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Tesis sobre el tema "Effect of heavy metals on fish"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 20 de febrero de 2023

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1

Claus, Sonia Carmel, University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Heavy metals in biota from temperate Australian estuaries." THESIS_CSTE_SFH_Claus_S.xml, 2003. http://handle.uws.edu.au:8081/1959.7/503.

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The detection of anthropogenic impacts in our estuaries has become a critical social, political and scientific concern in recent years. Work has focussed on the effects of these impacts on the spatial and temporal patterns of biotic assemblages and searched for bioindicators and biomarkers of pollutants that may act as early warning signs. The estuaries in temperate Southeastern Australia have a diversity of biotic assemblages living in the soft sediment. One of the most abundant macroinvertebrates is the little studies mussel, Xenostrobus securi that is found living with an assemblage of bent

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2

Leung, Siu Ying. "Accumulation of DDTs, heavy metals and PBDEs in fish collected from fish ponds and mariculture zones of the Pearl River Delta, China." HKBU Institutional Repository, 2008. http://repository.hkbu.edu.hk/etd_ra/880.

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3

Martinez, Maria L. 1960. "Organochlorine Pesticides and Heavy Metals in Fish From the Trinity River, Texas." Thesis, University of North Texas, 1990. https://digital.library.unt.edu/ark:/67531/metadc500474/.

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The Trinity River passes through the Dallas-Fort Worth metroplex receiving point and non-point source contaminant loadings. Lepomis spp. were collected at twelve sampling locations in the Trinity River in August 1987 and September 1988 and analyzed for organochlorine pesticides and heavy metals. Results from the study were compared to existing U.S. FDA action and tolerance levels, LC50s, and historical data. Various longitudinal trends and some concentration patterns were observed. Continual study of pesticide and metal body burdens in fish allow testing for trends, and thereby, lead to a bett

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4

Johnson, Adam Nicholas. "Toxicological Comparison of Heavy Metal Salt and Semiconductor Nanoparticle Exposure in Zebrafish (Danio rerio)." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/JohnsonAN2007.pdf.

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5

Zhou, Hai Yun. "Evaluation of organochlorines and heavy metals in the Pearl River Delta and Hong Kong, with emphasis on bioaccumulation in freshwater fish." HKBU Institutional Repository, 1999. http://repository.hkbu.edu.hk/etd_ra/207.

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6

Adijaya, Mardan. "The effects of humic water, heavy metals and parasitism on freshwater teleost fish in West Kalimantan, Indonesia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ35466.pdf.

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7

Sherwood, Graham D. "Fish energetics in polluted ecosystems." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38280.

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Conventional wisdom in ecotoxicology predicts reductions in organismal fitness to follow from exposure-related physiological effects. This expectation may be appropriate for controlled laboratory environments, but may not necessarily reflect what is likely to take place in the wild. In an extensive review of the ecotoxicology literature, it was revealed that fish condition factor (an index of energetic fitness) is just as likely to respond favourably to pollutant exposure as it is to respond negatively. The remainder of this thesis examines some of the ecological reasons for this apparent para

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8

Merciai, Roberto. "Effects of global change on fish assemblages in Mediterranean streams." Doctoral thesis, Universitat de Girona, 2016. http://hdl.handle.net/10803/405192.

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L'objectiu d'aquesta tesi és de'explorar alguns aspectes de l'impacte humà sobre les poblacions de peixos i altres components dels ecosistemes fluvials Mediterranis de Catalunya. Es va mostrar com els peixos del Riu Llobregat acumulen quantitats significatives de metalls pesants, amb concentracions en el múscul que varien al llarg del riu i segons l'espècie i la talla dels peixos. En el Riu Tordera, afectat per l'extracció d'aigua, el règim de temperatures es veu alterat en correspondència dels trams intermitents, en els quals la probabilitat de supervivència i l'abundancia dels peixos , i en

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9

Andreikėnaitė, Laura. "Genotoxic and cytotoxic effects of contaminants discharged from the oil platforms in fish and mussels." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20101102_153642-57785.

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Aquatic ecosystems are still being polluted with crude oil and other technogenic contaminants. In order to evaluate genotoxic and cytotoxic impact of this pollutants, micronucleus test and analysis of the other nuclear abnormalities is rather frequently being used. The main objective of the study is assessment of genotoxicity and cytotoxicity effects in different fish and bivalves exposed to the crude oil and other technogenic contaminants discharged from the several oil platforms (Statfjord B, Oseberg C, Minija). Environmental genotoxicity and cytotoxicity was evaluated by measuring the frequ

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10

Van, Look Katrien Jo Warda. "The development of sperm motility and morphological techniques for the assessment of the effects of heavy metals on fish reproduction." Thesis, University of Sheffield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369940.

