Book ChapterDOI
Microorganisms and the Biological Cycling of Selenium
John W. Doran
- pp 1-32
TLDR
The role of microorganisms in the production and degradation of chemicals containing toxic elements has been studied in this article, where the authors focus on the potential toxicities and possible transformations in the environment.Abstract:
Most studies on the microbial transformations of elements have emphasized nutrient cycling within the biosphere or the economics of agricultural or industrial processes. Cyclic transformations within the biosphere between soluble, insoluble, and gaseous forms of carbon, nitrogen, hydrogen, oxygen, and sulfur are well known. Recently, attention has been focused on the role of microorganisms in the production and degradation of chemicals containing toxic elements (Alexander, 1973; Wood, 1974). Measures to increase animal and food crop production or disposal of waste materials can result in the introduction of elements in amounts harmful to terrestrial and aquatic ecosystems. Many elements and their compounds vary widely in both toxicity and mobility. Consequently, their safe disposal or effective recycling requires an understanding of their potential toxicities and possible transformations in the environment.read more
Citations
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Journal ArticleDOI
Bacillus arsenicoselenatis, sp. nov., and Bacillus selenitireducens, sp. nov.: two haloalkaliphiles from Mono Lake, California that respire oxyanions of selenium and arsenic
TL;DR: Two gram-positive anaerobic bacteria were isolated from the anoxic muds of Mono Lake, California, an alkaline, hypersaline, arsenic-rich water body and demonstrated weak growth as a microaerophile and was also capable of fermentative growth on glucose, while strain E1H is a strict anaerobe.
Journal ArticleDOI
Selenate Reduction to Elemental Selenium by Anaerobic Bacteria in Sediments and Culture: Biogeochemical Significance of a Novel, Sulfate-Independent Respiration
Ronald S. Oremland,James T. Hollibaugh,Ann S. Maest,Theresa S. Presser,Laurence G. Miller,Charles W. Culbertson +5 more
TL;DR: Results indicate that dissimilatory selenate reduction to elemental selenium is the major sink for selenia oxyanions in anoxic sediments and suggest application as a treatment process for removing selenio-oxyanions from wastewaters and also offer an explanation for the presence of selenite in oxic waters.
Journal ArticleDOI
Bioremediation of organic and metal contaminants with dissimilatory metal reduction
TL;DR: Dissimilatory metal reduction has the potential to be a helpful mechanism for both intrinsic and engineered bioremediation of contaminated environments.
Journal ArticleDOI
Ecology and Biotechnology of Selenium-Respiring Bacteria
TL;DR: This review focuses on microorganisms that use selenate and selenite as terminal electron acceptors, in parallel to the well-studied sulfate-reducing bacteria, and overviews the significant advancements made in recent years on the role of SeRB in the biological selenium cycle.
References
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Book
Atlas of Electrochemical Equilibria in Aqueous Solutions
TL;DR: The Atlas of Electrochemical Equilibria in Aqueous solutions as discussed by the authors is the most complete and complete work on aqueous solvents, which includes a detailed description of the properties of the solvers.
Journal ArticleDOI
Selenium as an integral part of factor 3 against dietary necrotic liver degeneration. 1951.
Klaus Schwarz,Calvin M. Foltz +1 more
Journal ArticleDOI
The Sulfur Cycle
TL;DR: The authors' model of the sulfur cycle can draw some conclusions that man is now contributing about one half as much as nature to the total atmospheric burden of sulfur compounds, but by A.D. 2000 he will be contributing about as much, and in the Northern Hemisphere alone he is more than matching nature.
Journal ArticleDOI
Atmospheric Dimethyl Sulphide and the Natural Sulphur Cycle
TL;DR: In this article, the authors suggest that DMS is the natural sulphur compound which fills the role originally assigned to H2S; that of transferring sulphur from the seas through the air to land surfaces.
Journal ArticleDOI
Biological cycles for toxic elements in the environment
TL;DR: The detoxification mechanisms of mercury are used as examples to demonstrate that there are biological cycles for the synthesis and degradation of toxic compounds and that the present knowledge of the biologial cycles of toxic elements enables us to predict the behavior of other toxic elements in the environment.