Investigation of sources of atmospheric aerosol at urban and suburban residential areas in Thailand by positive matrix factorization
Investigation of sources of atmospheric aerosol at urban and suburban residential areas in Thailand by positive matrix factorization
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DOI：
10.1016/s1352-2310(99)00433-1
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发表时间：
2000-01-01
影响因子：
5
通讯作者：
Paatero, P
中科院分区：
文献类型：
--
作者：
Chueinta, W;Hopke, PK;Paatero, P
1995年6月至1996年5月在曼谷市区居民区和1993年9月至1994年8月在曼谷边界省巴吞他尼的郊区居民区采集了空气中细颗粒物和粗颗粒物的样本。通过仪器中子活化分析对样品进行了元素浓度分析。然后通过正矩阵因式分解和旋转对数据集进行分析，以确定这两个地区大气气溶胶的可能来源。最好的解决方案是市区细颗粒物和粗颗粒物的元素组成各有六个因素，郊区的细颗粒物和粗颗粒物各有五个因素。土壤是所有数据集确定的空气颗粒物的主要来源。机动车因素在城市中的浓度明显高于郊区。在市区内发现了一种高锌、高锰的摩托车因子。Na和Cl含量最高的因素是海盐，在城市大气中明显可见。该地点位于泰国湾以北35公里处，一年中的大部分时间都受到来自南部和西南部的风的影响。木炭/木头燃烧和焚烧因素可能是当地的污染源。钙浓度高的一个因素被归因于城市住宅区附近的一座建筑，以及郊区住宅区附近的两家石膏制造厂。(C)2000爱思唯尔科学有限公司。保留所有权利。
Samples of fine and coarse fractions of airborne particulate matter were collected in an urban residential area of metropolitan Bangkok from June 1995 to May 1996 and in a suburban residential area in Pathumthani, Bangkok's boundary province, from September 1993 to August 1994. The samples were analyzed for elemental concentrations by instrumental neutron activation analysis. The data sets were then analyzed by positive matrix factorization followed by rotation to identify the possible sources of atmospheric aerosols in both areas. The best solutions were found to be six factors for elemental compositions of each of the fine and coarse particulate matter fractions at the urban site and five factors each for both fine and coarse fractions at the suburban location. Soil was the major source of airborne particulate matter identified for all data sets. The motor vehicle factor showed much higher concentration for Br in urban than in suburban area. A motorcycle factor with high concentrations of Zn and Mn were found at the urban site. The factor containing highest concentrations of Na and Cl was attributed to sea-salt and was clearly seen in the urban atmosphere. The site was located 35 km to the north from the Gulf of Thailand and was influenced by wind from the south and southwest for most of the year. Charcoal/wood burning and incineration factors were likely to be the local sources. A factor with high concentration of Ca was attributed to a construction near the urban residential site and from two plaster manufacturing factories close to the suburban residential site. (C) 2000 Elsevier Science Ltd. All rights reserved.