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生态学杂志 ›› 2011, Vol. 30 ›› Issue (05): 902-906.

• 汞的生物地球化学专辑 • 上一篇    下一篇

贵州万山汞矿区自然土壤汞污染特征

戴智慧1,2,冯新斌1**,李平1,仇广乐1,商立海1   

  1. 1中国科学院地球化学研究所 环境地球化学国家重点实验室| 贵阳 550002;2中国科学院研究生院| 北京 100049
  • 出版日期:2011-05-08 发布日期:2011-05-08

Mercury pollution in natural soil collected from Wanshan mercury mining area, Guizhou Province.

DAI Zhi-hui1,2, FENG Xin-bin1**, LI Ping1, QIU Guang-le1, SHANG Li-hai1   

  1. 1State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China|2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Online:2011-05-08 Published:2011-05-08

摘要: 为阐明万山汞矿区自然土壤汞的污染情况,以汞矿开采冶炼区为起点,沿敖寨河和下溪河等间距(4 km)分层采集0~30 cm厚度的河滩土、灌木土和林地土,测定了其汞含量,分析了自然土壤汞的空间分布特征。结果表明,矿区同种植被覆盖类型的土壤总汞的含量变化范围较大,河滩土为0.16~389 mg·kg-1、灌木土为0.09~312 mg·kg-1、林地土为0.05~299 mg·kg-1,空间分布特征表现为随距污染源距离的增加而降低;同一采样区内河滩土、灌木土、林地土中土壤总汞的含量依次降低,同一采样点的垂向剖面上总汞含量一般从表层向下依次降低。

关键词: 地膜覆盖, 春小麦, 土壤温度, 土壤水分, 产量, 半干旱地区

Abstract: To clarify the distribution of mercury pollution in the natural soil in Wanshan mercury (Hg) mining area, total mercury (THg) concentrations were measured in 0-30 cm soil layers of alluvial soil, shrub soil and forest soil along the Aozhai river and Xiaxi river with a interval of 4 km. THg concentrations in the same vegetation cover area varied in a wide range (alluvial soil was 0.16-389 mg·kg-1, shrub soil was 0.09-312 mg·kg-1 and forest soil was 0.05-299 mg·kg-1), and spatial distribution of THg indicated that THg in natural soil decreased with increasing distance from the Hg mining area. Moreover, THg concentrations decreased from alluvial soil, shrub soil to forest soil in a sample site, and they decreased with increasing depth in soil profiles.

Key words: Plastic film mulching, Spring wheat, Soil temperature, Soil moisture, Yield, Semiarid area