Monothioarsenate Transformation Kinetics Determining Arsenic Sequestration by Sulfhydryl Groups of Peat

Environmental Science & Technology
Johannes BesoldBritta Planer-Friedrich

Abstract

In peatlands, arsenite was reported to be effectively sequestered by sulfhydryl groups of natural organic matter. To which extent porewater arsenite can react with reduced sulfur to form thioarsenates and how this affects arsenic sequestration in peatlands is unknown. Here, we show that, in the naturally arsenic-enriched peatland Gola di Lago, Switzerland, up to 93% of all arsenic species in surface and porewaters were thioarsenates. The dominant species, monothioarsenate, likely formed from arsenite and zerovalent sulfur-containing species. Laboratory incubations with sulfide-reacted, purified model peat showed increasing total arsenic sorption with decreasing pH from 8.5 to 4.5 for both, monothioarsenate and arsenite. However, X-ray absorption spectroscopy revealed no binding of monothioarsenate via sulfhydryl groups. The sorption observed at pH 4.5 was acid-catalyzed dissociation of monothioarsenate, forming arsenite. The lower the pH and the more sulfhydryl sites, the more arsenite sorbed which in turn shifted equilibrium toward further dissociation of monothioarsenate. At pH 8.5, monothioarsenate was stable over 41 days. In conclusion, arsenic can be effectively sequestered by sulfhydryl groups in anoxic, slightly acidic e...Continue Reading

References

Sep 22, 2005·Environmental Science & Technology·S StauderF Sacher
Sep 27, 2006·Environmental Science & Technology·Kaylene RitterDonald L Macalady
Oct 21, 2006·Environmental Science & Technology·Johanna BuschmannLaura Sigg
Apr 18, 2007·Analytical Chemistry·Dirk Wallschläger, Christopher J Stadey
Sep 8, 2007·Environmental Science & Technology·Britta Planer-FriedrichDirk Wallschläger
Jan 1, 2008·Environment International·Suiling Wang, Catherine N Mulligan
Aug 14, 2009·Environmental Science & Technology·Britta Planer-Friedrich, Dirk Wallschläger
Sep 22, 2009·Analytical Chemistry·Elke SuessBritta Planer-Friedrich
Dec 17, 2009·Environmental Science & Technology·Thomas BorchKate Campbell
May 4, 2010·Environmental Science & Technology·Prasesh SharmaAndreas Kappler
Oct 28, 2010·Environmental Science & Technology·James J RothwellTimothy E H Allott
Dec 1, 2010·Analytical Chemistry·Britta Planer-FriedrichDirk Wallschläger
Feb 17, 2011·Environmental Science & Technology·Guangliang LiuYong Cai
Feb 18, 2011·Chemosphere·Elke SuessBritta Planer-Friedrich
May 10, 2011·Chemosphere·Katherine Lizama AGuangzhi Sun
Oct 12, 2011·Environmental Science & Technology·Christian Mikutta, Ruben Kretzschmar
Jul 10, 2012·Chemosphere·Elke Suess, Britta Planer-Friedrich
Oct 19, 2012·Environmental Science & Technology·Martin HoffmannRuben Kretzschmar
Feb 13, 2013·Environmental Toxicology and Chemistry·Valerie K StuckerJames F Ranville
Oct 4, 2013·Environmental Science & Technology·Martin HoffmannRuben Kretzschmar
Jan 15, 2014·Environmental Science & Technology·Peggy LangnerRuben Kretzschmar
Feb 26, 2014·Environmental Science & Technology·Martin HoffmannRuben Kretzschmar
Apr 17, 2014·Environmental Science & Technology·Moli WanStefan Peiffer
Oct 21, 2014·Environmental Science & Technology·Valerie K StuckerJames F Ranville
Sep 9, 2015·Journal of Colloid and Interface Science·Charlotte CatrouilletGérard Gruau
Mar 12, 2016·Environmental Science & Technology·Laurel K ThomasArrigoRuben Kretzschmar
Oct 5, 2017·Environmental Science & Technology·Linghao KongXingyun Hu

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Citations

Jan 28, 2020·Environmental Microbiology·Katharina KujalaBritta Planer-Friedrich
Nov 9, 2018·Frontiers in Microbiology·Ibtissem Ben FekihCarlos Cervantes
Dec 7, 2020·The Science of the Total Environment·Anne EberleBritta Planer-Friedrich
Apr 28, 2021·The Science of the Total Environment·Xudong WeiDaniel C W Tsang
Jan 27, 2019·The Science of the Total Environment·Uzair Akbar KhanAnna-Kaisa Ronkanen
Aug 23, 2019·Environmental Science & Technology·Johannes BesoldBritta Planer-Friedrich
Apr 30, 2020·Environmental Science & Technology·Anne EberleBritta Planer-Friedrich
Apr 12, 2019·Environmental Science & Technology·Johannes BesoldBritta Planer-Friedrich
Feb 19, 2020·Environmental Science & Technology·Naresh KumarKristin Boye
Mar 18, 2020·Environmental Science & Technology·Jiajia WangBritta Planer-Friedrich
Dec 2, 2021·The Science of the Total Environment·Magdaléna PeřestáMartin Mihaljevič

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