ISSN:
0268-2605
Keywords:
Chlorella sp.
;
biomethylation
;
arsenic
;
HPLC-ICP-MS
;
cadmium
;
Chemistry
;
Industrial Chemistry and Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The growth of Chlorella Böhm, Chlorella kessleri and Chlorella 108 in media containing sodium arsenate at 200 or 2000 mg As dm-3 was investigated. The cell densities in the stationary phases were 40% higher for Chlorella Böhm (5.6×105 cells cm-3) and Chlorella kessleri (4.5×105 cells cm-3) grown in the 2000 mg As dm-3 arsenate media compared with the arsenic-free media. The growth of Chlorella 108 was depressed by arsenate. Dimethylarsinic acid (at concentrations never exceeding 1.2 mg As dm-3) and arsenite (≲0.2 mg As dm-3) were detected in the growth medium. The cells harvested during the stationary phase had 2400 mg arsenic associated with 1 kg dry mass. A water/methanol (80:20) mixture extracted all the arsenic from the cells. Most of the arsenic (99%) was arsenate. Arsenite, methylarsonic acid and dimethylarsinic acid accounted for the remaining arsenic. Cadmium in the arsenic-containing growth media (50 μg to 100 mg dm-3) reduced the yield of algal cells and induced the formation of an unidentified arsenic compound in Chlorella Böhm. © 1997 by John Wiley & Sons, Ltd.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
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