Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Monothioarsenate Occurrence in Bangladesh Groundwater and its Removal by Ferrous and Zero-Valent Iron Technologies

Title data

Planer-Friedrich, Britta ; Schaller, Jörg ; Wismeth, Fabian ; Mehlhorn, Judith ; Hug, Stephan:
Monothioarsenate Occurrence in Bangladesh Groundwater and its Removal by Ferrous and Zero-Valent Iron Technologies.
In: Environmental Science & Technology. Vol. 52 (2018) Issue 10 . - pp. 5931-5939.
ISSN 0013-936X
DOI: https://doi.org/10.1021/acs.est.8b00948

Abstract in another language

In most natural groundwaters, sulfide concentrations are low and little attention has been paid to potential occurrence of thioarsenates (AsVSn-IIO4-n3- with n=1-4). Thioarsenate occurrence in groundwater could be critical with regard to the efficiency of iron (Fe)-based treatment technologies because previous studies reported less sorption of thioarsenates to preformed Fe-minerals compared to arsenite and arsenate. We analyzed 273 groundwater samples taken from different wells in Bangladesh over a year and detected monothioarsenate (MTA), likely formed via solid-phase zero-valent sulfur, in almost 50% of all samples. Concentrations ranged up to >30 µg L-1 (21% of total As). MTA removal by locally used technologies in which zero-valent or ferrous Fe is oxidized by aeration and As sorbs or co-precipitates with the forming Fe(III)hydroxides was indeed lower than for arsenate. The presence of phosphate required up to three times as much Fe(II) for comparable MTA removal. However, in contrast to previous sorption studies on preformed Fe minerals, MTA removal, even in the presence of phosphate, was still higher than that of arsenite. The more efficient MTA removal is likely caused by a combination of co-precipitation and adsorption rendering the tested Fe-based treatment technologies suitable for As removal also in the presence of MTA.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER145817
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Environmental Geochemistry Group
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Environmental Geochemistry Group > Professorship Environmental Geochemistry - Univ.-Prof. Dr. Britta Planer-Friedrich
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 04 Apr 2019 10:17
Last Modified: 04 Apr 2019 10:17
URI: https://eref.uni-bayreuth.de/id/eprint/48239