燃煤排放可吸入颗粒物中微量元素的分布特征

侯聪1 邵龙义1 王静2 刘君霞3 赵承美1 耿春梅2

(1.中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083)
(2.中国环境科学研究院, 北京 100012)
(3.中国循环经济协会, 北京 100037)

【摘要】燃煤排放被认为是大气颗粒物的主要来源之一,通过燃烧—稀释系统对采自织金、大同、东胜、银川、京西等地区的煤进行燃烧实验,采用ICP-MS(电感耦合等离子体质谱)研究燃煤排放的颗粒物中微量元素分布特征。结果表明,燃煤排放颗粒物主要富集Zn,Fe,Rb,Pb,Cu,Cr,Ti,Mn,Ba,Ni,As等微量元素,在颗粒物的水溶性组分中主要富集Zn,Rb,Pb,Cu,Ti,As,Ni等微量元素。微量元素Cs,Rb,Cd,Tl,Sb,Zn的水溶态组分在对应的微量元素总量中占比较高,说明这些元素主要以水可溶态的形式存在于燃煤排放的大气颗粒物中,而Fe在水溶组分中没有检测到,说明Fe主要以水不溶态存在于燃煤排放的大气颗粒物中。燃煤排放的颗粒物中的稀土元素以Sc,Ce,Nd,La为主。5种不同的煤燃烧排放PM10中微量元素的总量表现为:银川煤>织金煤>京西煤>大同煤>东胜煤,其中银川煤和京西煤燃烧排放PM10中微量元素总量较高的原因主要与其原煤的灰分含量较高有关,而织金煤燃烧排放PM10中微量元素的总量较高,主要与其原煤中的硫分较高有关。

【关键词】 燃煤排放; 可吸入颗粒物; 微量元素; 分布特征; ICP—MS;

【DOI】

【基金资助】 国家重点基础研究发展计划(973)资助项目(2013CB228503) 国家自然科学基金重大国际合作资助项目(41571130031)

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ISSN:0253-9993

CN: 11-2190/TD

Vol 41, No. 03, Pages 760-768

March 2016

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摘要

  • 1采样与实验
  • 2结果与分析
  • 3结论
  • 参考文献