A Comparative Study of Chemical Databases for Fine Particle Chinese Aerosols
A Comparative Study of Chemical Databases for Fine Particle Chinese Aerosols
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DOI：
10.1021/es001147t
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发表时间：
2000-10
影响因子：
11.4
通讯作者：
Zhiqun Zhang;S. Friedlander
中科院分区：
文献类型：
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作者：
Zhiqun Zhang;S. Friedlander
已为中国多个采样点建立了PM2.5和PM2.0气溶胶化学数据库。1980年至1993年抽样的主要城市地点包括北京、天津、武汉、兰州和广州。测定了13 ~ 22种无机化学元素，但很少有次生和有机化合物。简要总结了以往的源分辨率研究。北京气溶胶的质量平衡表明，三个最大的组成部分是含碳物质（约50%），（NH 4）2SO 4（约18%），和硅化合物（约12%表示为二氧化硅）。北京和兰州的硅浓度是洛杉矶的26 - 36倍。细硅可能来自燃煤、地壳源和稻草燃烧，但相对量不确定。利用散点图对中国城市的质量浓度数据进行了比较，并与洛杉矶市中心的数据进行了比较。北京气溶胶的成分普遍高于洛杉矶; 1992年北京PM2.0的质量比1993年的高。
A chemical database for PM2.5 and PM2.0 aerosols has been assembled for various sampling sites in China. The primarily urban sites, sampled from 1980 to 1993, include Beijing, Tianjin, Wuhan, Lanzhou, and Guangzhou. From 13 to 22 inorganic chemical elements were measured but few secondary and organic compounds. Previous source resolution studies are briefly summarized. A mass balance for the Beijing aerosol indicates that the three largest components are carbon-containing matter (∼50%), (NH4)2SO4 (∼18%), and silicon compounds (∼12% expressed as silica). Silicon concentrations in Beijing and Lanzhou were 26−36 times higher than Los Angeles. The fine silicon probably comes from coal combustion, crustal sources, and rice straw burning, but the relative amounts are not certain. Mass concentration data for Chinese cities were compared among themselves and with downtown Los Angeles using scatter diagrams. Compositions of the Beijing aerosol were generally higher than Los Angeles; the Beijing PM2.0 mass in 1992−...