关键词: 矿区土壤修复, 丁基黄药, 镉, 降解矿化, 土壤微生物活性

Abstract: Typical flotation chemicals butyl xanthate and heavy metal Cd in metal mining areas have the characteristics of easy accumulation and high migration,which lead to serious compound pollution of the soil around the mining area,but there is still a lack of efficient and green remediation technology for them.The effectiveness and soil microbial characteristics of the bifunctional flora SDMC in remediating the compound contamination soil with butyl xanthate and Cd were studied,and the results showed that the degradation rate of butyl xanthate and Cd mineralization rate could reach 63.34% and 71.83%,respectively,with good remediation effect.The soil microbial abundance,peroxidase,urease,sucrase activity,and AWCD increased by 9,1.22,5.92,1.15 and 1.18 times,respectively,compared with the non-remediated soil,indicating significant facilitation for soil microbial abundance,enzymatic and metabolic activity.The relative abundance of Sporosarcina,Hyphomicrobium and Pseudomonas,which play a role in degrading mineralized composite pollutants,increased by 43.75 percentage points,21.32 percentage points and 4.25 percentage points,respectively,indicating that SDMC has become the dominant bacteria for remediation,and this study provides a new method for remediation of butyl xanthate and Cd compound pollution soil in metal mining areas.

Key words: soil remediation in mining area, butyl xanthate, Cd, degradation and mineralization, soil microbial activity