Study on Characteristics of Bacterial Community in Copper Tailings at Different Tailing Layers of Shuimuchong Tailing-pond in Tongling City of Anhui Province
To investigate the traits and the driving factors of bacterial community in copper tailing-pond's different tailing layers during the process of oxidation/acidification,three-depth layers of tailing-pile at the Shuimuchong tailing-pond in Tongling City of Anhui Province were studied with their physico-chemical properties,content of heavy metals,and bacterial diversity being analyzed.As a result,the study showed that pH value gradually increased with the depth,nitrogen and phospho-rus were concentrated in the surface and bottom layers respectively,the contents of Cu and Pb decreased with increasing depth,while the contents of Zn and Mn increased,and the fact of low heavy-metal content and high organic matter content made it possible to enhance mid-layer bacterial diversity,Proteobacteria,Firmicutes and Chloroflexi having heavy-metal resistance ability being dominant in the tailing piles.Being an important part of the nutrient cycle,bacteria such as Pseudomonas,Acineto-bacter,and Anoxybacillus became the dominant genus,and the distribution of various taxas of bacteria in the surface tailing-pile was in balance,while the rare taxa was enriched in the middle layer,and the rare and middle taxas were enriched in the bottom.In addition,pH value was driving rare taxa to change,while Mn and TP were leading the common taxa's shift.
acidified oxidation tailingsdeep-layer tailings profiletailing stratificationabundant and rare taxaheavy metal
万方数据
维普
