水平潜流人工湿地对水中Cd2+、Zn2+及营养物的去除  

REMOVAL PROPERTIES OF Cd2+,Zn2+ AND NUTRIENTS IN HORIZONTAL SUBSURFACE FLOW CONSTRUCTED WETLANDS

作　　者：余关龙[1,2] 付永江 彭海渊 严晓江 杜春艳 YU Guan-long;FU Yong-jiang;PENG Hai-yuan;YAN Xiao-jiang;DU Chun-yan(School of Hydraulic Engineering,Changsha University of Science and Technology,Changsha 410114,China;Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province,Changsha 410114,China;Engineering and Technical Center of Hunan Provincial Environmental Protection for River-Lake Dredging Pollution Control,Changsha 410114,China)

机构地区：[1]长沙理工大学水利工程学院,长沙410114 [2]洞庭湖水环境治理与生态修复湖南省重点实验室,长沙410114 [3]湖南省环境保护河湖污染控制工程技术中心,长沙410114

出　　处：《环境工程》2019年第10期116-120,共5页Environmental Engineering

基　　金：国家自然科学基金青年基金项目(51308069、51109016);湖南省水利科技项目(湘水科计[2017]230-22、[2016]194-12);湖南省自然科学基金(2018JJ3549)

摘　　要：近年来,洞庭湖富营养化、重金属问题对湖区生态系统造成了越来越严重的影响。为减轻洞庭湖污染现状,以本地芦苇、香蒲为湿地植物,以碎石为基质,构建水平潜流人工湿地对人工配制重金属及营养物污水进行处理。结果表明:间歇运行方式Ⅰ、Ⅱ和Ⅲ,在污水运行2 d后NH4^+-N去除率分别达到86.9%、76.7%和66.7%,COD去除率在3 h后分别达到89.6%、84.9%和92.9%;人工湿地连续运行结果显示,COD去除率在整个运行时段稳定在85%左右,NH4^+-N去除率最终稳定在78.0%左右,运行44 d后Cd^2+去除率高于99.8%,Zn^2+去除率在整个运行时段均高于96.9%。In recent years,the problems of eutrophication and heavy metals in the Dongting Lake has caused significant impact on the lake ecosystem.In order to reduce the pollution of the Dongting Lake,Phragmites australis and Typha orientalis Presl were used as wetland plants and breakstone was used as a matrix in horizontal subsurface flow constructed wetland.Two operation modes including,intermittent and continuous,were applied to treat wastewater polluted by heavy metal and nutrients.The results showed that the removal rates of NH4^+-N reached 86.9%,76.7%and 66.7%under the intermittent operationⅠ,ⅡandⅢafter 2 d,and the COD removal rate reached 89.6%,84.9%and 92.9%with 3 h.The continuous operation results showed that the removal rate of COD was stable at about 85.0%throughout the operation period,the removal rate of NH4^+-N was finally stabilized at about 78.0%,the removal rate of Cd^2+was greater than 99.8%after 44 days,and the removal rate of Zn^2+was kept 96.9%above throughout the operation period.

关 键 词：人工湿地 重金属 水力停留时间 连续运行 

分 类 号：X703[环境科学与工程—环境工程]