Determination of anthropogenic and biogenic compounds on atmospheric aerosol collected in urban, biomass burning and forest areas in São Paulo, Brazil.
Determination of anthropogenic and biogenic compounds on atmospheric aerosol collected in urban, biomass burning and forest areas in São Paulo, Brazil.
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DOI：
10.1016/j.scitotenv.2010.08.012
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
P. Vasconcellos;Davi Z. Souza;O. Sánchez-Ccoyllo;J. Bustillos;Helena Lee;F. Santos;K. H. Nascimento;Maria P Araújo;K. Saarnio;K. Teinilä;R. Hillamo
中科院分区：
文献类型：
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作者：
P. Vasconcellos;Davi Z. Souza;O. Sánchez-Ccoyllo;J. Bustillos;Helena Lee;F. Santos;K. H. Nascimento;Maria P Araújo;K. Saarnio;K. Teinilä;R. Hillamo
这项研究是在圣保罗州的三个不同特征的地点进行的：圣保罗（SPA），皮拉西卡巴（PRB）和马塔桑蒂卡森林（MAT）。PM10，正构烷烃，降植烷和植烷，多环芳烃，水溶性离子和生物质燃烧示踪剂，如左旋葡聚糖和retene，在石英纤维过滤器进行了测定。2007年5月8日至8月8日在MAT中心采样; 2007年8月15日至29日和2008年11月10日至29日在PRB中心采样; 2007年3月13日至4月4日和2008年8月7日至29日在SPA中心采样。生物源性释放的脂肪族化合物在城市站点比在森林站点少，其分布表现出热带维管植物的影响。来自生物质燃烧区域的空气质量输送可能会影响具有特定分子标记的地点。所有物种的浓度是可变的，并依赖于季节变化。在最干燥和污染的季节，正构烷烃和阳离子的总浓度之间的特大城市和生物质燃烧的网站是相似的。多环芳烃和无机离子丰度在圣保罗高于皮拉西卡巴，然而，该网站的生物质燃烧的影响似乎是最受影响的大气中的有机阴离子丰度。降植烷和植烷证实了城市地区石油残留物的污染;在MAT地区，生物活动和污染物的远距离迁移可能会影响降植烷的水平。
This study was conducted at three sites of different characteristics in São Paulo State: São Paulo (SPA), Piracicaba (PRB) and Mata Atlântica Forest (MAT). PM10, n-alkanes, pristane and phytane, PAHs, water-soluble ions and biomass burning tracers like levoglucosan and retene, were determined in quartz fiber filters. Samplings occurred on May 8th to August 8th, 2007 at the MAT site; on August 15th to 29th in 2007 and November 10th to 29th in 2008 at the PRB site and, March 13th to April 4th in 2007 and August 7th to 29th in 2008 at the SPA site. Aliphatic compounds emitted biogenically were less abundant at the urban sites than at the forest site, and its distribution showed the influence of tropical vascular plants. Air mass transport from biomass burning regions is likely to impact the sites with specific molecular markers. The concentrations of all species were variable and dependent of seasonal changes. In the most dry and polluted seasons, n-alkane and cation total concentrations were similar between the megacity and the biomass burning site. PAHs and inorganic ion abundances were higher at São Paulo than Piracicaba, yet, the site influenced by biomass burning seems to be the most impacted by the organic anion abundance in the atmosphere. Pristane and phytane confirm the contamination by petroleum residues at urban sites; at the MAT site, biological activity and long range transport of pollutants might influence the levels of pristane.