不同类型微生物钝化固定镉污染的研究进展
Research Progress of Different Types of Microorganisms Passivation and Fixation of Cadmium Contamination
陈瑞红 1秦永丽 1赖凤 1蒋永荣1
作者信息
- 1. 桂林电子科技大学生命与环境科学学院,广西 桂林 541004
- 折叠
摘要
这是一篇矿山生态修复领域的论文.近年来,微生物钝化固定逐渐成为重金属污染治理领域的研究热点.结合典型菌株与重金属镉的钝化固定规律对微生物钝化固定镉的机制进行归纳:(1)微生物细胞壁及胞外聚合物(EPS)具有丰富的基团,如羧基、羟基等,能够有效吸附Cd2+,并提供成核位点,钝化为晶体矿物;(2)环境中的硫酸盐还原菌、溶磷菌、产脲酶菌可通过自身代谢,生成金属沉淀,通过微环境变化,形成晶体矿物;铁锰氧化菌是通过自身代谢产物间接吸附重金属离子.研究微生物钝化固定镉的反应机制及含镉晶体矿物形成微观环境条件,对修复镉污染有重要意义.
Abstract
This is an article in the field of ecological restoration of mines.In recent years,the microbial passivation and fixation has gradually become a hotspot in the field of heavy metal contamination control.Here is a review to summarize the mechanism of microbial passivation and fixation of cadmium based on the passivation and immobilization of typical strains and heavy metal cadmium:(1)Microbial cell walls and extracellular polymers(EPS)have abundant groups,such as carboxyl,hydroxyl,etc.,which can effectively adsorb Cd2+,and passivated into crystalline minerals.(2)Sulfate-reducingbacteria,phosphate-dissolving bacteria,urease-producing bacteria in the environment can generate metal precipitates through their own metabolism,and then form crystal minerals through changes in the microenvironment.Fe/Mn oxidizing microorganisms indirectly adsorb heavy metal ions through their own metabolites.To study the reaction mechanism of microbial passivation and immobilization of cadmium and the formation of microenvironment conditions of cadmium-containing crystal minerals,which is of great significance for the remediation of cadmium pollution.
关键词
矿山生态修复/微生物/镉污染/钝化固定/机理Key words
Ecological restoration of mines/Microorganism/Cadmium pollution/Passivation fixation/Mechanism引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据