摘要
通过土柱模拟实验研究了渗滤液性质对含水层中污染物衰减和微生物活动的影响.结果表明,新垃圾渗滤液、老垃圾渗滤液和雨水通过模拟柱后,其微生物活性分别在第12、17和3d达到最大值0.154、0.121和0.044;BOD5/COD分别在第12、8和6d达到最大值0.683、0.396和0.319;pH的平均升高速度分别为0.074/d、0.15/d和0.055/d;新、老垃圾渗滤液通过模拟柱后COD的平均去除率分别约为50%和10%;含水层介质对NH4+-N的吸附容量约为0.85 g/kg;另外,含水层介质有机质含量与微生物活性之间具有一定的相关性.由此可见,渗滤液的性质对含水层介质中污染物的衰减有重要影响.
Simulated columns filled with fine sand were conducted to investigate influences of leachate properties on pollutants attenuation and bacterial activity in aquifer.Experimental results indicated that bacterial activity of young landfill leachate,aged landfill leachate and rain water through columns was up to maximum 0.154,0.121 and 0.044 in 12 d,17 d and 3 d,respectively;the maximum BOD_5/COD was up to 0.683,0.396 and 0.319 in 12 d,8 d and 6 d,respectively,and the averaged increasing rate of pH was up to 0.074/d,0.15/d and 0.055/d,respectively.COD removal efficiencies of young and aged landfill leachate which passed columns were 50% and 10%,respectively;（NH4^＋-N） adsorption capacity of aquifer media was proximately 0.85g/kg.In addition,there was correlation between organic substrate content of aquifer media and bacterial activity.Therefore,the leachate properties had profound effects on pollutants attenuation in aquifer.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2009年第10期3110-3114,共5页
Environmental Science
基金
国家自然科学基金项目(40802055)
关键词
垃圾渗滤液
含水层
生物活性
污染物
landfill leaehate
aquifer
microbial activity
pollutants
