文献类型：期刊文献

中文题名：新乡市郊区蔬菜基地土壤中重金属的形态分布特征及污染评价

英文题名：Pollution Assessment and Bioavailability Assessment of Heavy Metal in Soils of a Vegetable Production Base in the Xinxiang City Based on its Chemical Fractionation

作者：王晓钰[1,2]

第一作者：王晓钰

机构：[1]新乡学院化学与化工学院;[2]湖南大学环境科学与工程学院

第一机构：新乡学院化学化工学院

年份：2012

卷号：40

期号：4

起止页码：180-182

中文期刊名：河南师范大学学报：自然科学版

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2011_2012】；

语种：中文

中文关键词：土壤;地累积指数;重金属化学形态;生物可利用性

外文关键词：heavy metals in soil; index of geo-aecumulation; heavy metal chemical fractionation; bioavailability

摘要：基于对新乡市郊区蔬菜基地土壤的采样分析,借助地累积指数法、风险评估指数(Risk AsssessmentCode,RAC),分析研究了该土壤中重金属的富集污染程度和其潜在的生物可利用性.结果表明:研究区域土壤中重金属Cd与Ni明显超出了国家土壤环境质量三级标准的限值(GB15618-1995),重金属Cu与Zn在国家土壤环境质量三级标准的限值以内,重金属Cr则在国家土壤环境质量二级标准的限值以内;地累积评价结果表明土壤中各重金属的富集污染程度由高到低排序为:Cd,Ni,Zn,Cu和Cr;RAC评价结果表明土壤几种重金属对环境的风险程度由高到低依次为:Cd,Zn,Cu,Ni,Cr,其中Cd与Zn的环境风险较高,成为该区域土壤的主要环境风险控制因子.
Contents and chemical fractionation of heavy metals in the soil of a vegetable production base in xinxiang city were researched. On the basis of index of geo-accumulation and risk assessment code （RAC）, the enrichment pollution degree and bioavailability of heavy metals were assessed. The results showed that the gross concentration of Cr were lower than the second class limit value of the nation soil quality standard（GB15618-1995）, the gross concentrations of Cu and Zn were lower than the third class limit value of the nation soil quality standard, by contrast, the gross concentrations of Cd,Ni exceeded the third class limit value of the nation soil quality standard obviously. The results of index of geo-accumulation showed that their enrichment pollution degree were in the order Cd〉Ni〉 Zn〉Cu〉Cr. The results of RAC assessment showed that their bioavailability were in the order Cd 〉 Zn 〉 Cu 〉 Ni 〉 Cr, and Cd and Zn would be the primary pollution controlling factors in study area of the Xinxiang city.