Environmental Impacts of Mine Waste Contamination in a River Floodplain - Arsenic Plant Uptake, Effects on Microbial Communities, and Reductive Solubilization PDF Download
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Author: Michael Simmler
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ISBN:
Category :
Languages : en
Pages :
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Author: Michael Simmler
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages :
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Author: RobertE. Redmann
Publisher: Routledge
ISBN: 1351450646
Category : Technology & Engineering
Languages : en
Pages : 370
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Research funded by the Centre for Resource Studies,Queen's University, Kingston, Ontario, Canada
Author: Karen A. Hudson-Edwards
Publisher:
ISBN: 9781844329663
Category : Contaminated sediments
Languages : en
Pages : 64
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Book Description
This is a review of how sediments have been polluted by abandoned metal mines. Recommened actions are also discussed.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 598
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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309086256
Category : Technology & Engineering
Languages : en
Pages : 433
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Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. The concept of bioavailability has recently piqued the interest of the hazardous waste industry as an important consideration in deciding how much waste to clean up. The rationale is that if contaminants in soil and sediment are not bioavailable, then more contaminant mass can be left in place without creating additional risk. A new NRC report notes that the potential for the consideration of bioavailability to influence decision-making is greatest where certain chemical, environmental, and regulatory factors align. The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. Finally, the intimate link between bioavailability and bioremediation is explored. The report concludes with suggestions for moving bioavailability forward in the regulatory arena for both soil and sediment cleanup.
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Category :
Languages : en
Pages : 0
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Abstract : Arsenic is one of the most toxic environmental pollutants, classified as a Class I carcinogen. Anthropogenic activities such as industrial and agricultural applications have led to an increase in arsenic contamination of soils. The work presented here is a systematic approach to evaluating and mitigating the health impacts of arsenic and exploring the role of the root microbiome of the arsenic hyperaccumulating plant, the Chinese Brake fern (Pteris vittata L.), in enhanced arsenic uptake and tolerance. This research deals with three aspects of soil arsenic pollution, 1. Determine the human health impact of arsenic due to contact exposure using a human skin cell culture model, 2. Develop a novel phytoremediation technique to mitigate arsenic exposure through rice consumption, and 3. Exploring the plant-microbe interactions in enhancing arsenic tolerance and uptake by the hyperaccumulator, P. vittata. We used human skin cell culture and soil geochemical techniques to determine the effect of soil arsenic exposure through dermal contact. Immokalee soil from Florida was spiked with four concentrations of arsenic based on ten-year use of arsenical pesticides. Our data indicated that keratinocyte cells were more susceptible to arsenic-induced cellular transformation than fibroblasts. In addition, higher concentrations of soil arsenic impacted specific cellular responses such as cell viability, cell migration, and epithelial-to-mesenchymal transition, and induced changes in the expression of proteins related to these functions. The in-vitro model developed in this study can be used as a quick, inexpensive, and reliable approach to determine the toxicity of soil contaminants. Exposure to arsenic from a diet of contaminated rice is a widespread problem and a serious concern in several parts of the world. We developed a crop rotation method of alternating rice with the arsenic hyperaccumulator, P. vittata, to reduce arsenic concentrations in rice grains. Our results show that at the end of two crop rotation cycles, there was a 67% and 35% decrease in arsenic in rice grains and soil, respectively. Interactions between hyperaccumulators and metal(oid)-resistant microbes in the rhizosphere have generated much research interest due to their application potential in plant-based environmental remediation techniques. We compared root endophytic, rhizospheric and bulk soil microbial communities between P. vittata and non-accumulator Pteris ensiformis Burm. Arsenic-tolerant bacteria like Steroidobacter, Cohnella, and Streptomyces were present in the root endophytes of P. vittata but absent in P. ensiformis. These findings suggest that the arsenic hyperaccumulator specifically recruits a microbial community that enhances its tolerance and uptake of arsenic. The root microbiome of hyperaccumulators could provide valuable insight into improving the efficiency of metal uptake in plants growing in polluted soil.
Author:
Publisher:
ISBN:
Category : Pollution
Languages : en
Pages : 690
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Book Description
Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.
Author:
Publisher:
ISBN:
Category : Arsenic
Languages : en
Pages : 124
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Book Description
V.3 ... consists of individual chapters that describe 1) the conceptual background for radionuclides, including tritium, radon, strontium, technetium, uranium, iodine, radium, thorium, cesium, plutonium-americium and 2) data requirements to be met during site characterization.
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 2324
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Book Description
Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
