华南理工大学学报(自然科学版) ›› 2005, Vol. 33 ›› Issue (1): 75-78.

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大气颗粒物中重金属的形态分析与迁移

吕玄文 陈春瑜 黄如枕 党志   

  1. 华南理工大学 化学科学学院,广东 广州 510640
  • 收稿日期:2004-04-16 出版日期:2005-01-25 发布日期:2005-01-25
  • 通信作者: 吕玄文(1969-),女,博士生,主要从事环境化学方面的研究 E-mail:ehxwlv@scut.edu.cn
  • 作者简介:吕玄文(1969-),女,博士生,主要从事环境化学方面的研究
  • 基金资助:

    广东省教育厅资助项目(B2124803)

Speciation Analysis and Transfer of Heavy Metals in Atmospheric Particulates

Lü Xuan-wen  Chen Chun-yu  Huang Ru-di  Dang Zhi   

  1. College of Chemical Science,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2004-04-16 Online:2005-01-25 Published:2005-01-25
  • Contact: 吕玄文(1969-),女,博士生,主要从事环境化学方面的研究 E-mail:ehxwlv@scut.edu.cn
  • About author:吕玄文(1969-),女,博士生,主要从事环境化学方面的研究
  • Supported by:

    广东省教育厅资助项目(B2124803)

摘要: 采用连续化学浸提萃取法,研究了广州市白云区大气颗粒物(TSP)样品在模拟酸雨和湖水条件下重金属元素Cu、Pb和Zn的形态迁移和变化.结果表明:大气颗粒物中Cu、Pb和Zn的总含量在模拟酸雨浸泡后大幅降低,但Cu和Pb的可交换态的量略有增加,Zn主要以残渣态存在;大气颗粒物经湖水浸泡后,Cu和Pb的总含量基本不变.Cu由残渣态向铁锰氧化物结合态及有机物结合态转化,Pb由可交换态转化为其他形态.Zn大部分以溶解态转移到湖水中.

关键词: 大气颗粒物, 重金属, 形态分析, 迁移

Abstract:

Under conditions of simulated acid rain and lake water,the speciation transfer and variation of the heavy metals Cu.Pb and Zn in the atmospheric particulates(TSP)sampled in Baiyun District of Guangzhou were investi· gated bv means of continuous chemistry extraction.The results indicate that the total contents of Cu,Pb and Zn greatly decrease after dipping in the simulated acid rain,while the amounts of extractable fraction of Cu and Pb in‘ crease little.Zn mainly appears as residual fraction.It is also shown that,after the treatment by lake water,the to· tal contents of Cu and Pb generally have no change,Cu transfers from residual fraction to Fe-Mn oxide and organic fraction.Pb transfers from extractable fraction to other fractions,and Zn mainly transfers to lake water with an ex-tractable fraction.

Key words: atmospheric particulate, heavy metal, speciation analysis, transfer