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Removal of sulfate and heavy metals by sulfate reducing bacteria in short-term bench scale upflow anaerobic packed bed reactor runs

Jong, Tony J. and Parry, David L. (2003). Removal of sulfate and heavy metals by sulfate reducing bacteria in short-term bench scale upflow anaerobic packed bed reactor runs. Water Research,37(14):3379-3389.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 148 times in Scopus Article | Citations

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Title Removal of sulfate and heavy metals by sulfate reducing bacteria in short-term bench scale upflow anaerobic packed bed reactor runs
Author Jong, Tony J.
Parry, David L.
Journal Name Water Research
Publication Date 2003
Volume Number 37
Issue Number 14
ISSN 0043-1354   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-0038049889
Start Page 3379
End Page 3389
Total Pages 11
Place of Publication United Kingdom
Publisher Pergamon
Field of Research 0799 - Other Agricultural and Veterinary Sciences
0907 - Environmental Engineering
HERDC Category C1 - Journal Article (DEST)
Abstract Mildly acidic metal (Cu, Zn, Ni, Fe, Al and Mg), arsenic and sulfate contaminated waters were treated, over a 14 day period at 25°C, in a bench-scale upflow anaerobic packed bed reactor filled with silica sand and employing a mixed population of sulfate-reducing bacteria (SRB). The activity of SRB increased the water pH from 4.5 to 7.0, and enhanced the removal of sulfate and metals in comparison to controls not inoculated with SRB. Addition of organic substrate and sulfate at loading rates of 7.43 and 3.71 kg d−1 m−3, respectively, resulted in >82% reduction in sulfate concentration. The reactor removed more than 97.5% of the initial concentrations of Cu, Zn and Ni, while only >77.5% and >82% of As and Fe were removed, respectively. In contrast, Mg and Al levels remained unchanged during the whole treatment process. The removal patterns for Cu, Zn, Ni and Fe reflected the trend in their solubility for their respective metal sulfides, while As removal appeared to coincide with decreasing Cu, Zn, Ni and Fe concentrations, which suggests adsorption or concomitant precipitation with the other metal sulfides.
DOI http://dx.doi.org/10.1016/S0043-1354(03)00165-9   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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