REMOBILIZATION OF HEAVY-METALS RETAINED AS OXYHYDROXIDES OR SILICATESBY BACILLUS-SUBTILIS CELLS

Authors
URRUTIA MM BEVERIDGE TJ
Citation
Mm. Urrutia et Tj. Beveridge, REMOBILIZATION OF HEAVY-METALS RETAINED AS OXYHYDROXIDES OR SILICATESBY BACILLUS-SUBTILIS CELLS, Applied and environmental microbiology, 59(12), 1993, pp. 4323-4329
Citations number
38
Categorie Soggetti
Microbiology,"Biothechnology & Applied Migrobiology
Journal title
Applied and environmental microbiology → ACNP
ISSN journal
00992240
Volume
59
Issue
12
Year of publication
1993
Pages
4323 - 4329
Database
ISI
SICI code
0099-2240(1993)59:12<4323:ROHRAO>2.0.ZU;2-Y
Abstract
The stability of heavy metals bound as either silicates or oxyhydroxid es by the surfaces of Bacillus subtilis with changes in pH and presenc e of competing cations and EDTA was studied. Wall-bound silicate was v ery stable. Of all conditions, a pH of 3.0 (by HNO3) promoted the grea test release of Cd (87% [wt/wt]), Pb (77%), or Cu (54%). Bacterial Pb resisted extraction by EDTA, and Cd that was included in bacterial-sil icates proved difficult to remobilize.