湘江中下游农田土壤和蔬菜的重金属污染(英文)

编号 zgly0001586845

文献类型 期刊论文

文献题名 湘江中下游农田土壤和蔬菜的重金属污染(英文)

作者 王莉霞  郭朝晖  肖细元  陈同斌  廖晓勇  宋杰  武斌 

作者单位 CenterforEnvironmentalRemediationInstituteofGeographicSciencesandNaturalResourcesResearchCAS  GraduateUniversityofChineseAcademyofSciences  Beijing100049  China  InstituteofEnvironmentalEngineering  SchoolofMetallurgicalSciencean 

母体文献 Journal of Geographical Sciences 

年卷期 2008年03期

年份 2008 

分类号 X53 

关键词 XiangjiangRiver  agriculturalsoil  vegetable  heavymetal  pollution 

文摘内容 A total of 219 agricultural soil and 48 vegetable samples were collected from the midstream and downstream of the Xiangjiang River(the Hengyang-Changsha section)in Hunan Province.The accumulation characteristics,spatial distribution and potential risk of heavy metals in the agricultural soils and vegetables were depicted.There are higher accumulations of heavy metals such as As,Cd,Cu,Ni,Pb and Zn in agricultural soils,and the contents of Cd(2.44 mg kg -1 ),Pb(65.00 mg kg -1 )and Zn(144.13 mg kg -1 )are 7.97,3.69 and 1.63 times the corresponding background contents in soils of Hunan Province,respectively. 13.2%of As,68.5%of Cd,2.7%of Cu,2.7%of Ni,8.7%of Pb and 15.1%of Zn in soil samples from the investigated sites exceeded the maximum allowable heavy metal contents in the China Environmental Quality Standard for Soils(GB15618-1995,Grade II).The pollution characteristics of multi-metals in soils are mainly due to Cd.The contents of As,Cd,Cu,Pb and Zn in vegetable soils are significantly higher than the contents in paddy soils.95.8%, 68.8%,10.4%and 95.8%of vegetable samples exceeded the Maximum Levels of Contaminants in Foods(GB2762-2005)for As,Cd,Ni and Pb concentrations,respectively.There are significantly positive correlations between the concentrations of Cd,Pb and Zn in vegetables and the concentrations in the corresponding vegetable soils(p<0.01).It is very necessary to focus on the potential risk of heavy metals for food safety and human health in agricultural soils and vegetables in the midstream and downstream of the Xiangjiang River,Hunan Province of China.