高级搜索

应用化学提取法评价大气颗粒物中重金属的生物有效性

,  ,  ,  , 

downloadPDF

上一篇

下一篇

冯茜丹, 刘艳, 党志, 黄伟林, 吕玄文. 应用化学提取法评价大气颗粒物中重金属的生物有效性[J]. 环境工程学报, 2008, 2(2).
引用本文: 冯茜丹, 刘艳, 党志, 黄伟林, 吕玄文. 应用化学提取法评价大气颗粒物中重金属的生物有效性[J]. 环境工程学报, 2008, 2(2).
shu
Feng Xidan, Liu Yan, Dang Zhi, Huang Weilin, Lu Xuanwen. Application of chemical leaching tests to evaluate the bioavailability of heavy metals in atmospheric particles[J]. Chinese Journal of Environmental Engineering, 2008, 2(2).
Citation: Feng Xidan, Liu Yan, Dang Zhi, Huang Weilin, Lu Xuanwen. Application of chemical leaching tests to evaluate the bioavailability of heavy metals in atmospheric particles[J]. Chinese Journal of Environmental Engineering, 2008, 2(2).
shu

应用化学提取法评价大气颗粒物中重金属的生物有效性

  • 1.

    华南理工大学环境科学与工程学院，广州 510640

  • 2.

    罗格斯大学环境科学系，美国新泽西州,新布伦维克 08901-8551

  • 基金项目:

    广东省科技厅重大专项项目（2004A30308002）

  • 中图分类号: X131.1,X513

Application of chemical leaching tests to evaluate the bioavailability of heavy metals in atmospheric particles

  • 1.

    College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640

  • 2.

    Department of Environmental Sciences, Rutgers University, New Brunswick, New Jersey, 089018551, USA

  • Fund Project:

  • 摘要: 以广州市楼顶降尘为研究对象，在分析其粒度分布和重金属总量的基础上，采用单一化学提取法（DWLP、TCLP）和多级化学提取法（SEP）研究了大气颗粒物中4种重金属元素的生物有效性。结果表明：样品中96％以上颗粒小于100 μm，其中10μm和2.5 μm以下颗粒分别占33％和11％。大气颗粒物中重金属含量很高，Cu、Pb、Zn和Cd的平均含量分别为362.43、1 033.81、830.32和5.80 mg/kg，是广东省环境土壤背景值的17～64倍。单一提取法中，TCLP的提取效率明显高于DWLP，表明pH值是影响大气颗粒物中重金属释放的主要因素。SEP法结果显示，Zn和Cd 的生物可利用态比例远高于Cu和Pb。经DWLP和TCLP法提取后，颗粒物中重金属的总含量有不同程度的降低，生物可利用态所占比例明显增加。通过综合分析，发现SEP比其他两种方法更适用于评价大气颗粒物中重金属的生物有效性。
    Abstract: Particle samples used in this study were collected from a building roof of Guangzhou and analyzed for size distribution and total concentration of heavy metals. Three chemical leaching tests, including DWLP, TCLP and SEP, were employed to investigate the bioavailability of heavy metals in the particles. Results showed that, the percentage of particles less than 100 μm was 96%, while that less than 10 μm and 2.5 μm was 33% and 11%, respectively. The contents of heavy metals in particles were very high. The total concentration of Cu, Pb, Zn and Cd was 362.43, 1 033.81, 830.32 and 5.80 mg/kg respectively, which were 17～62 times higher than the value of the environmental soil background of Guangdong Province. Results of single chemical leaching procedures indicated that heavy metal concentrations in the TCLP leachate were significantly higher than that of the DWLP. This is mainly due to the pH differences between the applied extraction fluids. According to the data of the SEP, the bioavailability of Zn and Cd in the particles is much higher than that of Cu and Pb. The contents of heavy metals in particles were decreased in some degrees after DWLP and TCLP leaching tests, while the relative percentages of bioavailable part were significantly increased. Comparing results obtained from above three methods, it is found that the SEP method is more suitable to evaluate the bioavailability of heavy metals in atmospheric particles.
  • 加载中
  • 加载中
WeChat 点击查看大图
计量
  • 文章访问数:  2532
  • HTML全文浏览数:  1311
  • PDF下载数:  2332
  • 施引文献:  0
出版历程
  • 收稿日期:  2007-06-08
冯茜丹, 刘艳, 党志, 黄伟林, 吕玄文. 应用化学提取法评价大气颗粒物中重金属的生物有效性[J]. 环境工程学报, 2008, 2(2).
引用本文: 冯茜丹, 刘艳, 党志, 黄伟林, 吕玄文. 应用化学提取法评价大气颗粒物中重金属的生物有效性[J]. 环境工程学报, 2008, 2(2).
shu
Feng Xidan, Liu Yan, Dang Zhi, Huang Weilin, Lu Xuanwen. Application of chemical leaching tests to evaluate the bioavailability of heavy metals in atmospheric particles[J]. Chinese Journal of Environmental Engineering, 2008, 2(2).
Citation: Feng Xidan, Liu Yan, Dang Zhi, Huang Weilin, Lu Xuanwen. Application of chemical leaching tests to evaluate the bioavailability of heavy metals in atmospheric particles[J]. Chinese Journal of Environmental Engineering, 2008, 2(2).
shu

应用化学提取法评价大气颗粒物中重金属的生物有效性

  • 1.  华南理工大学环境科学与工程学院，广州 510640
  • 2. 罗格斯大学环境科学系，美国新泽西州,新布伦维克 08901-8551
  • 收稿日期:  2007-06-08
基金项目:

广东省科技厅重大专项项目（2004A30308002）

摘要: 以广州市楼顶降尘为研究对象，在分析其粒度分布和重金属总量的基础上，采用单一化学提取法（DWLP、TCLP）和多级化学提取法（SEP）研究了大气颗粒物中4种重金属元素的生物有效性。结果表明：样品中96％以上颗粒小于100 μm，其中10μm和2.5 μm以下颗粒分别占33％和11％。大气颗粒物中重金属含量很高，Cu、Pb、Zn和Cd的平均含量分别为362.43、1 033.81、830.32和5.80 mg/kg，是广东省环境土壤背景值的17～64倍。单一提取法中，TCLP的提取效率明显高于DWLP，表明pH值是影响大气颗粒物中重金属释放的主要因素。SEP法结果显示，Zn和Cd 的生物可利用态比例远高于Cu和Pb。经DWLP和TCLP法提取后，颗粒物中重金属的总含量有不同程度的降低，生物可利用态所占比例明显增加。通过综合分析，发现SEP比其他两种方法更适用于评价大气颗粒物中重金属的生物有效性。

English Abstract

    全文HTML

参考文献 (0)

返回顶部

目录

/

返回文章
返回

Copyright © 2019 中国科学院生态环境研究中心