Diss., 2012. http://hdl.handle.net/10500/6103.

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The ability of Chromolaena odorata propagated by stem cuttings and grown for six weeks in the greenhouse to thrive in soil containing different concentrations of PCB congeners found in Aroclor and transformer oil, and to possibly remediate such soil was studied under greenhouse conditions. Chromolaena odorata plants were transplanted into soil containing 100, 200, and 500 ppm of Aroclor and transformer oil (T/O) in 1L pots. The experiments were watered daily at 70% moisture field capacity. Parameters such as mature leaves per plant, shoot length, leaf colour as well as the root length at harve

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23

Fuji, Takashi 1961. "Biotic and abiotic factors influencing the bioavailability of sediment-associated phenanthrene to marine amphipods." Thesis, 1997. http://hdl.handle.net/1957/28900.

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The "equilibrium partitioning theory" is one of the most widely used models to evaluate the bioavailability of sediment-associated, nonpolar, organic contaminants and it makes specific assumptions regarding the factors that influence this bioavailability. The objective of this research was to test two assumptions of this theory: (1) that benthic organisms are exposed to a constant, equilibrium-predicted concentration of a contaminant in interstitial water, regardless of the behavior of the organism; and (2) that exposure to interstitial water in a sediment exposure system is equivalent to the

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24

Nussey, Gail. "The effect of copper on the blood coagulation and general haematology of Oreochromis mossambicus (cichlidae)." Thesis, 2014. http://hdl.handle.net/10210/9997.

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M.Sc. (Zoology)<br>A number of chemical substances in mining, industrial, agricultural and domestic effluents are likely to contaminate watercourses. These toxicants have a definite effect on all aquatic life, even at sublethal concentrations. Due to the extensive copper mining activities in the Phalaborwa region, there is concern that the sublethal effect of copper might affect the physiology of fish in the Olifants River, Kruger National Park, Transvaal. Copper can be found as an essential micronutrient in nearly all waters, although anthropogenic sources such as metals from mining and plant

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