不同浅层含水介质系统对排污河渠中磷去除效果影响的模拟实验  

SIMULATING EXPERIMENT OF IMPACT ON PHOSPHORUS REMOVAL IN CONTAMINATED RIVERS AND DITCHES THROUGH DIFFERENT SHALLOW AQUIFEROUS MEDIA SYSTEMS

作　　者：李志萍[1] 陈鸿汉[1] 李海明[1] 张达政[1] 陈肖刚 

机构地区：[1]中国地质大学水资源与环境工程学院 [2]河南省地质工程公司,河南郑州450053

出　　处：《现代地质》2003年第2期176-180,共5页Geoscience

基　　金：国家重点基础研究发展规划项目 (G19990 45 70 6 );国家自然科学基金项目 ( 49832 0 0 5 )。

摘　　要：通过模拟 3种不同的浅层地下含水介质系统对排污河渠中磷去除实验 ,发现不同的含水介质对排污河渠中的总磷都有去除和净化的功能 ,并随着含水介质厚度的增加 ,总磷的去除率逐渐升高。不同的含水介质对总磷的去除效果不同 ,中砂对总磷的去除效果明显优于粗砂。去除磷的主要机理为吸附和沉淀 ,含水介质对磷去除的主要影响因素有介质的颗粒大小、不均匀系数、粘粒含量等。由于排污河渠长期的污水渗漏会在河床底部形成底泥 ,增强了对磷的去除效果 ,所以排污河渠一般不易造成对地下水的磷污染。Simulation experiment research on phosphorus removal of contaminated rivers and ditches through three kinds of shallow aquiferous media systems,it was found that total phosphorus of contaminated rivers and ditches can be removed in different aquiferous media, removal ratios of total phosphorus increased with the depth of the media, different aquiferous media have different removal results and medium sand has a higher removal ratio than coarse sand. The mechanism of phosphorus removal are adsorption and precipitation. The influence factors of aquiferous media on total phosphorus removal are grain size of media, variation coefficient, clay content and so on. Due to long period leakage of contaminated rivers and ditches, the mud at the bottom of river bed increases the phosphorus removal, so groundwater generally could not be polluted by the phosphorus in contaminated rivers and ditches.

关 键 词：排污河渠 磷去除 含水介质 模拟实验 

分 类 号：P641[天文地球—地质矿产勘探] X141[天文地球—地质学]