硫酸盐还原菌治理地浸采铀地下水的柱实验研究

Column experimental study on restoration of polluted groundwater from in situ leaching uranium mining with Sulfate Reducing Bacteria

以新疆某地浸采铀矿山为实例,通过柱实验研究了硫酸盐还原菌去除地浸采铀污染地下水中铀和硫酸盐等污染物的潜力.实验结果表明,硫酸盐还原菌可有效去除地浸采铀矿山地下水中的污染物U(Ⅵ)和SO42-,U(VI)的去除率可达94.5%,硫酸根去除率为75.3%,地下水的pH值可达到近中性.U(VI)和硫酸根都是作为硫酸盐还原菌的电子受体而通过生物还原去除的.研究结果为地浸废水的原位修复提供了新的生物技术思路.

The restoration of restoration of poilu bioremediation technology of mine wastewater has been ted groundwater from in situ leaching uranium mining and the regarded highly by environmental researchers. As an example for some in situ leaching uranium mine in Xinjiang, China, the potential of removal of contamination such as U and SO4^2- groundwater by Sulfate Reducing Bacteria （SRB） was studied through column experiments. The results indicate that SRB can remove efficiently contamination U（Ⅵ） and SO4^2- in groundwater from in situ leaching uranium mining, in which the removal efficiency of 94.5% and 75.3% for U（Ⅵ） and SO4^2- respectively was achieved. The pH of groundwater can reach near neutral. U（Ⅵ） and SO4^2- is removed by bioreduction and bioprecipitation in which U（VI） and SO4^2- are all as electron acceptor of sulfate reducing bacteria. The present results provide a new technological idea for bioremediation of wastewater from in situ leaching uranium mining..