Arsenic in freshwater systems: Influence of eutrophication on occurrence, distribution, speciation, and bioaccumulation

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dc.contributor.author Rahman, Mohammad en_US
dc.contributor.author Hasegawa, Hiroshi en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-10-12T03:33:29Z
dc.date.available 2012-10-12T03:33:29Z
dc.date.issued 2012 en_US
dc.identifier 2011000046 en_US
dc.identifier.citation Rahman Mohammad and Hasegawa Hiroshi 2012, 'Arsenic in freshwater systems: Influence of eutrophication on occurrence, distribution, speciation, and bioaccumulation', Pergamon, vol. 27, no. 1, pp. 304-314. en_US
dc.identifier.issn 0883-2927 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/18167
dc.description.abstract Arsenic exists in a variety of chemical forms, and microbial metabolism results in the occurrence of thermodynamically unstable arsenite (As-III) and methylarsenic compounds in freshwaters (rivers and lakes). The inorganic forms (As-V and AsIII) and the methylated forms (methylarsonic acid; MMAA(V) and dimethylarsinic acid; DMAA(V)) are the main species of As in freshwaters while the bulk of the total dissolved As is inorganic species. Although the predominant forms of methylarsenic compounds are consistently DMAA(V) followed by MMAA(V), the DMAA(III) and MMAA(III) species have also been found in freshwaters. Several observations have revealed that phytoplankton activities are responsible for the seasonal variations of methylarsenic compounds in freshwaters. Although it was unclear if the occurrences of methylarsenic compounds were from the breakdown of larger molecules or the end-products of phytoplankton biosynthesis, recent studies have revealed that less toxic As-glutathione complexes are intermediates in the biosynthesis of organoarsenic compounds by phytoplankton. Recent studies have also revealed that eutrophication plays an important role in the production, distribution, and cycling of methylarsenic compounds in freshwaters. In this review, the recent reports on the influence of eutrophication on distribution, speciation, and bioaccumulation in freshwaters are discussed. en_US
dc.language en_US
dc.publisher Pergamon en_US
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.apgeochem.2011.09.020 en_US
dc.rights NOTICE: this is the author’s version of a work that was accepted for publication in Applied Geochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Geochemistry, [VOL 27, ISSUE 1, (January 2012)] DOI http://dx.doi.org/10.1016/j.apgeochem.2011.09.020 en_US
dc.title Arsenic in freshwater systems: Influence of eutrophication on occurrence, distribution, speciation, and bioaccumulation en_US
dc.parent Applied Geochemistry en_US
dc.journal.volume 27 en_US
dc.journal.number 1 en_US
dc.publocation Oxford, UK en_US
dc.identifier.startpage 304 en_US
dc.identifier.endpage 314 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 050200 en_US
dc.personcode 112851 en_US
dc.personcode 0000070288 en_US
dc.percentage 100 en_US
dc.classification.name Environmental Science and Management en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords ATOMIC-ABSORPTION-SPECTROMETRY; PERFORMANCE LIQUID-CHROMATOGRAPHY; PLASMA-MASS SPECTROMETRY; ABANDONED GOLD MINE; NATURAL-WATERS; FOOD-CHAIN; MARINE ORGANISMS; SEASONAL-CHANGES; TRACE-ELEMENTS; LAKE-BIWA en_US


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