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《城市污泥与花生壳制活性炭的重金属形态分析及生态风险评价-论文.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、农业环境科学学报2012,31(11):2284-2289JournalofAgro—EnvironmentScience城市污泥与花生壳制活性炭的重金属形态分析及生态风险评价赵晶晶,周少奇,,,陈安安,林奕明(1.华南理工大学环境科学与工程学院,广州510006;2.华南理工大学亚热带建筑科学国家重点实验室,广州510640;3.广东省教育厅环境保护与生态修复重点实验室,广州510006)摘要:采用BCR提取法对以污泥和花生壳为原料制备的活性炭进行重金属形态分析,利用原子吸收法测定污泥热解前后cd、cr、cu、zn、Ni、Ph的不同形态
2、含量。结果表明,污泥中zn的含量最高,zn和cu的含量超过了污泥农用标准。热解可使污泥中的可溶解态和可还原态重金属转化为性质稳定的残渣态重金属,在此基础上,利用重金属潜在生态风险指数法(I)对污泥活性炭的重金属潜在生态风险进行评价,结果得出花生壳添加量为20%,热解温度为600℃条件下,制备出来的活性炭风险最小。同时证实cd的潜在生态风险系数较大,在利用时应引起足够的重视。关键词:污泥;活性炭;重金属;形态变化;生态风险评价中图分类号:X799_3文献标志码:A文章编号:1672—2043(2012)11-2284—06Morpholog
3、icalAnalysisandEcologicalRiskAssessmentonHeavyMetalsintheActivatedCarbonPreparedfromSewageSludgeandPeanutHullZHAOJing-jing,ZHOUShao-qi'’,CHENAn—an,LINYi—ming’(1.CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou,510006,China;2.StateKeyL
4、ab—oratoryofSubtropicalBuildingScience,SouthChinaUniversityofTechnology,Guangzhou.510640,China;3.KeyLaboratoryofEnvironmen—talProtectionandEco—remediationofGuangdongregularHigherEducationInstitutions,SouthChinaUniversityofTechnology,Guangzhou5lO0o6.China)Abstract:Thespeci
5、ationanalysisofheavymetalshadbeencarriedoutbyBCRextractionmethodinactivatedcarbonwhichwasmadeofsewagesludgeandpeanuthul1.ThecontentsofCd,Cr,Cu,Zn,NiandPbwiththeirfourspeciationstatesinsewagesludgeandtheproductsofsludgepyrolysishadbeenmeasuredbyAAS(AtomicAbsorptionSpectrom
6、etry)forthestudythespeciationchangingofheavymetalafterpyrolysis.TheresultsshowedthatthetotalcontentofZnwasthehigherthantheotherheavymetalinthesewagesludge,andthetotalcontentsofZnandCuwereexceededthatthevaluesinthefanningstandards.Moreover.theacid-solubleandthereductionsta
7、teofheavymetalsinthesewagesludgecouldbetransformedintotheresidualstatesintheactivatedcarbonaftertheprocessofpyrogenation.Withthecomprehen—sivestudyingofvariousstablestateratiosofheavymetalsinthecarbonsobtainedatdiferentconditions,thepyrolysistemperaturefortheae—tivatedcar
8、bonwasobtainedat600oC.Furthermore,apotentialecologicalriskassessmentonheavymetalsinsludgeactivat
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