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株洲典型功能区土壤重金属污染及其生态风险
引用本文:姜苹红,马超,向仁军,成应向,彭克俭,刘湛. 株洲典型功能区土壤重金属污染及其生态风险[J]. 环境科学与技术, 2012, 0(Z1): 379-384
作者姓名:姜苹红  马超  向仁军  成应向  彭克俭  刘湛
作者单位:湖南省环境保护科学研究院
基金项目:国家水体污染控制与治理科技重大专项资助(2009ZX07210-001-07-02)
摘    要:
该研究采集株洲典型城市功能区工业区和农林综合利用区的农用土样,对土壤中Pb、Cd、Hg、As进行分析,采用内梅罗指数法和多指标生态评价法评价了土壤的污染状况和生态风险,结果表明:工业区周边农用土壤的污染程度显著高于农林综合利用区,不同功能区的污染特征极为相似,即:均以Cd和Hg为主要污染物,内梅罗指数评价为重度污染,As为轻度污染,且耕地的污染程度显著高于林地,工业区周边79%的耕地样点、71%的林地样点,农林综合利用区54%的耕地样点、43%的林地样点,内梅罗综合污染指数值大于6,复合污染严重,达强生态危害。含重金属废水灌溉以及Pb,Cd气型污染物的迁移沉降是土壤重金属富集的主要途径。文章就菜地和稻田土壤的生态危害,提出生态风险防范措施。

关 键 词:重金属  复合污染  生态风险  功能区  农用土地

Heavy Metal Pollution and Ecological Risk Assessment of Soil in Typical Function Zones of Zhuzhou
JIANG Ping-hong,MA Chao,XIANG Ren-jun,CHENG Ying-xiang,PENG Ke-jian,LIU Zhan. Heavy Metal Pollution and Ecological Risk Assessment of Soil in Typical Function Zones of Zhuzhou[J]. Environmental Science and Technology, 2012, 0(Z1): 379-384
Authors:JIANG Ping-hong  MA Chao  XIANG Ren-jun  CHENG Ying-xiang  PENG Ke-jian  LIU Zhan
Affiliation:(Hunan Research Academy of Environmental Sciences,Changsha 410018,China)
Abstract:
This study comprehensively collected agricultural soil sample of typical urban function zones,i.e.industrial area and agriculture-forestry integrated functional area,and made analyses of the pollution of Pb,Cd,Hg and As.This study applied Hankanson index of ecological risk to evaluate the pollution and the risk of heavy metal.The results were as follows: the pollution of the industrial area was more serious than agriculture-forestry integrated functional area,furthermore,the pollution patterns of the two districts showed a great many similarities,i.e.Cd and Hg were the primary pollutants which were belonging to severely polluted grade,As was belonging to slightly polluted grade.The pollution extent of the cultivated land was more serious than the forest land.79% of the cultivated land and 71% of the forest land in the industrial area,54% of the cultivated land and 43% of the forest land in the agriculture-forestry integrated functional area,where the value of the compound indices were more than 6,which were belonging to severely polluted and indicated critical ecological risk.Irrigation by industrial waste water contained heavy metal and sedimentation of gaseous Pb,Cd were the main factors causing the enrichment of heavy metal in soil.Finally,this study recommended how to defend against the ecological risk of heavy metal pollution in the cultivated land.
Keywords:heavy metal  compound pollution  ecological risk  function zone  agricultural land
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