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时间:2020-04-21
《聚磷污泥去除高浓度铅的影响因素研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第201334年卷6第月6期环境科学Vo1.34,No.6Jun.,2013ENVIRONMENTALSCIENCE聚磷污泥去除高浓度铅的影响因素研究杨敏,卢龙,冯涌,方超,李雄清(1.南昌大学环境与化学工程学院,南昌330000;2.江西省环境监测中心站,南昌330000)摘要:利用聚磷活性污泥去除废水中的铅[P(Pb“)=150.0mg·L],研究了反应体系内不同溶解氧状况和初始pH值对污泥除铅的效率和稳定性的影响.结果表明,厌氧条件下,pH6时,铅的去除率随时间增长呈上升趋势,32d后铅去除率达99.8%,其中有机物及硫化物结合态铅、残渣态分别占41.8%和
2、52.6%,污泥中铅的稳定性良好.好氧条件下,在相对较短时间内铅的去除率随pH上升而增加,反应2h时,pH6、pH4和pH2对应的铅的去除率分别为99.9%、96.9%和30.3%;而好氧32d后pH6、pH4和pH2的污泥中残渣态铅含量分别为3072.3、4726.8和2359.1mg·kg~,分别占污泥中总铅的41.8%、65.8%和88.8%.综合考虑除铅率和除铅后污泥稳定性,好氧且pH4理论上是聚磷污泥除铅的最佳条件.关键词:聚磷;污泥;重金属;铅;影响因素中图分类号:X703.1文献标识码:A文章编号:02503301(2013)062309.05Inf
3、luencingFactorsofHigh-ConcentrationLeadRemovalUsingthePhosphorus-AccumulatingSludgeYANGMin,LULong,FENGYong一,FANGChao,LIXiong-qing(1.SchoolofEnvironmentandChemicalEngineering,NanchangUniversity,Nanchang330000,China;2.JiangxiProvincialEnvironmentalMonitoringCenter,Nanchang330000,China)A
4、bstract:Phosphorus·accumulatingactivatedsludgewasusedtoremovelead[P(Cu“)=150.0mg·L]inwastewaterinthisexperiment.TheeficiencyratioandstabilityofPbremovalwerestudiedatdifferentdissolvedoxygenconcentrationanddifferentinitialpH.TheresultshowedthatunderanaerobicconditionandpH6,thePbremoval
5、eficiencyratioincreasedwithtimeelapsing,thevaluereached99.8%after32days.Leadinformoforganicandsulfide-boundleadandresidualleadinresidualsludgeaccountedfor41.8%and52.6%,respectively,andtheleadinthesludgeshowedagoodstability.Whileunderaerobiccondition,theleadremovaleficiencyratioincreas
6、edwiththeincreaseofpHwithinthefirst2hours,thevaluesreached99.9%,96.9%and30.3%atpH6,pH4andpH2,respectively.Incontrast,theresidualleadwas3072.3,4726.8and2359.1mg·kgunderaerobicconditionafter32days,accountingfor41.8%,65.8%and88.8%oftotalleadinthesludge.Takingtheleadremovaleficiencyratioa
7、ndleadstabilityintoaccount,aerobicconditionatpH4isthebestforremovingleadwithphosphorus—accumulatingsludgeintheory.Keywords:phosphorus—accumulating;sludge;heavymetals;lead;influencingfactors活性污泥作为一种高效的生物吸附剂,常被用对控制重金属污染、资源化利用污泥具有重要于处理含重金属废水⋯.但是一般污泥吸附的重金意义.属容易解吸,生物可利用性高,处理后的污泥非1材料与方法但不能资
8、源化利用,
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