硝酸盐氮污染地下水原位修复的试验研究

在北京北天堂非正规垃圾填埋场进行硝酸盐氮污染地下水原位修复试验研究。通过抽水试验、示踪试验和碳源投加试验,分析了对污染地下水的原位修复能力及效果。试验结果表明,试验获得了指导后续地下水修复试验及数值模拟预测的水文地质参数,试验场区的潜水含水层渗透系数为195.3 m/d,导水系数为781.3 m2/d,给水度为0.167°。在碳源投加试验运行初期,地下水中的硝酸盐氮去除率就已达到45%以上,投加碳源后对地下水硝酸盐氮反硝化作用有很好的强化效果。试验分析方法和研究成果为类似试验研究积累了成功经验,可为地下水原位修复工程应用及推广提供借鉴与参考。

Experimental study on in-site remediation of groundwater polluted by nitrate nitrogen

This paper, based on the subject of the research and demonstration of the pollution prevention and remediation technologies in the typical contaminated areas, have the experimental study on in-site remediation of groundwater polluted by nitrate nitrogen at Beitiantang informal landfill in Beijing. This paper, used the pumping test, tracer test and carbon source feeding test, analysis the capacity and effect in-site on the pollution groundwater. The test results shows that the test gets the hydrogeological parameters of guiding subsequent groundwater remediation experiment and numerical simulation, unconfined aquifer permeability coefficient of the test area is 195.3m/d, the water conduction coefficient is 781.3m2/d, water supply is 0.167; in the early of carbon source feeding test, he carbon source addition have certain effect on groundwater. Analytical methods and test results are accumulated successful experience for the similar experiments, and the analytical methods and test results can provide reference for the In-situ groundwater remediation engineering application and promotion.