Source Profiles and Chemical Reactivity of Volatile Organic Compounds from Surface Coating of Aluminum Products in Foshan, China

被引：2
|
作者：
Li X. [1 ]
Su W.-J. [1 ]
Li B.-X. [1 ]
Long M. [1 ]
Li L.-L. [2 ]
Zhang Z. [3 ]
Yu Y.-G. [4 ]
Wang Y.-P. [2 ]
Wang X.-M. [2 ]
机构：
[1] Environmental Technological Center of Nanhai District in Foshan City, Foshan
[2] Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou
[3] Changsha Center for Mineral Resources Exploration, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Changsha
[4] Hunan Chengyuan Testing Co., Ltd., Changsha
来源：
Su, Wei-Jian (93883018@qq.com) | 2018年 / Science Press卷 / 39期
关键词：
Aluminum products; Ozone formation potential (OFP); Source profile; Surface coating; Volatile organic compounds (VOCs);
D O I：
10.13227/j.hjkx.201803224
中图分类号：
学科分类号：
摘要：
Volatile organic compounds (VOCs) samples were collected and analyzed for the surface coating processes of aluminum products in Foshan. The concentration levels of VOCs from solvent-based coating (63.90-149.67 mg•m -3 ) are much higher than that from water-based, electrophoretic, and powder coating (2.99-21.93 mg•m -3 ). With respect to the VOC composition, aromatics are the main VOC group of solvent-based coating emission, ranging from 52.32%-71.55%. Typical species include toluene, ethylbenzene, xylene, and ethyl acetate. The VOCs emitted from water-based coating are mainly oxygenated VOCs, such as ethyl acetate (48.59%) and tetrahydrofuran (8.43%), while the percentage of aromatics (11.32%) is lower than that of solvent-based coating. Isopropanol is the most abundant species of electrophoretic coating emissions, accounting for up to 81.19% of the VOCs. The major VOC compounds of powder coating processes are acetone (30.25%), propane (15.48%), ethylene (12.15%), ethane (9.35%), and n-butane (5.16%). The calculation of the ozone formation potential (OFP) shows that the solvent-based coating has the highest OFP (3.89 g•g -1 ), followed by powder coating (2.53 g•g -1 ), while water-based and electrophoretic coating have lower OFPs (1.31 and 0.85 g•g -1 , respectively). The most important contributor to OFP of solvent-based coating are aromatics, especially C 7 -C 10 aromatics. The major contributors of water-based coating are ethyl acetate, m/p-xylenes, and toluene, with contributions of 23.24%, 21.76%, and 17.07%, respectively. The key reactive components of powder coating are ethylene, propene, and 1-butene; the sum of alkenes accounts for 71.11% of the OFP. With respect to the contribution of VOCs emitted from electrophoretic coating to the OFP, the percentage of isopropanol (65.08%) is significantly larger than that of other species (<6%). © 2018, Science Press. All right reserved.
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页码：5334 / 5343
页数：9
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