Evaluation of hexavalent chromium reduction by chromate-resistant moderately halophile, Nesterenkonia sp strain MF2

被引：51
作者：
Amoozegar, Mohammad Ali
Ghasemi, Ali
Razavi, Mohammad Reza
Naddaf, Saied
机构：
[1] Univ Tehran, Sch Biol, Dept Microbiol, Extremophiles Lab, Tehran, Iran
[2] Inst Pasteur, Dept Parasitol, Tehran, Iran
来源：
PROCESS BIOCHEMISTRY | 2007年 / 42卷 / 10期
基金：
美国国家科学基金会;
关键词：
bioremediation; chromate reduction; chromate removal; moderately halophiles; Nesterenkonia; toxic oxyanions;
D O I：
10.1016/j.procbio.2007.07.001
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
A Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of tanneries, and identified as Nesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 rum of chromate and completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO42-) into almost non-toxic and insoluble Cr(III) in 24 h under aerobic condition. The maximum chromate removal was exhibited in 1.5 M NaCl at 35 degrees C and pH 8.0. Initial Cr(VI) concentration until 0.4 MM did not have a significant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. The chromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase. (C) 2007 Elsevier Ltd. All rights reserved.
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收藏
页码：1475 / 1479
页数：5
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