The dynamic development of bacterial community following long-term weathering of bauxite residue  

作　　者：Hao Wu Li Chen Feng Zhu William Hartley Yifan Zhang Shengguo Xue 

机构地区：[1]School of Metallurgy and Environment,Central South University,Changsha 410083,China [2]Crop and Environment Sciences Department,Harper Adams University,Newport,Shropshire TF108 NB,UK

出　　处：《Journal of Environmental Sciences》2020年第4期321-330,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.41371475);the InnovativeProject of Independent Exploration of Central South University(No.1053320171026)

摘　　要：Bauxite residue is the industrial waste generated from alumina production and commonly deposited in impoundments.These sites are bare of vegetation due to the extreme high salinity and alkalinity,as well as lack of nutrients.However,long term weathering processes could improve residue properties to support the plant establishment.Here we investigate the development of bacterial communities and the geochemical drivers in bauxite residue,using Illumina high-throughput sequencing technology.Long term weathering reduced the pH in bauxite residue and increased its nutrients content.The bacterial community also significantly developed during long term weathering processes.Taxonomic analysis revealed that natural weathering processes encouraged the populations of Proteobacteria,Chloroflexi,Acidobacteria and Planctomycetes,whereas reducing the populations of Firmicutes and Actinobacteria.Redundancy analysis(RDA)indicated that total organic carbon(TOC)was the dominant factors affecting microbial structure.The results have demonstrated that natural weathering processes improved the soil development on the abandoned bauxite residue disposal areas,which also increased our understanding of the correlation between microbial variation and residue properties during natural weathering processes in Bauxite residue disposal areas.

关 键 词：Bauxite residue disposal areas Bacterial community Natural weathering processes Driving factors Soil formation 

分 类 号：X758[环境科学与工程—环境工程] X172