Chemical composition of atmospheric particulate matter soluble fraction and meteorological variables in São Paulo state, Brazil
Chemical composition of atmospheric particulate matter soluble fraction and meteorological variables in São Paulo state, Brazil
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DOI：
10.1590/s0102-77862011000300008
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发表时间：
2011-09-01
影响因子：
--
通讯作者：
Melfi, Adolpho José
中科院分区：
文献类型：
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作者：
Bourotte, Christine Laure Marie;Sanchéz-Ccoyllo, Odon Roman;Melfi, Adolpho José
这项工作的目的是表征和比较PM10可溶性部分的化学成分与气象变量，如风向和空气质量的后向轨迹。1999年冬季收集的PM10在两个对比的网站：圣保罗市和国家公园的塞拉做马尔（库尼亚）内的大西洋森林保护区。通过离子色谱法分析PM10的水提取物中的主要离子（Na+、K+、Mg 2+、Ca 2+、NH 4+、Cl-、NO3-、SO 42-），并通过电感耦合等离子体质谱法（ICP-MS）分析微量元素（Al、Mn、Fe、Pb、Zn等）。在圣保罗，主要化学形态为SO 42-、NO3-、NH 4+、Zn、Fe、Al、Ba、Cu、Pb、Mn和Ni，而在库尼亚，主要化学形态为Na+、K+、Cl-、SO 42-、Zn和Ni。采样期间与风向相关的化学成分反映了土壤占用和人类活动的短期影响。
The objective of this work was to characterize and compare the chemical composition of the PM10 soluble fraction in relation to meteorological variables such as wind direction and air masses backward trajectories. The PM10 was collected during winter of 1999 in two contrasting sites: the Sao Paulo city and the State Park of Serra do Mar (Cunha) inside the Atlantic Forest Reserve. The aqueous extracts of PM10 were analyzed by Ion Chromatography for major ions (Na+, K+, Mg2+, Ca2+, NH4+, Cl-, NO3-, SO42-) and by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) for trace elements (Al, Mn, Fe, Pb, Zn, etc.). In Sao Paulo, the dominant chemical species were SO42-, NO3-, NH4+, Zn, Fe, Al, Ba, Cu, Pb, Mn and Ni while in Cunha, Na+, K+, Cl-, SO42-, Zn and Ni were dominant. The chemical composition related to the wind direction during sampling reflected short-range influence due to soil occupation and anthropic activities.