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1、应用与环境生物学报2000,6(4):374～378ChinJApplEnvironBiol=ISSN1006-687X2000208225ACCUMULATIONOFHEAVYMETALINSOILANDPLANT3IRRIGATEDWITHGARBAGELANDFILLLEACHATE33JIANGBiliang,WANGBosun&LANChongyu(SchoolofLifeScience,ZhongshanUniversity,Guangzhou510275)AbstractTwoadjacentsitesofLiKenglandfill,GuangzhouCity,
2、onehavingbeenirrigatedwithleachatefortwoyearsandtheadjacentsitehavingnotnotreceivedleachate,weresurveyedtoassesstheaccumulationofheavymetals(Cu,Zn,PbandCd)insoilandinplantafterlandfillleachateirrigation.Furthermore,thedif2ferencesofthreemainplants,Eleusineindica,PaspalumthunbergiiandCyndonda
3、ctylon,dominatedthetwosites,intheaboveheavymetalcontentsbetweenoccurredonleachateirrigatedsiteandleachateunirrigatedsitewereanalyzedcomparatively.Theresultsshowedthatallheavymetalmeasureddisplayedevidentaccumulationthroughoutprofileat0.05levelexceptZn,evidentaccumulationforZnonlyoccurredin0～
4、20cmupperlayer,theaccumulationofheavymetalsinirrigatedsoildecreasedwithdepth.Plantssampledfromtheleachate-irri2gatedsitehadhighercontentsofheavymetalsthanthatsampledfromsitenotreceivingleachate.Butthediffer2enceinheavycontentinplantwasnotsignificantbetweenoccurredonlandfillleachateirrigateds
5、iteandunirri2gatedsiteexceptCd,suggestedthesespecieshadtolerancetoheavymetaltoacertainextent.Fig2,Tab3,Ref17Keywordslandfill;leachate;irrigation;heavymetalCLCX705ØX503.233垃圾填埋场渗滤液灌溉地土壤和植物中重金属积累33姜必亮王伯荪蓝崇钰(中山大学生命科学学院广州510275)摘要分别在广州市李坑垃圾填埋场有渗滤液回灌的地表和未经渗滤液回灌的地表随机采集土样,深度达1m,同时分别采集长于灌溉地和非灌溉地上的三个
6、优势植物种(牛筋草,孔雀稗和狗牙根)为代表,调查渗滤液灌溉后土壤和植物的重金属(Cu,Zn,Pb,Cd)积累效应.结果表明,渗滤液灌溉地的不同深度土壤和地表植物体内都有不同程度重金属积累.经t2检验,Cu,Pb和Cd在所调查的各土层内的积累效应在α=0.05时都达到显著水平,而Zn只在0～20cm土层里达到显著水平.植物体内只有Cd的积累效应达到显著水平,说明所调查的3种植物对重金属具有一定的耐性,适合用于垃圾填埋场的植被恢复材料.图2表3参17关键词垃圾填埋场;渗滤液;灌溉;重金属CLCX705ØX503.231INTRODUCTIONThecompositionofleac
7、hateisvariableanddependsonmanyfactorssuchasthecompositionofwastes,landfillingage,[1]depthandmicrobiologicalenvironmentofthelandfill.Substancesthatcommonlyoccurinleachateincludedifferentmajorions,heavymetals,andawidevarietyoforganiccompoundsandmicro
