Affiliation:
1. Department of Microbiology, College of Biological Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1
Abstract
The stability of heavy metals bound as either silicates or oxyhydroxides by the surfaces of
Bacillus subtilis
with changes in pH and presence of competing cations and EDTA was studied. Wall-bound silicate was very stable. Of all conditions, a pH of 3.0 (by HNO
3
) promoted the greatest release of Cd (87% [wt/wt]), Pb (77%), or Cu (54%). Bacterial Pb resisted extraction by EDTA, and Cd that was included in bacterial-silicates proved difficult to remobilize.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
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