污染河水中磷对浅层地下水的影响  

Influence on shallow groudwater by phosphorus in polluted river

作　　者：李志萍[1] 陈平货[2] 阴国胜[3] 

机构地区：[1]华北水利水电学院岩土工程系,河南郑州450008 [2]河南省水利勘测总队,河南郑州450003 [3]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《吉林大学学报（地球科学版）》2004年第3期435-440,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(49832005);国家重点基础研究发展规划项目(G1999045706)

摘　　要：室内试验选用3种天然砂土作为渗透介质,以生活污水模拟排污河水,发现中砂(>92%)对总磷的去除效果明显好于粗砂(60%～80%),并且随渗透介质深度的增加总磷的去除率增加。磷的去除机理主要是吸附和沉淀,由于吸附作用很快达到饱和,所以沉淀反应是排污河中磷的最重要的去除机理。野外抽水的试验结果表明:凉水河中的总磷对地下水影响较小。虽然在排污河形成早期总磷在粗砂中会产生穿透,但随着时间的推移,由于河流底泥的形成,磷大部分被截留于底泥和介质内部,能够直接进入地下水的量很少。In the lab-scale experiment,three kinds of natural sand were chosen as infiltration medium to simulate polluted river water using domestic sewage. The experimental results showed that medium sand had a higher contamination removal ratio (>92%)than coarse sand(60%～80%), and removal ratios of total phosphorus increased with the depth of media. The mechanism of phosphorus removal are adsorption and precipitation. Because the saturation state could be achieved as the result of adsorption in no time, precipitation is the most important mechanism to remove the phosphorus in the polluted river. Fieldpumping test indicated that the phosphorus in Liangshui River had a little effecton groundwater quality. Although total phosphorus can seep into coarse sand in the earlier times of river polluting, most of phosphorus is intercepted caught in mud and media formed with time and little phosphorus can enter into groundwater.

关 键 词：污染河水 总磷 地下水 

分 类 号：X52[环境科学与工程—环境工程]