铜陵市及其周边地区土壤重金属元素污染评价_图文

1、 20lO年6月殷汉琴,等:铜陵市及其周边地区土壤重金属元素污染评价June,2010cm,南部低山丘陵区单点分析土壤样品,北部冲积平原区以1个样/4km2分析组合样。如图1所示,测试指标为As、cd、Cu、zIl、Pb等重金属元素,由安徽省地质实验研究所完成,共获得6踟个土壤样品分析数据。元素报出率、检出限及分析准确度、精密度等质量指标均符合(D!2005一Ol多目标区域地球化学调查规范>(1:250000要求。2结果与讨论2.1表层土壤As、Cd、Pb Cu、Zn质量比特征 内梅罗综合指数评价法评价土壤中蕈金属污染的方法众多,目前采用的方法主要有地质累积指数法、潜在生态危害指数法、脸

2、谱图法、内梅罗综合指数法、污染负荷指数法。本文采用内梅罗综合指数法【l 5】进行土壤污染评价。该方法兼顾了单因子污染指数均值和最大值,突出了重污染因子的影响,能全面、直ji9巴地反映土壤的总体质量。I单因子污染指数。Pi=Ci/Si(1式中PI为土壤中i污染物的单因子污染指数;Ci为土壤中i污染物的实测值;si为i污染物的评价标准值。本文采用<土壤环境质最标准>(GB 15618-1995中士壤重金属2级标准质量比限值(表2作为参比标准,以识另ll保障农业生产、维护人体健康的污染土壤和污染程度。2内梅罗综合污染指数。P:浮(2利用上述公式及划分标准,对铜陵土壤中重金属污染进行评价,

3、分别计算出所获680个土样的Pl值及P值(i=1,2,。680。表4列出r铜陵市土壤中重金属单因子污染指数(只范围、均值及各污染等级的面积等指标。圈l铜陵市矿区、冶金企业分布及土壤采样点位圈F堙.1M陆嗥and metallurgy即衄q曩s巧and母0iI锄pIing p蛐in TI岫崦囊2土壤环境质量2级标准值mgkfTable 2Thes伽岫standardof soilenvironmentalquality项目pH<6.5pH=6.57.5pH>7.5As水田302520As旱地403025Cd50100100Cu果园150200200Zn 250300350Pb2002

4、50300裹3±壤重金曩污染指数评价分级标准Table 3Standard ofdassificatioufor evaluationOnFollutleeindex ofheavymetals等级划分污染指数污染程度环境影响戮盥臀譬登篓量。裳篓譬绿色蒌瓣嚣品产地环境质垣评价纲引试行”中国污染指数最大值;Pi.。为土壤中各污染因子污染指数平均值。一。寰l铜陵市土壤中重金属质比特征Table 1Characteristics of thelgtassratio of heavymetals 20IO年6月殷汉琴,等:铜陵市及其周边地区土壤蘑金属元素污染评价June,2010图中所示的1

5、.5级分别和表3上壤萤金属污染指数评价分级标准等级划分一致固2铜陵市重金属As、Cd、Pb、Cn、Zn以及综合污染程度图Fk.2I联I“of pollution in Toagli雌IPOUYAT R V,MC DONNEL M J,PICKETT S T A,Soll characteris-tics of oak stands along an urban-rural land use gradientJ.Journal of Environmental Quality。1995,24(3:516526.2TILLER K G.Urban soil contamination in Aus

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8、anjing Cityj.Acta Pedologica Sirriea(土壤学报。2003,40(6:921928.6LU Ying(卢瑛,GONG Zitong(龚子同,ZHANGGanlin(张甘霖,factorJ】.Chinese Journal o,Applied Ecology(应用生态学报, 2004,is(i:123126.7YANG sucai(杨苏才.ZENG JiT滔ins(曾静静.WANG shn班(王胜利,d a1.Assessment On heavy metals(cu.zn,Pbpollution and analysis onthe causation of

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10、金属元素污染评价 作者： 作者单位： 刊名： 英文刊名： 年，卷(期： 殷汉琴， 陈富荣， 陈兴仁， 陈永宁， 贾十军， 王晓莺， YIN Han-qin， CHEN Fu-rong ， CHEN Xing-ren， CHEN Yong-ning， JIA Shi-jun， WANG Xiao-ying 安徽省地质调查院,合肥,230001 安全与环境学报 JOURNAL OF SAFETY AND ENVIRONMENT 2010,10(3 参考文献(20条 1.TILLER K G Urban soil contamination in Australia Aust外文期刊 1992(02

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