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11

Barst, Benjamin Daniel. "Hepatotoxicity of Mercury to Fish." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc31525/.

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Tissue samples from spotted gar (Lepisosteus oculatus) and largemouth bass (Micropterus salmoides) were collected from Caddo Lake. Gar and bass livers were subjected to histological investigation and color analysis. Liver color (as abs at 400 nm) was significantly correlated with total mercury in the liver (r2 = 0.57, p = 0.02) and muscle (r2 = 0.58, p = 0.01) of gar. Evidence of liver damage as lipofuscin and discoloration was found in both species but only correlated with liver mercury concentration in spotted gar. Inorganic mercury was the predominant form in gar livers. In order to de

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12

Ebrahimi, Mansour. "Effects of pollution on steroidogenesis and sperm in fish." Thesis, University of Sheffield, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389736.

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13

Wainaina, Steven. "Effect of heavy metals on syngas fermentation." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10203.

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The goal of this work was to establish the suitable and limiting concentrations of Zn, Cu and Mn compounds during syngas fermentation. The results showed that cells encased in polyvinylidene difluoride (PVDF) membranes had a faster accumulation of methane in reactors containing fermentation medium dosed with 5 mg/L of each heavy metal compared to free cells. It was also revealed that total inhibition of biohydrogen production occurred in medium containing 5 mg/L Cu, 30 mg/L Zn and 140 mg/L Mn while the most suitable metal concentration level was 0.1 mg/L Cu, 0.6 mg/L and 2.8 mg/L Mn. In additi

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14

Claus, Sonia Carmel. "Heavy metals in biota from temperate Australian estuaries /." View thesis, 2003. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20051013.092820/index.html.

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Thesis (Ph.D.) -- University of Western Sydney, 2003.<br>"Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy at the University of Western Sydney Hawlesbury" Bibliography : leaves 245-278.

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15

Morris, Thomas Colin. "Fish parasites as bio-indicators of heavy metals in two South African embayments." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/15608.

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The Cape Elephant fish (Callorhinchus capensis) and two common sand shark species (Rhinobatos annulatus and Rhinobatos blochii) were caught off False Bay and Saldanha Bay and surveyed for their parasite community in 2013 and 2014. The surveys were used to build species accumulation curves (SAC) and calculate biodiversity indices, particularly, rarefied species richness, Shannon Weiner's diversity index, Simpson's index and Pielou's J index. The biodiversity indices were correlated with the host's biological data and parasite infection data, to determine the parasite community structure and pro

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16

Omar, F. A. "The effect of heavy metals on growth of marine phytoplankton." Thesis, Swansea University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638366.

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A study has been made on the effect of zinc, calcium and copper on the growth and <SUP>14</SUP>C fixation of <i>Phaeodactylum tricornutum</i> and <i>Dunaliella primolecta</i>. Experiments were carried out to examine the uptake of <SUP>65</SUP>Zn by <i>Phaeodactylum</i> and <i>Dunaliella</i> in laboratory culture, to investigate the processes involved, its relationship to metabolism, and the factors affecting it. Also, experiments were carried out to investigate the effect of these metals on chlorophyll concentration and protein content of <i>Phaeodactylum</i> and <i>Dunaliella</i>. It has been

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17

Salah, Sharif Ali. "Heavy metals uptake by wheat under two transpiration rates." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33838.

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The present project aimed at measuring plant heavy metal uptake as a function of transpiration rates and dissolved heavy metal level in the soil solution. Two experiment was conducted separately in two season (Spring and Fall 2000). In these two experiments, young wheat plants ( Triticum aestivum) were irrigated with nine different solutions containing Cd and Zn. The study was conducted in two chambers where relative humidity was controlled to obtain two different levels of transpiration rates. Each control chambers contained 27 pots filled with sand and seeded with wheat plants, each nine tri

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18

Roach, John Paul. "Trace Metals in Fish From a Reservoir Receiving Runoff From a Developing Watershed." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/40820.

