摘要
采用野外采样和室内分析相结合的方法,以甘肃中部高原露地蔬菜代表类型的茄果类、叶菜类、鳞茎类、根茎类等蔬菜土壤为研究对象,以甘肃省环境监测中心站发布的土壤环境重金属背景值为主要评价参比值,分析土壤中重金属Cd、Hg、As、Cu、Pb和Cr的质量分数及污染特征,并采用地累积指数法和潜在生态危害指数法对研究区露地蔬菜土壤重金属污染现状进行生态风险评价。结果表明:研究区露地菜田土壤重金属的质量分数均高于评价参比值,重金属元素的潜在生态危害均属轻微,潜在生态危害程度顺序是Hg>Cd>Pb>Cu>Cr>As,对研究区域生态环境具有潜在影响的重金属元素主要是Hg。
The concentrations and pollution characteristics of six heavy metals,such as Hg,Cr,Cd,As,Pb and Cu,in the open vegetable fileds soil from solanaceous fruit vegetables,leafy vegetables,bulbs vegetables,roots and stems vegetables in the central plateau of Gansu Province were analyzed by using the method of field investigation and laboratory analyses.Geo-accumulation index and potential ecological risk index were used to evaluate the ecological risk assessment of heavy metal pollution.Our results showed that the concentrations of heavy metals in soil of open vegetable fields soil were higher than the evaluation of reference value.Those soils showed a light potential ecological risk,and the potential ecological risk was in the order of HgCdPbCuCrAs.Hg was the potential impact element for the ecological environment in the research area.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2013年第1期103-110,共8页
Journal of Agro-Environment Science
基金
财政部国家社会公益项目绿色农业科学研究示范项目(2007-04)
国家科技支撑项目"高原夏菜高效安全生产及保鲜加工关键技术研究与示范"(2007BAD52B01)
甘肃省科技重大专项(1102NKDJ031)
关键词
露地菜田土壤
重金属
生态风险评价
地积累指数
open vegetable fields soil
heavy metals
ecological risk assessment
geo-accumulation index
