基质粒径和沿程变化对生态滤床净化效果的影响  

Influence of Matrix Particle Size and Streamwise Chang to Purification Effects of Ecological Filters

作　　者：胡欢[1] 周明涛[1] 杨平[1] 

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《中国水土保持》2013年第6期55-57,77,共3页Soil and Water Conservation in China

基　　金：三峡大学博士启动基金项目(KJ2011B006);国家自然科学基金项目(51079076)

摘　　要：为了解基质粒径和沿程变化对生态滤床净化效果的影响,试验设计了0～2、2～15、15～30、30～50 mm 4组不同基质粒径的多级生态滤床,并用其净化受污染河水。试验结果表明:基质粒径的大小对生态滤床净化污染河水水质有较大影响,随着基质粒径的增大,其对水体中污染物的去除效果逐渐减弱;污染物在生态滤床中去除速率的沿程变化是,污染物的去除速率在开始阶段很快,但随着水流在生态滤床内迁移距离的延长其去除速率逐渐减弱并趋于平缓,且各污染物最终也不可能完全被去除掉,其浓度将在生态滤床末端较长的距离内保持一个相对比较稳定的数值。In order to understand the influence of matrix particle size and streamwise chang to the purification effects of ecological filter,the paper designed and tested 4 groups of 0-2,2-15,15-30 and 30-50 mm multilevel ecological filters with different matrix particle size for purifying the polluted river water.The outcomes show that a) the size of matrix particle diameter has greater influence to the purifying quality of the polluted water.The removal effects of pollutants in water is getting smaller along with the increase of matrix particle size;b) the streamwise chang of pollutants removal rate of ecological filter is fast at the initial stage and is getting slower and gentle along with the extension of removal distance of flow in ecological filter.In addition,it is impossible to remove all the pollutants and the concentration will keep a relative stable value in a longer distance at the end of the ecological filter.

关 键 词：生态滤床 基质 粒径 沿程变化 净化效果 

分 类 号：X703[环境科学与工程—环境工程]