【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.更多还原

【Abstract】 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.更多还原