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北京交通环境PM10分布特征及重金属形态分析

钱 枫 杨仪方 张慧峰

钱 枫, 杨仪方, 张慧峰. 北京交通环境PM10分布特征及重金属形态分析[J]. 环境科学研究, 2011, 24(6): 608-614.
引用本文: 钱 枫, 杨仪方, 张慧峰. 北京交通环境PM10分布特征及重金属形态分析[J]. 环境科学研究, 2011, 24(6): 608-614.
QIAN Feng, YANG Yi-fang, ZHANG Hui-feng. Distribution Characteristics and Speciation of Heavy Metals in PM10 near Urban Roads and Surrounding Areas of Beijing[J]. Research of Environmental Sciences, 2011, 24(6): 608-614.
Citation: QIAN Feng, YANG Yi-fang, ZHANG Hui-feng. Distribution Characteristics and Speciation of Heavy Metals in PM10 near Urban Roads and Surrounding Areas of Beijing[J]. Research of Environmental Sciences, 2011, 24(6): 608-614.

北京交通环境PM10分布特征及重金属形态分析

基金项目: 北京市重点学科建设项目; 2007—2009北京市属高等学校人才强教计划项目

Distribution Characteristics and Speciation of Heavy Metals in PM10 near Urban Roads and Surrounding Areas of Beijing

  • 摘要: 以北京市西三环航天桥地区为对象,研究了城市交通环境大气可吸入颗粒物浓度及主要化学组成随时间和粒径的分布特征. 结果表明:该地区大气中ρ(PM10)冬季略高于春季,秋季次之,夏季最低;颗粒物中ρ(PM2.5)/ρ(PM10)和ρ(PM1.0)/ρ(PM10)平均值分别为82.6%和70.3%;ρ(PM10)与ρ(PM2.5)和ρ(PM10)与ρ(PM1.0)之间均有显著的相关性. PM10中金属元素浓度冬春季较高,夏秋季较低;Mg,Ca和Fe等地壳元素浓度随粒径的减小而降低,而Pb,Zn和Ni等重金属元素浓度总体上随粒径的减小而增加. 颗粒物中的Cr和Ni主要以有机物结合态存在,Cu,Zn和Cd主要以酸可提取态存在,Pb主要以酸可提取态和氧化物结合态存在;颗粒物中所含Cd和Zn元素的生物有效性最高. PM10中水溶性ρ(SO42-)在夏季和冬季最高,秋季最低,而水溶性ρ(NO3->/sup>)全年变化不大;[0.43~2.1 μm)粒径段颗粒物中的水溶性ρ(SO42-)及ρ(NO3->/sup>)较高,分别占PM10中水溶性ρ(SO42-)及ρ(NO3->/sup>)总量的68.3%及57.6%;ρ(NO3->/sup>)/ρ(SO42-)平均值为0.659.

     

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出版历程
  • 收稿日期:  2011-01-09
  • 修回日期:  2011-03-12
  • 刊出日期:  2011-06-25

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