【摘要】 为了解鄱阳湖生态经济区主要人口集中区土壤中重金属污染分布,对南昌、鹰潭、景德镇、九江市的主城区土壤样品中8种重金属Cu,Zn,Pb,Cd,Cr,Ni,Hg,As进行分析测定,采用Nemerow综合污染指数法和Hakanson潜在生态危害指数法探讨重金属污染特征和生态风险。研究结果表明:①土壤中八种重金属均受到不同程度的人为影响,鹰潭市土壤重金属受人为影响相对较大,九江市相对较小;②Nemerow综合污染指数结果显示,鄱阳湖生态经济区的污染指数P_综为1.673,表明区域内存在轻度重金属污染,污染程度较低,环境质量较好;③Hakanson潜在生态危害指数法结果表明该区域除Cd的环境风险指数为中等外,其余元素均为轻微,综合潜在生态风险评价结果为轻微,几乎不存在生态风险。研究区域的土壤重金属污染程度整体较轻,生态风险低,生态环境较好,可较好地容纳人类的发展活动。更多还原

【Abstract】 Cu,Zn,Pb,Cd,Cr,Ni,Hg,As in soils were analysed to improve the understanding of the soil pollution in the main population centers of Poyang River Ecological Economical Zone.The Nemerow integrated pollution index and the Hakanson potential ecological risk index were used to study the pollution and ecological risk of heavy metals.The results showed:① Human being’s activities at different degrees affected heavy metals in soils,and heavy metals in soils of Yingtan city gained relatively more effects of human being,while those of Jiujiang gained less.② The Nemerow integrated pollution index(P_综=1.673) of studied area indicated a good environmental situation with low pollution.③ The Hakanson index indicated Cd had medium ecological risk in studied area,while others had mild ecological risk,and the integrated ecological risk of the whole studied area was mild,which meant barely risk existence.The pollution of heavy metals in soils of studied area was low,ecological risk was low,and the environment was good enough to contain human being’s developing activities.更多还原