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时间:2018-04-29
《淤泥生态浮床的构建及其对富营养化水体净化效果》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、LakeSci.(湖泊科学),2010,22(5):660-665http:#www.jlakes.org.E—mail:jlakes@niglas.ac.cn◎2010byJournalofLakeSciences淤泥生态浮床的构建及其对富营养化水体净化效果胡光济,周曼,侯浩波,张维昊,陈丹阳(1:武汉大学资源与环境科学学院,武汉430079)(2:华中师范大学附属第一中学,武汉430223)摘要:利用武汉月湖清淤底泥为主要原料,配以膨胀珍珠岩为轻质材料、灰渣胶凝材料为粘合剂制得淤泥生态浮床,并考察其对富营养化水体的改善效果.研究表明,湖泊淤泥、膨胀珍
2、珠岩、灰渣胶凝材料掺量分别为60%、15%、25%时,浮床模块的密度、抗压强度、抗折强度、吸水率、软化系数达到797.2k:g/m、1.02MPa、0.21MPa、13.2%和85.5%,满足设计需要.在为期32d的净水试验中,淤泥生态浮床对富营养化水体净化效果较好,TN、佃、NH4+.N、P0.P、CODM、Ch1.a的去除率最高分别可达31.1%、38.6%、37.2%、36.9%、39.7%和48.8%.淤泥生态浮床有效解决了湖泊清淤底泥的处置问题,并且可对富营养化水体取得较好的生态修复效果,适合推广使用.关键词:湖泊淤泥;淤泥浮床;抗压耐水性能;
3、富营养化水体;净化效果ConstructionofsludgefloatingbedandpurificationeficiencytoeutrophicwaterbodyHUGuangji,ZHOUMin,HOUHaobo,ZHANGWeihao&CHENDanyang(1:SchoolofResourceandEnvironmentalScience,WuhanUniversity,Wuhan430079,P.R.China)(2:№.1MiddleSchoolAt~chedtoCentralChinaNormalUniversity,Wuhan43
4、0223,P.R.China)Abstract:AsludgefloatingbedusingdredgedsludgefromtheLakeYuehuasmainmaterialwasconstructed,andexpandedperliteandslageementitiousmaterialalsointroducedasthelight—weightagentandthebindingagent.Theeffectofimprovementofthefloatingbedoneutrophicwaterqualitywasinvestigate
5、d.Theresultshowedthatthedensity,compressivestrength,flexuralstrength.waterabsorptionandsoflencoeficientofthesmalmoduleofsludgefloatingbedwere797.2ks/m,1.02MPa,0.21MPa,13.2%and85.5%,respectively.Whenthemixingamountoflakesludgewas60%,andexpandedperliteandslagcementitiousmaterialwas
6、15%and25%,respectively,theresultsofthe32days’waterpurificationexperimentshowedthatthesludgefloatingbedhadfavorableeffectonthepurificationofeutrophicwater,andthehighestremovalratesofTN,TP,NH;-N,po43-_PCODMandCh1.awere31.1%,38.6%,37.2%,36.9%,39.7%and48.8%,respectively.Allthoseshowt
7、hatthe,sludgefloatingbedcannotonlysolvetheproblemofdepositionofthedredgedsludgeeficiently,butalsocouldhavefavorableper-formanceintherestorationofeutrophicwater,thusitisworthytowidelyutilization.Keywords:Lakesludge;sludgefloatingbed;compressivestrengthandanti—softenability;eutroph
8、icationwater;purificationeficiency水体富营养化
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