北京市农田土壤重金属的化学形态及其对生态系统的潜在危害
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

中国地质调查局《北京市平原区农田生态系统区域生态地球化学评价》(13100)项目资助


Chemical Forms of Heavy Metals in Soils and Potential Hazards to Ecosystem in Beijing Farmlands
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    选取北京市农田96件土壤样品,采用分级提取试验方法研究土壤中重金属元素Cd、Hg、Pb、As的化学形态。结果表明,Cd、Hg、Pb、As的含量远低于国家土壤环境质量二级标准(GB15618-1995);As、Hg、Pb主要以残渣态形式存在,Cd主要以离子交换态存在;As、Pb各形态的变异系数差异相对较小,Hg、Cd各形态的变异系数差异较大;元素总量和土壤有机质含量是影响元素地球化学形态的主要因素;Cd的迁移能力较强,容易被植物吸收,对土壤生态系统的潜在危害性较大。

    Abstract:

    In this paper, 96 soil samples in Beijing farmlands were studied for chemical forms of heavy metals of Cd, Hg, Pb and As by sequential extraction method. The results showed that total concentrations of Cd, Hg, Pb, and As were much lower than the corresponding limits of national standards. As, Hg and Pb were dominated by residual forms, while Cd in exchangeable forms. The variation coefficients of chemical forms of As and Pb were comparatively smaller, whereas, the variation coefficients of each chemical forms of Hg and Cd were comparatively larger. The total concentrations of heavy metals and soil organic matter content were the main factors that affect chemical forms of heavy metals. Cd was comparatively mobile and readily absorbed by plants. The potential hazard of Cd to farmland ecosystem was serious.

    参考文献
    相似文献
    引证文献
引用本文

丛 源,陈岳龙,杨忠芳,侯青叶,胡省英,郭 莉.北京市农田土壤重金属的化学形态及其对生态系统的潜在危害[J].土壤,2009,41(1):37-41. CONG Yuan, CHEN Yue-long, YANG Zhong-fang, HOU Qing-ye, HU Sheng-ying, GUO Li. Chemical Forms of Heavy Metals in Soils and Potential Hazards to Ecosystem in Beijing Farmlands[J]. Soils,2009,41(1):37-41

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期:
  • 出版日期: