期刊论文

Tie, Bo-Qing(tiebq@qq.com)

中文

环境科学

0250-3301

2023

44

1

436-443

10.13227/j.hjkx.202202152

湖南省高新技术产业科技创新引领计划项目（科技攻关类）（2020NK2001）； 国家重点研发计划项目（2017YFD0801505）；

本校为第一机构

从镉、砷复合污染农田土壤中筛选出1株具有硫酸盐还原功能的肠杆菌,通过去除率实验结合表征实验来探究其对镉、砷钝化机制.结果表明,经鉴定筛选出来的菌株M5为肠杆菌属(Enterobacter sp.),具有硫酸盐还原功能,对镉、砷最大耐受浓度为1.0mmol·L~(-1)左右.在模拟体系中,菌株M5对镉去除率最大达94.13%,对砷去除率最大为27.26%.SEM-EDs和XRD的结果证实了CD和As被固定成Cds和As2S3,XPS结果表明该菌表面的羧基、羟基和酰胺基主要参与生物吸附.结果为微生物应用修复重金属及类金属污染土壤提供思路和理论依据.

A strain of Enterobacter was screened from cadmium and arsenic contaminated farmland soil and its passivation mechanism of cadmium and arsenic were explored through removing performance and characterization experiments. The results showed that the screened strain M5 was identified as Enterobacter sp. with a sulfate-reduction function, and its maximum resistance concentration was approximately 1 mmol·L - 1 to cadmium and arsenic. In the simulation system, the maximum removal efficiencies of cadmium and arsenic were 94. 13% and 27. 26% by strain...