【摘要】 采用单因子污染指数法、TCLP法和内梅罗综合指数法对江西省某铜矿冶炼厂周边土壤重金属(As、Pb、Zn、Cu、Ni)进行生态风险评价.结果表明,土壤重金属As、Pb、Zn、Cu、Ni的含量分别在7.45—60.35、34.16—272.71、41.96—384.27、25.44—1019.27、3.68—40.13 mg·kg-1之间.单因子污染指数法评价发现,Cu重污染区Cu、As污染比较严重,Cu轻污染区除了个别样点有Zn、As等轻度污染外,其他采样点均没有重金属污染.TCLP法提取As、Pb、Cu、Zn和Ni的含量分别在0.00—1.54、0.00—3.90、0.23—46.86、0.00—229.95、0.05—1.07 mg·kg-1之间.内梅罗综合污染指数法评价发现,在Cu重污染区,受到重金属中度及以上污染的土壤占50%,而在Cu轻污染区重金属比较轻微.另外,重金属总量、TCLP法提取重金属量与土壤pH值、CEC等存在着相关性.更多还原

【Abstract】 The ecological risk of heavy metals( As,Pb,Zn,Cu,Ni) in the surrounding soils of a copper smelting plant in Jiangxi Province was evaluated by Single Factor Index evaluation method,toxicity characteristic leaching procedure( TCLP) and Nemrow method. Results showed that the total contents of As,Pb,Zn,Cu and Ni were 7. 45—60. 35,34. 16—272. 71,41. 96—384. 27,25. 44—1019. 27 and 3. 68—40. 13 mg·kg-1respectively. The results of Single Factor Index evaluation method showed that the pollution of Cu and As was more serious in heavy polluted area,while there were not any pollution except Zn and As in some slightly polluted areas. The available levels of As,Pb,Cu,Zn and Ni extracted by TCLP were 0. 00—1. 54,0. 00—3. 90,0. 23—46. 86,0. 00—229. 95 and0. 05—1. 07 mg·kg-1. The pollution index based on Nemrow method showed that 50% of soil samples were in the level of medium and heavy pollution in high polluted area,while in light polluted area the pollution of heavy metals was slight. Moreover,the contents of available heavy metals extracted by TCLP and the total contents of heavy metals were correlated with some physicochemical properties of soil.更多还原