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By Guodong Zhang, Shengguo Cheng

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Extra resources for Advances in Environmental Engineering: Selected, Peer Reviewed Papers from the 2012 Global Conference on Civil, Structural and Environmental ... International

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Coal burning for heating is the most important source in January and February, but its contribution decreases sharply in April and May for fatty acids; The main source of dicarboxylic acids is photochemical reactions. Introduction The organic matter has become one of the important components in the atmospheric particulate matter, accounting for 20% to 80% of the aerosol components[1~3]. At present, organic acids are the main components of hundreds of organic compounds which have been identified in the atmospheric particulate matter, including fatty acids, dicarboxylic acids, aromatic acids, hydroxy acids, keto acid, etc[3].

In the fatty acids, the concentration of hexadecanoic acid is the highest with that of octadecanoic acid followed; Nonandioic acid is the highest in dicarboxylic acids. The results of source apportionments indicate that the fatty acids are mainly related with human activities. Coal burning for heating is the most important source in January and February, but its contribution decreases sharply in April and May for fatty acids; The main source of dicarboxylic acids is photochemical reactions. Introduction The organic matter has become one of the important components in the atmospheric particulate matter, accounting for 20% to 80% of the aerosol components[1~3].

59 Dicarboxylic acids do not show significant odd-even carbon predominances which are different from the characteristics of compositions and distributions in fatty acids. Nonandioic acid(diC9) presents the highest mass concentrations in dicarboxylic acids of different particle grades. 3%, respectively. According to the distributions of dicarboxylic acids in each particle sizes, Mass concentration orders of descending arrangement are as follows: diC9> diC8> diC10> diC7> diC6> 20 Advances in Environmental Engineering diC11> diC12.

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