典型地震灾区农业土壤重金属分布特征与评价
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摘要
在典型地震灾区彭州市通济镇新黄村选取29个农业土壤样品,其中水田土壤分层采样,研究土壤Cd、Cu、Pb、Zn空间分布特征和污染程度。结果表明:该村土壤重金属含量不等,由高到低依次为Zn、Cu、Pb、Cd。区域内耕地土壤平均重金属含量高于非耕地,安置点土壤重金属平均含量高于非安置点。水田土壤重金属含量随着土层深度增加,含量逐渐减少。在同一土层,安置点土壤重金属含量高于自然水田。土壤Cd为重污染,Cu为轻污染,Zn预警,未受Pb污染,其综合污染指数为Cd>Cu>Zn>Pb。34.48%样点受污染,绝大多数为冲积平原与丘陵交界处安置点水田土壤。
Xinhuang village,Pengzhou city is a typical "5·12" earthquake disaster area,from which twenty-nine soil samples were chosen.Among these,soil profile of paddy field was sampled according to soil layers.The study was made mainly on space distribution and pollution evaluation of Cd,Cu,Pb,Zn.The content of heavy metals in the soil samples of this village was different,with the order being Zn>Cu>Pb>Cd.Average content of heavy metals of the farming soil was higher than that of the non-farming,and average content of heavy metals of the soil under settlement spot was higher than that of the non-settlement spot.Heavy metals content of the paddy field soil reduced gradually along with the soil layer deepening,and heavy metal content of the soil under settlement spot was higher than that of the natural paddy field in the identical soil layer.Soil Cd was the heavy pollution,Cu was the light pollution,Zn was the early warning,and Pb was not polluted.Sequence of soil comprehensive pollution index was Cd>Cu>Zn>Pb.34.48% of samples were polluted,most of which were sampled from paddy field under settlement spot.
Xinhuang village,Pengzhou city is a typical "5·12" earthquake disaster area,from which twenty-nine soil samples were chosen.Among these,soil profile of paddy field was sampled according to soil layers.The study was made mainly on space distribution and pollution evaluation of Cd,Cu,Pb,Zn.The content of heavy metals in the soil samples of this village was different,with the order being Zn>Cu>Pb>Cd.Average content of heavy metals of the farming soil was higher than that of the non-farming,and average content of heavy metals of the soil under settlement spot was higher than that of the non-settlement spot.Heavy metals content of the paddy field soil reduced gradually along with the soil layer deepening,and heavy metal content of the soil under settlement spot was higher than that of the natural paddy field in the identical soil layer.Soil Cd was the heavy pollution,Cu was the light pollution,Zn was the early warning,and Pb was not polluted.Sequence of soil comprehensive pollution index was Cd>Cu>Zn>Pb.34.48% of samples were polluted,most of which were sampled from paddy field under settlement spot.
引文
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[2]孟凡乔,史雅娟,吴文良.我国无污染农产品重金属元素土壤环境质量标准的制定与研究进展[J].农业环境保护,2000,19(6):356-359.
[3]GB 15618-1995土壤环境质量标准[S].1995.
[4]夏家淇.土壤环境质量标准详解[M].中国环境科学出版社,1995:1-394.
[5]夏增禄,李森照,李庭芳,等.土壤元素背景值及其研究方法[M].北京:气象出版社,1987:289-294.
[6]Voegelin A,Barmettler K,Kretzschmar R.Heavy metal re-lease from contaminated soils:Comparison of column leachingand batch extraction results[J].Journal of EnvironmentalQuality,2003,32:865-875.
[7]中国绿色食品发展中心.绿色食品产地环境质量现状评价纲要(试行)[S].1994.
[8]付华,吴雁华,魏立华.北京南部地区农业土壤重金属分布特征与评价[J].农业环境科学学报,2006,25(1):182-185.
[9]Knechtenhofer L,Xifra I,Scheinost A C,et al.Fate ofheavy metals in a strong acidic shooting range soil:small-scale metal distribution and its relation to preferential flow[J].Journal of Plant Nutrition Soil Science,2003,166:84-92.
[10]李佩祥.市郊菜园土壤污染及治理[J].长江蔬菜,1996(2):32-34.
[11]Mohanty N,Vass I,Demeter S.Cppper toxicity affects phyt-osystemⅡ.Electon transport at the quinine acceptor,QB[J].Plant Physiol,1989,90:175-179.
[12]黄晨阳,张金霞.食用菌重金属富集研究进展[J].中国食用菌,2004,23(4):7-9.
[13]Williams C H.The effect of superphosphate on the cadmiumcontent of soil and plants[J].Aust J Soil Res,1973,11:43-56.
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