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The objective of this research was to measure the concentrations of the cadmium, chromium, copper, lead, mercury and zinc in bass and carp taken from the Occoquan Reservoir in Virginia with three purposes in mind. First, to determine whether the amounts of metals present represent any hazard to humans when the fish are used as food. Second, to assess the degree of change in the concentrations over time when compared with a previous study. Third, to discover whether the geographical patterns of metal concentrations point to source areas of elevated stream contamination. Fish were collected

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19

McCluskey, Seánín Marie. "The effect of heavy metals on antibiotic resistance in the environment." Thesis, University of Strathclyde, 2014. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=24354.

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Antibiotic resistance is a significant clinical problem, with bacterial infections becoming increasingly difficult to treat. Efforts, such as reducing the use of antibiotics, have proved unsuccessful, and we now face the prospect of a future without antibiotics. The natural environment acts as a reservoir for resistance genes. The selection and maintenance of resistance could counteract clinical efforts to reduce antibiotic resistance. Heavy metals have been linked to antibiotic resistance by genetic mechanisms whereby metals potentially select for and maintain antibiotic resistance, even in t

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20

Lawton, Michelle. "The effect of heavy metals on differentiated neuronal and glial cells." Thesis, Nottingham Trent University, 2007. http://irep.ntu.ac.uk/id/eprint/219/.

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Heavy metal poisoning poses a serious health risk among populations worldwide. The symptoms presented by exposure are varied and depend upon the species of the metal, the age of the individual and the exposure dose. All heavy metals have debilitating effects on the CNS. Children are especially sensitive to the neurological effects due to the intense growth and activity of a developing nervous system and inadequately developed defences. The aims of this study were to determine the effects of sub-lethal concentrations of numerous heavy metals on neuronal and glial cell differentiation. Using est

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21

Kwan, Sai-ping, and 關世平. "Heavy metals in Hong Kong rabbitfish (Siganus canaliculatus)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31221038.

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22

Wireko, A. A., Катерина Олексіївна Сікора, Екатерина Алексеевна Сикора, Kateryna Oleksiivna Sikora, Микола Сергійович Линдін, Николай Сергеевич Лындин, Mykola Serhiiovych Lyndin, Наталія Іванівна Гирявенко, Наталья Ивановна Гирявенко, and Nataliia Ivanivna Hyriavenko. "Heavy metals effect on the chemical composition variations in rat uterus tissue." Thesis, The Romanian National Library, 2020. https://essuir.sumdu.edu.ua/handle/123456789/81896.

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Heavy metals (HM) belong to our vital activity's chemical components, which can be essential, potentially dangerous, and dangerous. Their acceptable concentration present in all layers of the biosphere. Simultaneously, excessive environmental pollution causes the disruption of the living organism’s microecology and imbalanced accumulation of HM in the organs. Besides, it is rather difficult to predict the pollutant effect on the body, as the organs and systems may have different sensitivity. One of these organs that can be exposed to the impact of exogenous factors is the uterus. Moreover, the

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23

Al-Rasheid, Khaled A. S. "The effect of heavy metals on the marine ciliate Euplotes mutabilis (Tuffrau, 1960)." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358875.

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24

Sikora, Kateryna Oleksiivna, Світлана Григорівна Золотова, Светлана Григорьевна Золотова, Svitlana Hryhorivna Zolotova, Катерина Олексіївна Сікора, and Екатерина Алексеевна Сикора. "Dangerous of heavy metals spreading in the environment and their effect on uterus." Thesis, Sumy State University, 2020. https://essuir.sumdu.edu.ua/handle/123456789/77982.

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One of the problems of our century is the unfavorable environmental status. Among the large spectrum of pollutants, special attention is paid to the effect of heavy metal salts pollution. These chemical elements in background concentrations can be found in all layers of the ecosystem. Moreover, most of these microelements are essential for the functioning of the organisms. However, when heavy metals enter the body in high concentrations, they may obtain their toxic properties.

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25

Tomazelli, Andréa Cristina. ""Estudo comparativo das concentrações de cádmio, chumbo e mercúrio em seis bacias hidrográficas do Estado de São Paulo"." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/59/59139/tde-15032005-173014/.

