铀矿的不断开采产生了大量的废石、废渣，进而使得越来越多的放射性铀进入到土壤中，引起了非常严重的土壤放射性铀污染，给当地环境和居民带来了长期的放射性危害隐患，由此铀污染土壤修复已成为当今铀矿山环境治理的一个重要课题。本项目以江西721矿尾矿库、水冶厂及其周围污染土壤为研究对象，在系统研究铀污染土壤环境特征基础上，通过分离、选育和驯化培养，筛选出具有较强活性的铀耐受还原菌，进行生理生化特性和鉴定研究，获得最优铀耐受还原菌，开展铀污染土壤修复研究，提出铀污染土壤的微生物修复新技术，并探讨铀耐受还原菌修复铀污染土壤的机理。研究成果不仅可以为铀污染土壤修复的实际应用提供科学依据和基础参数，而且对江西省经济可持续发展战略和生态文明先行示范区建设也具有重要意义。

Continuous uranium mining generated a lot of waste rock and slag. So there is an increasing impregnation of radioactive uranium in the soil, which causes a very serious radioactive uranium contamination of soil and brings long-term radioactive hazard risks to the local environment and residents. Therefore, the recovery of soil contaminated by uranium has become an important issue in today's uranium mining environmental improvement. The project studies the tailing pond and hydro metallurgy sites of Mine 721,Jiangxi Province. It analyzes the environmental characteristics and microbial ecology toxicity of the soil contaminated by the uranium tailings systematically, getting the best uranium tolerance estoration strains by separating, screening and identification. This project conducts the research of indigenous microorganisms in situ remediation on soil contaminated by uranium and explores the restoration mechanism of indigenous microorganisms on soil contaminated by uranium. Research results can not only provide scientific basis and basic parameters for the practical application of the restoration of soil contaminated by uranium mines, but also have important significance on Construction of ecological civilization for antecedent demonstration area and sustainable development strategy in Jiangxi Province.