防污幕墙中六价铬迁移特性模拟  

Simulation on Hexavalent Chromium Migration Characteristics in Permeable Fine-grained Sand Barrier Filters

作　　者：王宇[1,2] 李景娟[1] 段祥宝[1] 严文群 

机构地区：[1]南京水利科学研究院,南京210029 [2]河海大学土木与交通学院,南京210029 [3]扬州大学水利与能源动力工程学院,江苏扬州225009

出　　处：《灌溉排水学报》2015年第11期70-74,共5页Journal of Irrigation and Drainage

基　　金：中央科研院所公益基金项目(Y112007;Y114011)

摘　　要：重点揭示了典型污染物——铬在防污幕墙中迁移特性;建立了地下水溶质运移数学模型,0.075-0.5mm不同粒径砂组成的单级和多级防污幕墙污水处理的室内物理模拟,并进行了相应的数值模拟验证。结果表明,防污幕墙去除铬等重金属污染物行之有效,以0.5mm砂、0.2mm砂和0.1mm砂组合的多级幕墙去除率较高,且水力停留时间相对较短,处理后水质满足农田灌溉水质标准,可应用到实际工程。The hexavalent chromium migration characteristics in permeable fine-grained sand barrier filters were revealed mainly,aphysical model composed of the fine-grained sands ranging from 0.075 mm to0.5mm was tentatively designed to remove hexavalent chromium based on the underground water governing equations,and then the results were verified by numerical simulations under the corresponding experimental condition.The results showed that it was effective to use permeable fine-grained sand barrier filtersto remove hexavalent chromium,and 0.5mm,0.2mm and 0.1mm combinatorial sands had higher removal efficiency and shorter hydraulic retention time.The effluent＇s concentration,achieving the agricultural irrigation water quality standards,could be used for practical engineering.

关 键 词：防污幕墙 六价铬 迁移 模拟 

分 类 号：X703[环境科学与工程—环境工程]