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Concentrações de cádmio (Cd), chumbo (Pb) e mercúrio (Hg) foram determinadas em amostras de água (teores dissolvidos e particulados), sedimento de fundo, peixes e bivalves, coletados em seis bacias hidrográficas do Estado de São Paulo: Alto Paranapanema, Peixe, Aguapeí, São José dos Dourados, Mogi-Guaçu e Piracicaba, as quais apresentam diferentes características quanto ao uso e ocupação da terra. Dentre estas bacias, as dos rios Piracicaba e Mogi-Guaçu apresentam maiores densidades demográficas e industrialização, o que gera, conseqüentemente, maior degradação da qualidade das águas, enfatiza

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26

Сікора, Владислав Володимирович, Владислав Владимирович Сикора, Vladyslav Volodymyrovych Sikora, Микола Сергійович Линдін, Николай Сергеевич Лындин, Mykola Serhiiovych Lyndin, Наталія Іванівна Гирявенко, et al. "Effect of heavy metals on microstructural and microelemental changes in the rats urinary bladder." Thesis, Springer, 2020. https://essuir.sumdu.edu.ua/handle/123456789/81348.

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Global environmental pollution leads to the distribution of heavy metal salts (HMS) in the ecosystem and their impact on the organism. To study the influence of the heavy metals (HM) accumulation on the ultrastructural changes in rat’s urinary bladder (UB).

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27

Линдін, Микола Сергійович, Николай Сергеевич Лындин, Mykola Serhiiovych Lyndin, Анатолій Миколайович Романюк, Анатолий Николаевич Романюк, Anatolii Mykolaiovych Romaniuk, Роман Андрійович Москаленко, Роман Андреевич Москаленко, and Roman Andriiovych Moskalenko. "The effect of heavy metals accumulation on morphological and immunohistochemical features of breast cancer." Thesis, Springer, 2016. http://essuir.sumdu.edu.ua/handle/123456789/46490.

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Objective: The chemical composition determination of neoplastic breast :issue, study of prognostic-important receptors expression in the breast cancer cells, establishing linkages between all the derived indicators.

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28

Lan, Xiao Yu. "Rapid immunological detection of heavy metal cadmium in traditional Chinese medicine." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3952139.

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29

Stanley, Jean Frances. "Studies on the metal-containing granules in the mussels, Mytilus galloprovincialis and Velesunio angasi." Access via Murdoch Univeristy Digital Theses Project, 2003. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20040528.12421.

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30

Chen, Xuehui. "Accumulation of heavy metals and organochlorine pesticides in human milk and adipose tissues, and its health concerns." HKBU Institutional Repository, 2007. http://repository.hkbu.edu.hk/etd_ra/779.

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31

Ball, Jihane Sokhn. "The effect of heavy metals on the degradation of polycyclic aromatic hydrocarbons by soil microorganisms." Thesis, University of Surrey, 2005. http://epubs.surrey.ac.uk/842888/.

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This study aimed to assess the effect of heavy metals, especially Cu, Zn and Cd, on the ability of the white rot fungus (WRF) Bjerkandera sp. BOS55 and several soil bacterial isolates to degrade a selection of polycyclic aromatic hydrocarbons (PAHs). To investigate the effect of heavy metals on PAH degradation by Bjerkandera sp. BOS55, the fungus was grown in both a rich undefined medium and a defined medium containing the PAH pyrene and different concentrations of Cu or Cd. It was found that both metals reduced fungal growth and production of ligninolytic enzymes but that toxicity was modifie

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32

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.

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33

Линдіна, Юлія Миколаївна, Юлия Николаевна Лындина, Yuliia Mykolaivna Lyndina, Владислав Володимирович Сікора, Владислав Владимирович Сикора, Vladyslav Volodymyrovych Sikora, Микола Сергійович Линдін, 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.

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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.

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34

Maleri, Rudolf A. "The ability of terrestrial Oligochaeta to survive in ultramafic soils and the assessment of toxicity at different levels of organisation." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/1200.

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Thesis (PhD (Botany and Zoology)) -- University of Stellenbosch, 2006.<br>Metals are natural elements of the earth crust usually present at low concentrations in all soils. Although many metals such as cobalt, copper, iron and zinc are essential to living organisms, at elevated concentrations most metals are toxic to organisms living in and on soils. Elevated concentrations of metals are caused either by anthropogenic deposition following remobilisation from the earth crust or are of natural origin. Ultramafic soils do not only pose unfavourable living conditions such as drought and poor

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35

Nkqenkqa, Vuyiseka. "Metal and microbial contamination of agricultural soil and the Veldwachters River, Stellenbosch, South Africa." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2423.

