Arsenic remediation by formation of arsenic sulfide minerals in a continuous anaerobic bioreactor

Biotechnology and Bioengineering
Lucia Rodriguez-FreireJames A Field

Abstract

Arsenic (As) is a highly toxic metalloid that has been identified at high concentrations in groundwater in certain locations around the world. Concurrent microbial reduction of arsenate (As(V) ) and sulfate (SO4 (2-) ) can result in the formation of poorly soluble arsenic sulfide minerals (ASM). The objective of this research was to study As biomineralization in a minimal iron environment for the bioremediation of As-contaminated groundwater using simultaneous As(V) and SO4 (2-) reduction. A continuous-flow anaerobic bioreactor was maintained at slightly acidic pH (6.25-6.50) and fed with As(V) and SO4 (2-) , utilizing ethanol as an electron donor for over 250 d. A second bioreactor running under the same conditions but lacking SO4 (2-) was operated as a control to study the fate of As (without S). The reactor fed with SO4 (2-) removed an average 91.2% of the total soluble As at volumetric rates up to 2.9 mg As/(L · h), while less than 5% removal was observed in the control bioreactor. Soluble S removal occurred with an S to As molar ratio of 1.2, suggesting the formation of a mixture of orpiment- (As2 S3 ) and realgar-like (AsS) solid phases. Solid phase characterization using K-edge X-ray absorption spectroscopy confirmed the...Continue Reading

References

Oct 27, 1994·Nature·D AhmannF M Morel
Nov 5, 1997·Archives of Microbiology·D K NewmanF M Morel
Jan 27, 2000·Archives of Microbiology·J M MacyL I Sly
Sep 10, 2004·Proceedings of the National Academy of Sciences of the United States of America·Peggy A O'DayNelson Rivera
May 1, 1997·Applied and Environmental Microbiology·D K NewmanF Morel
Jul 17, 2007·Applied and Environmental Microbiology·Rhesa N LedbetterTimothy S Magnuson
Dec 14, 2007·Proceedings of the National Academy of Sciences of the United States of America·Ji-Hoon LeeHor-Gil Hur
May 23, 2012·Water Research·Fabienne Battaglia-BrunetCatherine Joulian
Sep 18, 2012·Biochimica Et Biophysica Acta·Robert van LisBarbara Schoepp-Cothenet
Sep 19, 2012·Revue neurologique·M Gräf, B Lorenz
Oct 10, 2013·Environmental Science & Technology·Robert A RootJon Chorover
Dec 24, 2013·Journal of Hazardous Materials·Muslum AltunKostas Komnitsas
Sep 10, 2014·Geochimica Et Cosmochimica Acta·Sarah M HayesJon Chorover
Sep 16, 2014·Water Research·Lucia Rodriguez-FreireJames A Field

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Citations

Apr 16, 2018·Ground Water·Charles J ParadisTerry C Hazen
Oct 29, 2018·Microbial Biotechnology·Prithiviraj ChellamuthuJames Q Boedicker
Nov 28, 2019·Environmental Microbiology Reports·Timothy R McDermottRonald S Oremland
Jul 20, 2018·Journal of Environmental Quality·Madhubhashini B GalkaduwaStacy L Hutchinson
Jan 30, 2016·Water, Air, and Soil Pollution·Lucia Rodriguez-FreireJames A Field
May 8, 2019·Environmental Science and Pollution Research International·Lukáš FalteisekPetr Drahota
Jun 15, 2021·Applied Microbiology and Biotechnology·Nohemi Campos-QuevedoIrene Sánchez-Andrea
Sep 28, 2021·Environmental Science & Technology·Ahmed G MeselhyOm Parkash Dhankher
Dec 2, 2021·The Science of the Total Environment·Magdaléna PeřestáMartin Mihaljevič

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