成都平原西部农业土壤中金属元素分布特征研究  

Investigation into Heavy Metals Distribution in the Farmland Soils in the Western of Chengdu Plain

作　　者：王英英[1] 钱蜀 邓星亮[1] 

机构地区：[1]四川省环境监测中心站,四川成都610041

出　　处：《三峡环境与生态》2012年第5期11-14,18,共5页Environment and Ecology in the Three Gorges

摘　　要：通过对成都平原西部6县(市)表层0～20cm农业土壤进行取样分析,研究了镉、镍、钒、砷、钴、铬、铜、汞、锰、铅、硒和锌等12种金属元素在土壤中的含量分布特征。并采用单因子污染指数法进行环境质量评价,得出区域土壤中镉、镍、钒、铬、铜、汞、锰和铅等8种金属元素均出现不同程度的超标,且土壤中的主要超标元素为钒、镉和镍。对比该区域背景点土壤含量,发现镉、镍、砷、钴、铬、汞、锰、铅和硒9种金属元素含量均高于背景值水平,特别是镉、汞和锰的含量明显高于背景值水平。采用Hakanson法对监测区域耕地土壤进行风险评估后得出,耕地土壤中镉和汞元素存在低度的生态风险,初步推断为断裂带土壤本底迁移和人为耕作活动的影响所致。Based on argriculture surface soils analysis resutts from six counties/cities of western Chengdu Plain, the author investigated distribution charateristics for 12 heavy metals, namely Cd, Ni, V, As, Co, Cr, Cu, Hg, Mn, Pb, Se and Zn in the soils. Moreover, the author conducted evaluation for each individual heavy metals. The results show 8 kinds of heavy metal＇s levels exceed the standard requirements, more or less, among them, the primary heavy meal are identified to be V, Cd and Ni. Further comparison with background soils reveal that 9 kinds of heavy metals, Cd, Ni, As,Co,Cr, Hg, Mn,Pb and Se of studied areas present higher than background value, with Cd, Hg and Mn appear to be most significant. Finally, the author conducted soil ecological risks assessment by Hakanson methods and concluded that the Hg and Cd in studied areas soils present low ecological risks.

关 键 词：成都平原西部 农业土壤 金属元素 分布 

分 类 号：X833[环境科学与工程—环境工程]