硫酸盐还原菌还原Cr(Ⅵ)的初步研究  

Study on Reduction of Hexavalent Chromium by Sulfate-reducing Bacteria

作　　者：瞿建国[1] 申如香[2] 徐伯兴[3] 李福德[4] 

机构地区：[1]华东师范大学河口海岸国家重点实验室,上海200062 [2]中国科学院硅酸盐研究所,上海200050 [3]华东师范大学环境科学系,上海200062 [4]中国科学院成都生物研究所,成都610041

出　　处：《华东师范大学学报（自然科学版）》2005年第1期105-110,共6页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金(50130030)上海宝钢集团公司联合资助

摘　　要：从土壤中分离筛选出几株抗Cr(Ⅵ)的硫酸盐还原菌(SRB),能在含800 mg/L Cr(Ⅵ)的培养基中生长,其中2-S-8菌株在含75 mg/L Cr(Ⅵ)的培养基中生长36 h后,培养液中的Cr (Ⅵ)已全部消失.该菌株经初步鉴定为脱硫弧菌.试验结果表明:高毒的Cr(Ⅵ)可被SRB还原成为低毒的Cr(Ⅲ),SRB对Cr(Ⅵ)的还原与SO42-还原作用密切相关,主要是由SRB的代谢作用所产生的还原性产物(S2-)来完成.Several Sulfate E Reducing Bacteria (SRB) strains, isolated from soil, were able to grow in the medium containing 800 mg/L chromium(Ⅵ), The Cr(Ⅵ) disappeared when the strain 2-S-8 grew in the medium containing 75 mg/L Cr(Ⅵ) for 36 h. The strain was identified as Desulfovibrio sp. The results showed that high-toxic Cr(Ⅵ) was reduced to hypo-toxic Cr(Ⅲ) by SRB, and the Cr(Ⅵ) reduction was related to the reduction of sulfate, which was mainly carried out effect by metabolin of SRB.

关 键 词：硫酸盐还原菌 铬(Ⅵ)还原 脱硫弧菌 生物修复 

分 类 号：Q939.9[生物学—微生物学]