摘要
砷污染作为全球性环境问题已经引起了人们的高度重视。无机砷化合物可与铁氢氧化物络合通过共沉淀作用去除。因此,利用具有砷耐性的铁氧化菌氧化环境中的铁元素去除砷化合物具有潜在的应用前景。目前已有利用铁氧化菌去除环境中砷污染物的报道。用于砷污染修复的铁氧化菌必须有一定的砷耐性才能在含砷环境中行使功能。微生物是否具有砷耐性往往取决于基因,并且不同的菌株具有不同的生理特征,适宜不同砷污染环境的修复。本文通过对8株代表性的铁氧化菌砷耐性基因的总结,阐述其耐砷机制、研究概况及应用前景,以期为铁氧化菌用于除砷新技术的开发提供参考。
As a global environmental issue, arsenic pollution has attracted great attentions. Inorganic arsenic compounds can be removed from soil and aqueous system through the co-precipitation by complexing with iron hydroxide. Therefore, Fe(Ⅱ)-oxidizing bacteria have been expected to depollute the arsenic compounds from environment coupling with the microbial iron oxidation. To date, an increasing number of studies have reported that Fe(Ⅱ)-oxidizing bacteria were used in the bioremediation of environmental arsenic pollution. The Fe(Ⅱ)-oxidizing bacteria used for the arsenic removal must have an arsenic tolerance in order to function in the arsenic-containing environment. Whether the microorganisms have arsenic tolerance always depends on its genetic basis. Besides, different bacterial strains have different physiological characteristics and are suitable for remediation of different arsenic-contaminated environments. By summarizing the arsenic tolerance genes of eight representative Fe(Ⅱ)-oxidizing bacteria, this paper represents their arsenic tolerance mechanism, research overview and application prospect, in an attempt to provide a reference for the technological innovation of applying Fe(Ⅱ)-oxidizing bacteria to arsenic removal.
作者
陈淋霞
张萌
石佳佳
张笛
郭永
包智华
CHEN Lin-Xia;ZHANG Meng;SHI Jia-Jia;ZHANG Di;GUO Yong;BAO Zhi-Hua(Laboratory of Microbial Ecology and Resources,School of Ecology and Environment,Inner Mongolia University,Hohhot,Inner Mongolia 010021,China;Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Reuse,Hohhot,Inner Mongolia 010021,China;Laboratory of Microbial Ecology,College of Agriculture,Ibaraki University,Ibaraki 300-0393,Japan)
出处
《微生物学通报》
CAS
CSCD
北大核心
2020年第9期3054-3064,共11页
Microbiology China
基金
内蒙古“一湖两海”科技重大专项(ZDZX2018054)
国家自然科学基金(41963008,41563009)
内蒙古科技计划(JH20180633)。
关键词
铁氧化菌
砷污染
砷耐性基因
共沉淀
细胞质砷还原
ars基因
Fe(Ⅱ)-oxidizing bacteria
Arsenic pollution
Arsenic tolerance gene
Co-precipitation
Cytoplasmic arsenic reduction
ars gene
