地下渗滤系统不同基质层对污染物的去除效果  

Effects of Subsurface Depths on Pollutant Removal with SWIS

作　　者：李英华[1] 孙铁珩[1,2] 李海波[2] 徐新阳[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004 [2]沈阳大学区域污染环境生态修复教育部重点实验室,辽宁沈阳110044

出　　处：《东北大学学报（自然科学版）》2010年第5期737-740,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50908151);辽宁省教育厅创新团队资助项目(2009T069);辽宁省自然科学基金资助项目(20082195);沈阳市科技计划资助项目(1081237-1-00)

摘　　要：以草甸棕壤为介质构建了污水地下渗滤模拟系统SWIS,监测有机污染物和氮、磷的浓度变化,研究不同深度基质中污染物的去除效果及削减规律.结果表明:进水负荷0.04m3.(m2.d)-1,散水深度55cm时,地下渗滤系统对有机物、氮、磷有较好的去除效果,去除率随时间延长趋向稳定,不同基质层对污染物的去除效果依次为Q(100)>Q(80)>Q(20)>Q(40)>Q(60);20～40cm基质层是有机物去除的主要范围,除污机制是物化吸附与生物降解;硝化作用主要发生在0～60cm的基质层,80cm以下区域反硝化作用为主导;基于Langmuir吸附模式的草甸棕壤磷最大吸附量为545.6mg.kg-1.SWIS as a simulation system was set up with brown meadow soil as filtering medium to monitor the changes in the concentrations of organic pollutants,nitrogen and phosphorus and investigate how the pollutants are removed at different depths of the matrix and the removal efficiency.The results revealed that the SWIS can get rid of organic matter,nitrogen and phosphorus well when the daily wastewater intake is 0.04m3/m2 and wastewater dispersion depth 55cm,and the removal rate tends to stable with time prolonged.The sequence of pollutant removal efficiencies in accordance to the depth of matrix is Q（100）Q（80）Q（20）Q（40）Q（60）,where the basic range of removing organic matter is at the depth 20～40cm via physical-chemical adsorption and biodegradation.It was found that the nitrification mainly takes place at the depth 0～60cm,while the denitrification plays the leading role in the region below the depth 80cm.Based on the Langmuir adsorption model,the maximum adsorption capacity of phosphorus in brown meadow soil is 545.3mg/kg.

关 键 词：生态处理 生活污水 地下渗滤 有机物 氮 磷 

分 类 号：X703.1[环境科学与工程—环境工程]