Microbial treatment of heavy metals is a low-cost and environmentally friendly method. During the treatment of chromium pollution, environmental media has a great impact on the efficiency of bacteria Cr immobilization. However, when Cr(VI) coexist with different metal cations, the reduction of Cr(VI) and the immobilization of Cr by bacteria are still unclear. In our research, although bacteria were significantly promoted the reduction of Cr(VI) with the coexistence of Mn(II), the bacteria produced the maximum of soluble organic Cr(III). In the performance of immobilization Cr, Mg(II) group has the highest chromium immobilizing rate. In addition, Cd(II) has the strongest inhibitory effect on Cr(VI) reduction and Cr immobilization. The SEM results show that Cr were stored in the cells. However, XRD analysis did not demonstrate the crystal structure. Our research investigated the ability of bacteria to reduce and immobilize Cr with the coexistence of 9 different metal ions, and provided a reference for a deeper understanding of the relationship between bacteria and metal ions.

微生物处理重金属是一种低成本且环境友好的方法。在处理铬污染的过程中，环境介质对细菌Cr固定化的效率有很大影响。但是，当Cr（VI）与不同的金属阳离子共存时，Cr（VI）的还原和细菌对Cr的固定作用仍不清楚。在我们的研究中，尽管细菌与Mn（II）共存显着促进了Cr（VI）的还原，但细菌产生的可溶性有机Cr（III）最多。在固定Cr的性能中，Mg（II）基团具有最高的铬固定率。另外，Cd（II）对Cr（VI）还原和Cr固定具有最强的抑制作用。SEM结果表明Cr被储存在电池中。但是，XRD分析未证明其晶体结构。