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《层状双金属氢氧化物覆膜改性人工湿地无烟煤基质除磷.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中国环境科学2014,34(9):2239-2244ChinaEnvironmentalScience层状双金属氢氧化物覆膜改性人工湿地无烟煤基质除磷张翔凌,陈巧珍,陈俊杰,郭露,王晓晓,刘小英,姜应和(武汉理工大学土木工程与建筑学院,湖北武汉430070)摘要:分别选取MgCI2、ZnCI2、CaC12、CoCI3、FeC13、AICI3等6种金属化合物合成9种不同类型层状双金属氢氧化物(LDHs),利用其对垂直流人工湿地无烟煤基质进行LDHs覆膜改性;构建模拟基质试验柱,对改性前后的无烟煤基质进行模拟垂直流人工湿地净化污水试验.结果表明:相对于原始无烟煤基质,
2、各种LDHs覆膜改性基质对总磷、溶解性总磷、颗粒态磷和磷酸盐的去除率均有不同程度的提高;Zn参与合成的改性基质对总磷、溶解性总磷、颗粒态磷和磷酸盐均有很好的去除效果,其中ZnCo-LDHs和ZnA1一LDHs改性基质对总磷和溶解性总磷的平均去除率超过95%,对磷酸盐平均去除率达到98%以上.关键词:垂直流人工湿地;无烟煤基质;覆膜改性;除磷效果;ZnCo—LDHsZnAI—LDHs中图分类号:X52文献标识码:A文章编号:1000—6923(2014)09—2239—06Removalratesofphosphorusbymodifiedanthracitesub
3、stratescoatedwithdifferentlayereddoublehydroxidesreactedbydifferentmetalcompoundsinvertical-flowconstructedwetlands.ZHANGXiang-ling’,CHENQiao-zhen,CHENJun-jie,GUOLu,WANGXiao-xiao,LIUXiao-ying,JIANGYing·he(SchoolofCivilEngineeringandArchitecture,WuhanUniversityofTechnology,Wuhan430070,
4、China).ChinaEnvironmentalScience,2014,34(9):2239-2244Abstract:Ninediferentkindsoflayereddoublehvdroxides(LDHs)wereCO.precipitatedsynthesizedunderalkalineconditionsusingMgCI2,ZnC12,CaC12,CoCI3,FeC13,andA1C13.Thesimulatedtestcolumnswereconstructedusingthemodifiedanthracitesubstratesin-s
5、itucoatedwiththediferentsynthesizedLDHstotreattheurbansewage,andthecontroltreatment(usinganthraciteasthesubstrates)wassetupatthesanletime.Comparedwithcontrol,theremovalratesoftotalphosphorus,totaldissolvedphosphorus,particulatephosphorusandphosphateintheefluentwereimprovedatdiferentde
6、greesatiertreatingwiththeninemodifiedanthracitesubstrates:ThemodifiedanthracitesubstrateswithZshowedgoodremovaleficiencytototalphosphorus,totaldissolvedphosphorus,particulatephosphorusandphosphate.Inparticular,themodifiedanthracitesubstratescoatedwithZnCo—LDHsandZnA1一LDHsshowedaverage
7、removalratesof95%tototalphosphorusandtotaldissolvedphosphorus,and98%tophosphate.Keywords:vertical—flowconstructedwetlands;anthracitesubstrates;coatedmodification;removaleficienciesofphosphorus;ZnCo—LDHs;ZnA1一LDHs人工湿地利用土壤、基质、植物、微生物的效、长效、稳定除磷的目的.因此,可尝试对现有物理、化学、生物三重协同作用实现对污水的净天然基质进行适当改性以
8、提高和强化
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