Pollution characteristics of heavy metals in farmland soil on the southwest edge of Poyang Lake and its environmental evaluation
- 分享到:
摘要：
采集鄱阳湖西南边缘地带农田土壤,分析重金属Pb,Zn,As,Cr和Cu含量,探讨鄱阳湖边缘农田土壤重金属间的关系,评价其环境质量现状.重金属间相关性分析表明,鄱阳湖边缘农田土壤重金属具有不同的源属性,Pb和Zn相关系数为0.960,具有良好的相关性,以异地源为主,由流域内赣江水系携带进入土壤;而As,Cu和Cr之间相关性系数分别为0.690、0.640和0.850,具有相关性,以原地源为主,由当地农业活动进入土壤.单因子指数显示,研究区重金属元素Pb,Zn,As,Cr和Cu质量含量超背景值比例分别为25%、50%、25%、17%、58%,显示明显的人类活动影响.Cu,Zn和As的内梅罗综合指数分别为1.52、1.09和1.08,属轻度污染,Pb和Cr为0.76和0.85,达到警戒水平,研究区内梅罗综合指数为1.31,显示轻度污染,综合潜在生态风险指数RI值为21.25,为轻微危害等级.
On basis of the contents of Pb,Zn,As,Cr and Cu in the farmland soil collected on the southwest edge of Poyang Lake,the relationship between heavy metals in the farmland soil of Poyang Lake margin was discussed and the environmental quality status was also evaluated.The correlation analysis shows that the heavy metals of the farmland have different sources and that the correlation coefficient of Pb and Zn is 0.960.It reveals that the heavy metals are probably derived from other places of the Ganjiang River.The correlation coefficients between As,Cu and Cr are 0.690,0.640 and 0.850,respectively,it implies in-situ sources where heavy metals were from local agricultural pollution.The single factor index shows that their metal contents are greater than background value,the proportions of samples whose Pb,Zn,As,Cr and Cu are 25%,50%,25%,17%and 58%respectively,which indicates the significant human activities.The Nemerow composite index of Cu,Zn and As are 1.52,1.09 and 1.08 respectively,showing a mild pollution in Poyang Lake,while the Pb and Cr are 0.76 and 0.85,which is over the warning levels.The Nemerow composite index of the study area is 1.31,indicating a mild pollution,and the R I value of the comprehensive potential ecological risk index being 21.25,which reaches the minor hazard level.
作者：
刘佳伟 杨明生 段磊光 冯斐
Liu Jiawei;Yang Mingsheng;Duan Leiguang;Feng Fei(School of Resources Environmental&Chemical Engineering,Nanchang University,Nanchang 330031,China;Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,Nanchang University,Nanchang 330031,China)
机构地区：
南昌大学资源环境与化工学院 南昌大学鄱阳湖环境与资源利用教育部重点实验室
出处：
《betway官方app 学报：自然科学版》 CAS 北大核心 2021年第3期66-71,共6页
基金：
国家自然科学基金(41561045)。
关键词：
鄱阳湖边缘 农田土壤 重金属
edge of Poyang Lake farmland soil heavy metals
分类号：
X53 [环境科学与工程—环境工程]
