Arsenic removal from contaminated soil via biovolatilization by genetically engineered bacteria under laboratory conditions

文献类型: 外文期刊

第一作者: Liu, Shuang

作者: Liu, Shuang;Chen, Jian;Sun, Guoxin;Zhang, Fan

作者机构:

关键词: Genetic engineering bacteria;Volatile arsenic;Biovolatilization;Bioremediation

期刊名称:JOURNAL OF ENVIRONMENTAL SCIENCES ( 影响因子:5.565; 五年影响因子:5.066 )

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收录情况: SCI

摘要: In Rhodopseudomonas palustris, an arsM gene, encoding bacterial and archaeal homologues of the mammalian Cytl9 As(III) S-adenosylmethionine methytransferase, was regulated by arsenicals. An expression of arsM was introduced into strains for the methylation of arsenic. When arsM was expressed in Sphingomonas desiccabilis and Bacillus idriensis, it had 10 folds increase of methyled arsenic gas compared to wild type in aqueous system. In soil system, about 2.2%-4.5% of arsenic was removed by biovolatilization during 30 days. This study demonstrated that arsenic could be removed through volatilization from the contaminated soil by bacteria which have arsM gene expressed. These results showed that it is possible to use microorganisms expressing arsM as an inexpensive, efficient strategy for arsenic bioremediation from contaminated water and soil.

分类号: X21

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