A new Klebsiella planticola strain (Cd-1) grows anaerobically at high cadmium concentrations and precipitates cadmium sulfide.

Abstract:

:Heavy metal resistance by bacteria is a topic of much importance to the bioremediation of contaminated soils and sediments. We report here the isolation of a highly cadmium-resistant Klebsiella planticola strain, Cd-1, from reducing salt marsh sediments. The strain grows in up to 15 mM CdCl(2) under a wide range of NaCl concentrations and at acidic or neutral pH. In growth medium amended with thiosulfate, it precipitated significant amounts of cadmium sulfide (CdS), as confirmed by x-absorption spectroscopy. In comparison with various other strains tested, Cd-1 is superior for precipitating CdS in cultures containing thiosulfate. Thus, our results suggest that Cd-1 is a good candidate for the accelerated bioremediation of systems contaminated by high levels of cadmium.

journal_name

Appl Environ Microbiol

authors

Sharma PK,Balkwill DL,Frenkel A,Vairavamurthy MA

doi

10.1128/aem.66.7.3083-3087.2000

keywords:

subject

Has Abstract

pub_date

2000-07-01 00:00:00

pages

3083-7

issue

7

eissn

0099-2240

issn

1098-5336

journal_volume

66

pub_type

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