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1、地積累指數(shù)法在土壤重金屬污染評價(jià)中的應(yīng)用摘要:應(yīng)用地積累指數(shù)對廣州5個(gè)郊區(qū)的土壤重金屬污染情況進(jìn)行了評價(jià)研究.從廣東省土壤重金屬背景值計(jì)算的地積累指數(shù)結(jié)果來看,廣州郊區(qū)土壤中Hg和Cd都達(dá)到中度污染,Zn為輕度-中度污染,Pb,As,Cu,Cr,Ni都不存在污染.從8種元素的分級頻率來看,Hg的污染頻率最大,達(dá)到89.8%;其次是Cd和Zn,分別是78.2%和54.6%;其余5種元素污染頻率的大小順序?yàn)镻b,As,Cu,Cr,Ni;Hg出現(xiàn)了5.9%的極嚴(yán)重污染.廣州5個(gè)郊區(qū)的污染元素和元素的污染程度存在著明顯的差別,Q型聚類分析將海珠區(qū)、芳村區(qū)、天河區(qū)和黃埔區(qū)
2、聚為一類,為較高程度污染區(qū);而把白云區(qū)單列一類,為低污染區(qū);同時(shí),整個(gè)廣州的污染情況與白云區(qū)聚為同一類.關(guān)鍵詞:土壤重金屬;污染評價(jià);地積累指數(shù);廣州中圖分類號:X53 文獻(xiàn)標(biāo)識碼:A 文章編號:0253-374X(2006)12-1657-05ApplicationofIndexofGeoaccumulation(Igeo)toPollutionEvaluationofHeavyMetalsinSoilCHAIShiwei1,2,WENYanmao2,ZHANGYalei1,ZHAOJianfu3(1.StateKeyLaboratoryo
3、fPollutionControlandResourcesReuse,TongjiUniversity,Shanghai200092,China;2.SchoolofEnvironmentalScienceandEngineering,ZhongshanUniversity,Guangzhou510275,China;3.KeyLaboratoryofYangtzeRiverWaterEnvironmentoftheMinistryofEducation,TongjiUniversity,Shanghai200092,China)Abstract:Polluti
4、onofheavymetalsinsoilinGuangzhousuburbsisevaluatedonthebasisoftheindexofgeoaccumulation.TheresultsshowthatthepollutionofHgandCdinthesoilofthesuburbsofGuangzhouCityisclassifiedasmoderatedegree,andthatofZnasbetweenslightandmoderatede2grees,andfiveothermetalsofnopollutionaccordingtother
5、esultsofIgeobasedonthebackgroundval2ueofheavymetalsinthesoilofGuangdongProvince.ThepollutionfrequencyofHgis89.8%,thehighestamongthe8metals,andthoseofCdandZnare78.2%and54.6%respectively,nexttothehighest,andthepollutiondegreeoftheotherfivemetalscanbeputinthisorder:Pb,As,Cu,Cr,Ni,ofwhic
6、hPbisthehighestandNiisthelowest.Hgcausesveryseriouspollution,foritreaches5.9%.Therearequitedifferentpollutingmetalsandpollutingdegreesinthe5suburbsofGuangzhouCity.Haizhu,Fangcun,TianheandHuangpuaregroupedintothesamedegree,whicharetheheavilypol2lutedareas.Baiyunisalessheavilypolluteda
7、rea,thesameasGuangzhouCity.Keywords:heavymetalinsoil;pollutionevaluation;indexofgeoaccumulation;Guangzhoucity第34卷第12期2006年12月同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版)JOURNALOFTONGJIUNIVERSITY(NATURALSCIENCE)Vol.34No.12 Dec.2006 Muller[1]曾提出用地積累指數(shù)定量評價(jià)沉積物中的重金屬污染程度,并定了相應(yīng)的污染程度級別劃分標(biāo)準(zhǔn)(表1).這種評價(jià)方法也可用來評價(jià)土壤中重金屬的污染程度及其分級
8、情況[2,3].廣州市郊