南昌地区不同企业周边重金属分布及影响规律  

Impact of enterprises in adjacent area of Nanchang on the distribution of heavy metals

作　　者：丁园[1,2] 钟桂芳[2] 刘燕红[2] 宗良纲[1] 

机构地区：[1]南京农业大学资环学院,江苏南京210095 [2]南昌航空大学环化学院,江西南昌330063

出　　处：《生态环境学报》2009年第5期1783-1787,共5页Ecology and Environmental Sciences

基　　金：国家自然科学基金项目(20807021);江西省科技厅社会发展项目;江西省教育厅青年基金项目(GJJ09489);南昌市科技局社会发展项目(0700151)

摘　　要：结合GIS技术和主成分分析方法,综合评价南昌地区钢铁、化工、电镀和塑料4种类型6个不同企业周边红壤-蔬菜系统的环境质量。结果表明,4种元素的污染程度依次为:Cd>Cu>Zn>Pb,其中Pb含量未超过土壤环境质量二级标准。重金属Cd、Zn和Cu具有良好的同源性,其分布均呈辐射状,从南到北逐渐降低,东南方向的电镀厂和钢铁厂2周边区域为最高浓度区。企业周边蔬菜地中白菜(Brassica chinensis)未受Pb污染,Cu、Zn和Cd已在白菜体内达到了一定程度的积累。白菜中重金属与土壤中对应重金属全量极显著相关。说明蔬菜中重金属主要来源于表层土壤中所积累的重金属。Using GIS（Geographic Information System）and PCA （principal component analysis） methods,we assessed the environmental quality of red soil-vegetable system in the adjacent area of Nanchang. Soil and vegetable samples were taken from the sites around six enterprises including iron and steel,chemical industry,electroplating and plastic manufactory in this area. Analysis of soil samples indicated that the concentration of heavy metals was Cd〉Cu〉Zn〉Pb,and Pb was lower than the second grade of Standards for Soil Environmental Quality of China （GB 15618-1995）. There was a spatial homology in the distribution of Cd,Zn and Cu. The highest concentration of these heavy metals among different sites was observed in the southeast area where manufactories of electroplating and iron and steel are located,and the concentration of heavy metals decreased northward. The concentrations of Cd,Zn and Cu in pakchoi （Brassica chinensis） were higher but that of Pb was lower than the Hygienic Standards for food security of P.R. China. A further investigation indicated that the concentrations of heavy metals between soil and vegetable samples were significantly correlated,suggesting that the heavy metal in pakchoi was most likely from the soils.

关 键 词：重金属 蔬菜地 污染调查 污染评价 空间分布 

分 类 号：X53[环境科学与工程—环境工程]