By Guodong Zhang, Shengguo Cheng
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Additional resources for Advances in Environmental Engineering: Selected, Peer Reviewed Papers from the 2012 Global Conference on Civil, Structural and Environmental ... International
5. Environmental Science and Technology 43, 42874293(2009). ,et al. Chemical features and seasonal variation of fine aerosol water-soluble organic compounds in the Po Valley, Italy. Atmospheric Environment. 35:3691-3699 (2001). 5 in Guangzhou, China[J]. 329～341(2005). Wang. 5 in Beijing during Spring Festival of 2007. The 5th Mainland-Taiwan aresols Conference. 2-6 2008,93~99.  Jiang Y L, Hou X M, Zhuang G S, et al. 5 in Beijing and Shanghai, Journal of Atmospheric Chemistry, 62(3): 175-192(2009).
5, PM1, respectively. Fatty acids and dicarboxylic acids concentrate mainly in the PM1. C11-C24 of fatty acids exhibit a significant even carbon predominances, but dicarboxylic acids present no parity preponderance. 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.
Cu-Zn-Al catalyst Jun Yang studied four kinds of aluminum source to prepare 1, 4 - butanediol dehydrogenation and furfural hydrogenation in the presence of Cu-Zn-Al catalyst . 2) to get the copper-zinc active solution. 2. Subsequently, such alumina sol and above copper-zinc active maternal are mixed and aged for 3 h to get precipitate, which was washed, filtered and dried at 100 -110 ° C for 24h to prepare the Cu-Zn-Al catalyst (denominated as Al1 ). Following the similar steps, Cu-Zn-Al catalyst Al2 and Al3 can also be prepared by the mixing of Al2O3 powder and Al (OH) 3 powder.