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Thesis (MTech (Environmental Health))--Cape Peninsula University of Technology, 2017.<br>Surface water is used as a source of water supply in many countries, including South Africa. One of the sources of surface water pollution is leachate and surface runoff from landfills. In agricultural soils, the landfill runoff and leachate deteriorate the quality and affect the fertility of soil. The entry of metals and microorganisms from landfill leachate to adjacent environments is through surface runoff due to rainfall. Adverse effects on human- and environmental health triggers a need to monitor and

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36

Yuncu, Bilgen. "Effect Of Extracellular Polymer Composition Of Activated Sludge On The Removal Of Heavy Metals By Biosorption." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1087733/index.pdf.

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Activated sludge microorganisms can remove many hazardous substances from wastewater by adsorbing and concentrating them on their surfaces. Biosorption of these substances onto activated sludge surfaces are influenced by the chemical properties of the substance in question as well as the surface properties of the microorganisms. The purpose of this study is to identify the biosorption mechanisms of heavy metals and the effect of extracellular polymer (ECP) composition of activated sludge on the biosorption of Pb(II), Cd(II), Cu(II), Zn(II) and Ni(II). Microorganisms cultured under different gr

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37

Peppler, Jessica Elise. "The Effect of Heavy Metals on the Uptake of L-Histidine by the Polychaete Nereis Succinea." Thesis, University of Hawaii at Manoa, 2002. http://hdl.handle.net/10125/6957.

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Integumentary uptake of 3H-L-Histidine by Nereis succinea was measured in the presence and absence of selected heavy metals and inhibitors in 60% artificial seawater (ASW). At low concentrations of L-Histidine (10 uM), metals stimulated L-Histidine uptake from ASW. Higher concentrations of metal inhibited L-Histidine uptake. In amino acid kinetic experiments, 0.5 uM Zn2+ significantly (P < 0.003) increased both L-Histidine influx Jmax (control: 4.7 ± 0.4; treatment: 15.3 ± 1.7 nmol/g dry weight x 15 min), and Km (control: 23.8 ± 5.1; treatment: 44.0 ± 8.8 uM). Fe3+ (0.5 uM) stimulated influx o

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38

Edwards, Paula Kay. "The Correlation of the Concentration of Selected Metals Determined in Water and Fish Samples from a Public Pond." Digital Commons @ East Tennessee State University, 2010. https://dc.etsu.edu/etd/1774.

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The concentrations of heavy metals (Cd, Cu, Fe, Ni, Pb, Zn) were measured in water, and fish samples caught from the pond at Fishery Park in Unicoi County, TN. The water samples were collected once a week for 8 weeks. The amounts of metals in the muscle tissues, gill, and liver of the two fish species were measured. This was to determine if any correlation exists between the metal contents in water and those in the fish samples. The concentration ranges for the heavy metals found in the water samples are as follows: Zn 0.04-0.13; Cu, 0.00-0.00; Pb, 0.00-0.59; Cd, 0.0067-0.0071; Fe, 0.208-0.512

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39

Chiu, Ki Kin. "Using organic amendments and chelates for remediation of metal-contaminated soils by vetiveria zizanioides." HKBU Institutional Repository, 2003. http://repository.hkbu.edu.hk/etd_ra/417.

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40

Ho, Ching-yee Christina. "The biomonitoring of heavy metal pollution in the wood and leaf chemistry of urban trees in Hong Kong." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21089978.

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41

Ntuli, Themba Dominic. "Preparation of chemically modified Macadamia nutshells for adsorptive removal of selected heavy metals." Thesis, Vaal University of Technology, 2017. http://hdl.handle.net/10352/379.

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M. Tech. (Chemistry, Faculty of Applied and Computer Science), Vaal University of Technology<br>The abundance of agricultural waste materials has led to its use as adsorbents for trace metal adsorption. The raw Macadamia nutshell (RMN) powder was treated with a hydrochloric acid solution to obtain acid modified Macadamia nutshells (AMM), and with sodium hydroxide solution to obtain base modified Macadamia nutshells (BMM). Then, the AMM and BMM materials were grafted with 0.5 M, 1 M, and 2 M acrylic acid. The different AMM grafted materials were labelled 0.5 GAM, 1 GAM and 2 GAM representing th

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42

Hong, Wei. "Investigation on heavy metals and species of arsenic in natural Cordyceps sinensis." Thesis, University of Macau, 2008. http://umaclib3.umac.mo/record=b2162715.

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43

Clements, William H. "Community responses of aquatic macroinvertebrates to heavy metals in laboratory and outdoor experimental streams." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53937.

