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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (31): 237-241.doi: 10.11924/j.issn.1000-6850.casb15080032

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

闽西中堡银多金属矿区周边农田土壤剖面重金属分布及其评价

李融,陈炎辉,谢团辉,张松旺,王果   

  1. 福建省农业生态环境与能源技术推广总站,福建农林大学资源与环境学院,福建农林大学资源与环境学院,福建农林大学资源与环境学院,福建农林大学资源与环境学院
  • 收稿日期:2015-08-05 修回日期:2015-10-07 接受日期:2015-08-19 出版日期:2015-11-16 发布日期:2015-11-16
  • 通讯作者: 王果

Distribution and Evaluation of Heavy Metals in Soil Profiles in Agricultural Fields Around Zhongbao Silver Polymetallic Mining in Western Fujian

  • Received:2015-08-05 Revised:2015-10-07 Accepted:2015-08-19 Online:2015-11-16 Published:2015-11-16

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摘要： 为了探究银多金属矿区周边农田土壤剖面重金属的分布情况，以闽西中堡银多金属矿区周边农田土壤为研究对象，分析了土壤剖面中重金属Cu、Cd、Hg、Zn、Pb、Ni、As、Cr 的含量和垂直分布规律，并讨论了污染元素的来源。结果表明：该区土壤Cu、Cd、Hg、Zn、Pb的含量垂直向下规律呈下降趋势，其中Cu、Cd和Hg主要在表层富集，Pb 和Zn的表聚现象较弱。As和Cr 未呈现表层富集现象，其含量随深度增加呈增大趋势。Ni 含量在剖面中无太大变化。只有表层土壤Cu、Cd、Hg超标，其平均综合污染指数大于1，属于轻度Cu-Cd-Hg复合污染型。土壤Cu、Cd污染源主要来自于银多金属矿区活动，而Hg污染源与民间冶金有关。

关键词: Origin软件, Origin软件, 拟合, 热力学, 吸附

Abstract: The paper aims to study the distribution of heavy metals in soil profiles around silver polymetallic mining area, the contents and vertical distribution of Cu, Cd, Hg, Zn, Pb, Ni, As, Cr in 10 profiles of the agricultural fields near a silver polymetallic mining area in Zhongbao, the west of Fujian Province, were investigated. The origin of the heavy metals in the profiles was also discussed. The results showed that the contents of Cu, Cd, Hg, Zn and Pb in the soil declined with profile depth. Cu, Cd and Hg were apparently accumulated in surface layers while Pb and Zn were only slightly accumulated in the surface. On the contrary, As and Cr tended to increase with the increase of depth. Ni was evenly distributed in the profiles. The average contents of Cu, Cd and Hg in the surface layer were above the limits for acidic agricultural soils stipulated in China Environmental Quality Standards of Soil (GB 15618-1995) whereas those of the other heavy metals were below the limits. The comprehensive pollution index of the heavy metals in the surface soils was higher than 1,indicating that the surface soils suffered slight compound pollution. Cu and Cd were mainly originated from the mining activities of silver polymetallic mine while Hg was related to the folk metallurgy