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1、第39卷第4期东南大学学报(自然科学版)Vol.39No.42009年7月JOURNALOFSOUTHEASTUNIVERSITY(NaturalScienceEdition)July2009doi:10.3969/j.issn.1001-0505.2009.04.038生态混凝土护砌模拟改善水源地水质1,211贾永志吕锡武吴义锋1(东南大学能源与环境学院,南京210096)2(江苏省水利厅,南京210029)摘要:通过构建中试规模的生态混凝土预制砌块护砌的河流生态修复实验模型,采用生态混凝###土预
2、制球、具孔矩形砌块及4球连体砌块分别护砌开挖的1,2,3河道,并以模拟传统“三面光”#护砌的4河道为实验对照,在可控条件下研究河流生态护砌方式的水质净化及生态效应.实验###结果表明:以黄浦江水为研究对象,生态护砌河道(1,2,3)在河流生态系统基本建立的条件下,水力停留时间(HRT)为2d时,生态护砌河道对CODMn,NH32N,TN的平均去除率分别超过15%,70%,50%,河水浊度均迅速降低至510NTU以下;实验河道生态护砌面基质中微生物量、TTC2脱氢酶活性以及坡面植被覆盖率和生长状况良好,
3、水质改善效果明显.模拟硬质护砌的实验河道HRT为2d时,对CODMn,NH32N,TN的去除率分别为714%,2517%,712%,河水浊度改善不明显.关键词:生态护砌;硬质护砌;水质改善;生态混凝土中图分类号:X5文献标志码:A文章编号:1001-0505(2009)0420844205Purificationofsourcewaterqualityinsimulatedriversembankedbyecologicalconcrete1,211JiaYongzhiLüXiwuWuYifeng(1
4、SchoolofEnergyandEnvironment,SoutheastUniversity,Nanjing210096,China)(2WaterResourceDepartmentofJiangsuProvince,Nanjing210029,China)Abstract:Pilot2scaleriverswereconstructedtosimulatewaterqualityimprovementandecologicalrestorationofriversembankedbyecolo
5、gicalconcrete(i.e.eco2concrete),theexperimentalgroupincludingrivers1,2and3whichwereembankedbyspheriformeco2concreteprefab2bricks,rectan2gulareco2concreteprefab2bricksandsquareeco2concreteprefab2brickswithfourhemispheroids,re2spectively,whileriver4wasemb
6、ankedbytraditionalconcreteasacontrastivegroup.Waterpurifi2cationandecologicaleffectsofdifferentembankedriverswerestudiedundercontrolledconditions.ThesourcewaterwaspipedfromHuangpuRiver,beingtakenastheresearchobject.Underthehy2draulicretentiontimeof2d,th
7、eresultsshowthattheaverageremovalratesofCODMn,NH32N,TNofrivers1,2and3are15%,70%and50%,respectively,andtheturbidityrapidlydecreasestolowerthan5.0NTU;biomassandTTC2dehydrogenaseactivityandaquaticplantswithecologicalembankmentareallingoodconditionandmakepo
8、sitiveeffectsonecologicalrestoration,thereforethewaterqualityissignificantlyimproved.Onthecontrary,theremovalratesofCODMn,NH32N,TNwithhardembankmentinriver4areonly714%,2517%and712%respectively,theturbidityhasnoobviousimprovement.
