稀土尾矿库区周边地下水中微生物、硫酸盐耦合作用下的稀土分配规律研究

地下水作为可以直接引用的水源，其中稀土元素的生态安全问题不容忽视。深入理解稀土的分布规律对其生态风险评价具有重要意义。本项目以稀土尾矿库区周边地下水为研究对象，结合实验室模拟和现场监测，分别测定颗粒物、溶液中的稀土离子浓度、硫酸盐浓度和微生物的数量的时间/空间浓度变化，确定稀土的分布特征；采用多元的统计分析方法揭示稀土尾矿库区周边地下水中稀土的分配与微生物、硫酸盐、DOC和细菌群落结构等多环境因子的耦合作用机理。利用FTIR、荧光发射光谱或者EXAFS技术表征稀土-有机胶体物质的络合态结构并对其潜在的健康风险进行评估。为理解稀土在环境中的分布模式及其的环境标准的制定提供有价值的参考。

The rare earth in groundwater ecological security problems cannot be ignored, due to it can be directly drinkable water. The understanding the distribution of rare earth can provide a theoretical guidance about how to efficiently assessment health risk about rare earth in groundwater. According to laboratory simulation and the scene monitoring, analyze rare earth, sulfate, microorganisms concentration in the particulate matter and solution from rare earth tailing area surrounding groundwater at time/space variation. Using multivariate statistical analysis method to reveal the distribution of the rare earths and environmental factors including microbial, sulfate, DOC and bacterial community structure coupling mechanism. Using FTIR and fluorescence emission spectrum or the EXAFS technology characterization of rare earth - organic complexing state structure of the colloidal substances and to evaluate its potential health risks.To understand the distribution patterns of rare earth in the environment and provide valuable reference for the establishment of environmental standards.