第51卷第2期2023年1月广州化工GuangzhouChemicalIndustryVol.51No.2Jan.2023基于PMF模型的龙子湖表层沉积物重金属源解析∗丁怡丹,刘微,吴澳(蚌埠学院土木与水利工程学院,安徽蚌埠233030)摘要:为了准确地鉴别龙子湖表层沉积物中重金属来源,从野外采集了21个沉积物样品,测定了沉积物中Cd、Cu、Mn、Ni、Pb和Zn的含量,并用PMF模型进行了来源识别。研究结果显示,表层沉积物中六种重金属的平均含量分别为1.31,29.20,436.8,30.93,27.58,151.7mg/kg。除Mn外,其它五种重金属的平均含量均超安徽省土壤背景值,其中Cd超背景值程度最高。PMF解析结果显示,龙子湖表层沉积物重金属主要受工农业活动、交通及土壤母质造成的自然来源的共同影响。其中,Mn在沉积物中的积累以自然源为主,Cd、Zn的来源以工农业排放为主,Pb、Cu的积累则主要源自交通污染,Ni具有自然和人为的共同来源。关键词:PMF;表层沉积物;重金属;源解析中图分类号:X142;X53文献标志码:A文章编号:1001-9677(2023)02-0168-03∗基金项目:安徽省大学生创新创业训练计划项目(No:S202011305062)。第一作者:丁怡丹(2000-),女,本科在读。SourceAnalysisofHeavyMetalsinSurfaceSedimentsofLongziLakeBasedonPMFModel∗DINGYi-dan,LIUWei,WUAo(CollegeofCivilEngineering,BengbuUniversity,AnhuiBengbu233030,China)Abstract:InordertoaccuratelyidentifythesourceofheavymetalsinthesurfacesedimentsofLongziLake,21sedimentsampleswerecollectedfromthefield,thecontentsofCd,Cu,Mn,Ni,PbandZninthesedimentsweredetermined,andthesourcewasidentifiedbyPMFmodel.Theresultsshowedthatthemeanconcentrationsofthesixheavymetalswere1.31,29.20,436.8,30.93,27.58,151.7mg/kg,respectively.ExceptMn,themeanconcentrationsoftheotherfiveheavymetalsinthesurfacesedimentsexceededthesoilbackgroundvalueofAnhuiprovince,andthedegreeofCdexceededthebackgroundvaluewasthehighest.PMFanalysisresultsshowedthattheheavymetalsinthesurfacesedimentsofLongziLakeweremainlyaffectedbyindustrialandagriculturalactivities,atmosphericdepositioncausedbytrafficandnaturalsourcescausedbysoilparentmaterials.Amongthem,theaccumulationofMninsedimentswasmainlyfromnaturalsources,thesourcesofCdandZnweremainlyfromindustrialandagriculturalemissions,theaccumulationofPbandCuwasmainlyfromtrafficpollution...
