宝鸡市不同功能区灰尘重金属污染特征与评价  

CHARACTERISTICS AND ASSESSMENT OF HEAVY METALS IN DUST OF DIFFERENT FUNCTIONAL AREAS IN BAOJI,CHINA

作　　者：梁青芳 杨宁宁 高煜 张军[2] LIANG Qing-fang;YANG Ning-ning;GAO Yu;ZHANG Jun(Shanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,Baoji University of Arts and Sciences,Baoji 721013,China;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education,Chang'an University,Xi'an 710054,China)

机构地区：[1]陕西省灾害监测与机理模拟重点实验室(宝鸡文理学院),陕西宝鸡721013 [2]旱区地下水文与生态效应教育部重点实验室(长安大学),西安710064

出　　处：《环境工程》2019年第10期216-221,共6页Environmental Engineering

基　　金：旱区地下水文与生态效应教育部重点实验室项目(310829151140;310829151141);宝鸡市科技计划项目(2017JH2-25);陕西省地理学重点学科资助

摘　　要：采集宝鸡市不同功能区灰尘,用ICP-MS测定Pb、Zn、Cu、Cr、Ni、Co、Cd、As 8种重金属元素含量,采用生态风险指数法(RI)、污染负荷指数法(PLI)和GIS空间分析研究元素含量、污染水平及生态风险。结果表明:宝鸡市各功能区灰尘重金属含量水平总体偏高,Cd、Zn、Cu、As含量远超陕西省土壤背景值(1.30~34.79倍);工业区、交通区重金属含量明显高于其他功能区;不同功能区的RI值排序为交通区>工业区>文教区>住宅区>商业区,交通区和工业区RI值分别为698.96、680.01,生态风险达到很强级别;PLI值排序为工业区>交通区>文教区>商业区>住宅区,工业区和交通区处于中度污染水平,其余为轻度污染水平。宝鸡城区灰尘PLIzone为1.83,为轻度污染水平。RI值与PLI值的空间分布特征存在一致性,在任家湾火车站和市政府周围出现很强生态风险等级和中度污染水平。RI值在华城汽车产业园附近,PLI值在连天线东段也出现较高值。The contamination and ecological risk assessment in different functional areas dust of Baoji including Pb,Zn,Cu,Cr,Ni,Co,Cd,and As were analyzed by means of GIS analysis,the potential ecological risk index(RI)and pollution load index(PLI)respectively.It was found that the content of dust heavy metals especially Cd、Zn、Cu、As in all functional areas were several times higher than the background values of Shaanxi province(1.30~34.79).The heavy metal content in industrial area and traffic area were significantly higher than that in other functional areas.The order of RI values in different functional areas were industrial area,cultural and educational area,residential area and commercial area.The RI in traffic area and industrial area was 698.96 and 680.01,respectively.The PLI values were ranked as traffic area,cultural area,business area and residential area,while the industrial area and traffic area were at the moderate pollution level.The rest of the functional areas were at light pollution level.The dust PLIzone in Baoji was 1.83,which was at a slight pollution level.The spatial distribution characteristics of RI value and PLI value were consistent,and there was a strong ecological risk level and moderate pollution level around the municipal government and Renjiawan Railway Station.The higher value areas of RI and PLI also appeared in the areas near the Huacheng Automobile Industrial Park and the eastern section of Liantian Avenue respectively.

关 键 词：功能区 灰尘 重金属 生态风险 宝鸡市 

分 类 号：X53[环境科学与工程—环境工程]