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1、應用與環(huán)境生物學報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;heavymetalCLCX705?X503.233垃圾填埋場滲濾液灌溉地土壤和植物中重金屬積累33姜必亮王伯蓀藍崇鈺(中山大學生命科學學院廣州510275)摘要分別在廣州市李坑垃圾填埋場有滲濾液回灌的地表和未經滲濾液回灌的地表隨機采集土樣,深度達1m,同時分別采集長于灌溉地和非灌溉地上的三個
6、優(yōu)勢植物種(牛筋草,孔雀稗和狗牙根)為代表,調查滲濾液灌溉后土壤和植物的重金屬(Cu,Zn,Pb,Cd)積累效應.結果表明,滲濾液灌溉地的不同深度土壤和地表植物體內都有不同程度重金屬積累.經t2檢驗,Cu,Pb和Cd在所調查的各土層內的積累效應在α=0.05時都達到顯著水平,而Zn只在0～20cm土層里達到顯著水平.植物體內只有Cd的積累效應達到顯著水平,說明所調查的3種植物對重金屬具有一定的耐性,適合用于垃圾填埋場的植被恢復材料.圖2表3參17關鍵詞垃圾填埋場;滲濾液;灌溉;重金屬CLCX705?X503.231INTRODUCTIONThecompositionofleac
7、hateisvariableanddependsonmanyfactorssuchasthecompositionofwastes,landfillingage,[1]depthandmicrobiologicalenvironmentofthelandfill.Substancesthatcommonlyoccurinleachateincludedifferentmajorions,heavymetals,andawidevarietyoforganiccompoundsandmicro