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This research describes aquatic macroinvertebrate community responses to heavy metals (copper, zinc) in experimental streams and at metal-impacted sites in the field. Experiments employed substrate-filled trays which were colonized in the field and then transferred to laboratory or outdoor streams. Laboratory experiments conducted over three seasons showed that acute (96 h) exposure to copper (Cu) at 15-32 μg Cu/L significantly reduced macroinvertebrate abundance and number of taxa during each season. Owing to differences in sensitivity among taxa, the percent composition of dominant groups

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Diouf, Aissatou. "Effect of Organic Amendments on Heavy Metal Distribution and Uptake in Vegetable Gardens in Senegal." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73036.

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The major constraints to food production in West Africa are related to the lack of suitable lands. Consequently, farmers incorporate organic amendments and wastewater to improve their yields. Within some limits, such wastes enhance soil fertility and can improve its physical properties. However, the advantages of using organic waste as fertilizer and soil amendment should be assessed with possible environmental and toxicological impacts due to the potential presence of heavy metals. The objective of this study was to assess the effect of organic amendments on heavy metal distribution in soils

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45

Peterson, Robert. "Interaction Effect of Filler Material on Fungal Biomass Activity for Heavy Metal Biosorption in Stormwater." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-14984.

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In the wake of ever more occurring and evident consequences brought by climate change such as droughts and an increasing world population, a responsible use and handling of freshwater has never been as important as before. Stormwater is more than often not treated and simply released back in nature with any kind of pollution it has collected on its way, one of which being heavy metals. By treating stormwater not only would this underutilised resource be made use of, creating a new source of freshwater, but environmental pollution caused by untreated stormwater could be potentially decreased, a

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46

Bateman, Mark J. "The uptake of heavy metals by aquatic macrophytes and the development of microsampling analytical techniques." Thesis, Coventry University, 1999. http://curve.coventry.ac.uk/open/items/82ba9974-f8fc-6290-40a7-3a64e63ff8a6/1.

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This thesis reviews literature relating both to the treatment of metal rich wastewaters by the use of constructed wetlands and the use of slurry analytical procedures for the determination of heavy metals in environmental micro-samples. A survey of metal contaminated wetland sites showed that aquatic plants maintain low levels of metals in aerial parts despite some very elevated sediment metal concentrations and extreme acidity. A series of greenhouse trials investigated the uptake of metals into aerial sections of Typha, Phragmites and Equisetum in long term hydroponic experiments. Phragmites

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47

Obbard, Jeffrey Philip. "The effect of heavy metals on microbial processes related to nutrient cycling in sewage sludged-amended soils." Thesis, Lancaster University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306430.

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Hagos, Mebrahtu T. "Effect of heavy metals on spawning and hatching of Penaeus indicus in KwaZulu-Natal (Amatikulu Prawn Farm)." Master's thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/6262.

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Includes bibliographical references.<br>Generally aquaculture continues to suffer from pollution and this has resulted in the decline of production. The effect of pollution can be directly on the organisations cultured causing immediate death or retarding their growth and making them vulnerable to a variety of diseases, or indirectly by reducing their reproductive capacity. This study was carried out to investigate the effect of zinc and lead on the hatched eggs, and zinc and copper on spawing and hatching of eggs from mature female Penaeus indicus. The experiment for each heavy metal was cond

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Serot, Julie Lynn. "Heavy metal analysis in Heaviside's dolphins (Cephalorhyncus heavisidii)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/193469.

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Skin and blubber tissue samples were collected from two hundred and six freeranging Heaviside’s dolphins (Cephalorhyncus heavisidii) during January through June of 2008, 2009, and 2010, along the coast of South Western Africa, to be analyzed for heavy metal concentration levels. Inductively coupled mass spectrometry (ICP-MS) was used to determine sample solution concentrations of all metals (aluminum, arsenic, cadmium, chromium, copper, iron, lead, manganese, mercury, nickel, selenium and zinc). Data provided by this thesis is the first reference of its kind for this species (Cephalorhyncus he

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Pheiffer, Wihan. "Investigating morphological changes in fish tissue, due to the presence of persistent organic pollutants and metals / W. Pheiffer." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9814.

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Levels of selected metals and persistent organic pollutants (POPs) were investigated in sediment and fillet tissue of the sharptooth catfish (Clarias gariepinus), from sites along the Orange-Vaal River system, South Africa. A histological assessment was done on the livers, kidneys, and gills of the fish sampled to determine morphological changes. The sediment and fish sampling sites were selected up- and downstream of major pollution sources such as mining, industrial and agriculture. The concentrations of the metals in the fish and sediment was determined with an inductively coupled plasma ma

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