郑州大学学报（医学版）2016，Vol.51Issue(6)：718-722,5.DOI:10.13705/j.issn.1671-6825.2016.06.008
气型污染农田土壤中重金属含量及潜在生态风险评价
Pollution and potential ecological risk assessment of heavy metals in agri-cultural soils of gas-type pollution
摘要
Abstract
Aim:To evaluate the pollution and potential ecological risk of heavy metals caused by industrial waste gas deposition of agricultural soils near a factory in Henan .Methods:Seven agricultural observation areas (G1-G7) were se-lected among different distances from 741 to 2 556 m on the west side of the factory ( the area perennial dominant wind di-rection leeward ) , and twenty-eight mixed soil samples were collected in four seasons .The concentrations of heavy metals in agricultural soils(Hg, As, Pb, Cd, Cu, Zn, Ni, and Cr) were detected.Single cumulative index method , Nemerow index method and Hakanson potential ecological risk index method were used to assess the accumulation of heavy metals and po -tential ecological risk of the farmland .Results:Contents of seven kinds of heavy metals except for Cr in 28 soil samples exceeded the corresponding background values in Henan Province , also, the mean contents of Cd and Pb compared with Soil Environmental Quality Standard were 6.08 and 0.07 times, respectively .Contents of six kinds of heavy metals except for Cr and Ni in observation area G 1 and G2 were higher than other observation areas , and the concentrations of As , Hg, Cu, and Zn in G3 area were higher than those in G6 and G7 areas(P<0.05).Single cumulative indexes of Cd , Pb and Hg ranged from 8.15 to 342.69, and reached up to most severe level .Nemerow indexes of seven different observation areas were also most severe(between 731.13 and 30 588.88).The total potential ecological risk (1 620.29-14 659.37) of sev-en observation areas was extremely severe .Conclusion:The concentrations of Cd , Pb, and Hg in gas-type polluted agri-cultural soils reach up to severe accumulation and have an extremely severe ecological risk .关键词
气型污染/农田土壤/重金属/镉/潜在生态危害指数Key words
gas-type pollution/agricultural soil/heavy metal/cadmium/potential ecological risk index分类
医药卫生引用本文复制引用
李庆波,赵小学,李红萍,程学敏,刘佳,丁记者,朱静媛,成永霞..气型污染农田土壤中重金属含量及潜在生态风险评价[J].郑州大学学报（医学版）,2016,51(6):718-722,5.基金项目
国家自然科学基金青年基金项目81202174 （）
