Response of soil microbial activities and ammonia oxidation potential to environmental factors in a typical antimony mining area  

作　　者：Aihua Wang Shujun Liu Jun Xie Wei Ouyang Mengchang He Chunye Lin Xitao Liu 

机构地区：[1]State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University,Beijing 10875,China [2]Lengshuijiang Branch of Loudi Ecology and Environment Bureau,Lengshuijiang 417099,China [3]Advanced Interdisciplinary Institute of Environment and Ecology,Beijing Normal University,Zhuhai 519087,China

出　　处：《Journal of Environmental Sciences》2023年第5期767-779,共13页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.42030706).

摘　　要：Mining,smelting and tailing deposition activities can cause metal(loid)contamination in surrounding soils,threatening ecosystems and human health.Microbial indicators are sensitive to environmental factors and have a crucial role in soil ecological risk assessment.Xikuangshan,the largest active antimony(Sb)mine in the world,was taken as the research area.The soil properties,metal(loid)contents and microbial characteristics were investigated and their internal response relationships were explored by multivariate statistical analysis.The assessment of the single pollution index and Nemerow synthetic pollution index(PN)showed that the soils were mainly polluted by Sb,followed by Cd and As,in which sampling site S1 had a slight metal(loid)pollution and the other sampling sites suffered from severe synthetic metal(loid)pollution.The microbial characteristics were dissimilar among sampling points at different locations from the mining area according to hierarchical cluster analysis.The correlation analysis indicated that fluorescein diacetate hydrolase,acid phosphatase,soil basal respiration andmicrobial biomass carbonwere negatively correlatedwith PN,indicating their sensitivity to combined metal(loid)contamination;that dehydrogenase was positively correlated with pH;and that urease,potential ammonia oxidation and abundance of ammonia-oxidizing bacteria and archaea were correlated with N(nitrogen)contents.However,β-glucosidase activity had no significant correlations with physicochemical properties and metal(loid)contents.Principal components analysis suggested bioavailable Sb and pH were the dominant factors of soil environment in Xikuangshan Sb mining area.Our results can provide a theoretical basis for ecological risk assessment of contaminated soil.

关 键 词：Antimony mining area Metal(loid)pollution Microbial characteristics Enzyme activities Ammonia oxidation potential 

分 类 号：X53[环境科学与工程—环境工程] S154.3[农业科学—土壤学]