铅冶炼场地土壤微生物群落结构与硫氧化菌作用
Soil microbial community in lead smelting area and the role of sulfur-oxidizing bacteria
吴川 1陈虹任 2陆永平 3漆彦婷 2李海峰 4罗兴华 2陈玥如 2娄伟 5杨卫春 2李伟展4
作者信息
- 1. School of Metallurgy and Environment,Central South University,Changsha 410083,China;Department of Science and Environmental Studies,The Education University of Hong Kong,Hong Kong 999007,China
- 2. School of Metallurgy and Environment,Central South University,Changsha 410083,China
- 3. China Railway Seventh Bureau Group Nanjing Engineering Co.,Ltd.,Nanjing 210012,China
- 4. Department of Science and Environmental Studies,The Education University of Hong Kong,Hong Kong 999007,China
- 5. Hunan Hikee Environmental Technology Co.,Ltd.,Changsha 410001,China
- 折叠
摘要
长期的铅冶炼生产活动给周边地区带来了严重的重金属污染.重金属污染土壤的微生物群落结构和组成对其风险评估和污染修复具有重要意义.本文选择某铅冶炼区域的周边环境,研究重金属污染在垂直剖面上对土壤微生物群落结构和组成的影响.结果表明,重金属含量随着土壤垂直深度的增加而逐渐降低,中度污染土壤中微生物群落多样性高于低污染土;无论污染程度如何,表层土壤微生物群落多样性均高于底层;相对丰度优势属包括 Perlucidibaca、Limnobacter、Delftia、Hydrogenophaga、Thiobacillus、Sulfurifustis、Sphingopyxis,其中硫氧化菌(SOB)丰度较高.XRD结果表明,土壤中存在PbSO4,可能是由于SOB的富集对硫的氧化作用.这种硫循环特征可能是铅(Pb)转化为PbSO4的稳定化修复潜力.
Abstract
The long-term operation of the lead smelter has brought serious heavy metal pollution to the surrounding soil.The microbial community structure and composition of heavy metal contaminated soil is important for the risk assessment and pollution remediation.In this study,a lead smelter operating for more than 60 years was used to investigate the effects of heavy metal pollution on soil microbial community structure and composition in vertical profile.The results showed that the heavy metal content decreases gradually with increasing vertical depth of the soil.The diversity of soil microbial community with moderate pollution was higher than that with low pollution.Regardless of the pollution level,the diversity of soil microbial community was higher in the surface layer than in the bottom layer.The dominant relative abundance genera include Perlucidibaca,Limnobacter,Delftia,Hydrogenophaga,Thiobacillus,Sulfurifustis and Sphingopyxis,showing a higher abundance of sulfur-oxidizing bacteria(SOB).XRD results showed the presence of PbSO4 in soil,may be due to the enrichment of SOB for the oxidation of sulfur.This sulfur cycle characteristic may be potential for the stabilization and remediation of lead(Pb)into PbSO4.
关键词
有色冶炼/重金属/土壤污染/硫氧化菌/微生物群落Key words
non-metal smelting/heavy metals/soil contamination/sulfur-oxidizing bacteria/microbial community引用本文复制引用
基金项目
国家自然科学基金(42177392)
Research and Development Office of the Education University of Hong Kong,China(ref:RG 45/2022-2023R)
出版年
2024
NETL
NSTL
万方数据