| 佛山市典型铝型材行业表面涂装VOCs排放组成 |
| 摘要点击 3906 全文点击 1337 投稿时间：2018-03-31 修订日期：2018-05-27 |
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| 中文关键词 铝型材行业 表面涂装 挥发性有机物(VOCs) 源成分谱 臭氧生成潜势(OFP) |
| 英文关键词 aluminum products surface coating volatile organic compounds (VOCs) source profile ozone formation potential (OFP) |
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| 中文摘要 |
| 选取佛山市典型铝型材行业不同表面涂装工艺（溶剂型涂料涂装、水性涂料涂装、电泳涂装、粉末喷涂）有组织废气VOCs进行了采样分析.结果表明，溶剂型涂料涂装废气VOCs浓度（63.90~149.67 mg·m-3）要远大于其他3种涂装工艺（2.99~21.93 mg·m-3）.VOCs组成来看，溶剂型涂料涂装废气VOCs以芳香烃为主，比例在52.32%~71.55%之间，主要污染物包括甲苯、乙苯、二甲苯等苯系物和乙酸乙酯等含氧挥发性有机物（OVOCs）.水性涂料涂装废气以OVOCs为主，如乙酸乙酯（48.59%）、四氢呋喃（8.43%），芳香烃比例（11.32%）远低于溶剂型涂料涂装废气.异丙醇是电泳涂装废气中最主要的VOCs化合物，贡献比例高达81.19%.而粉末涂料涂装废气VOCs污染物主要是丙酮（30.25%），以及丙烷（15.48%）、乙烯（12.15%）、乙烷（9.35%）、正丁烷（5.16%）等C2~C4的烷烃和烯烃.臭氧生成潜势（OFP）计算结果表明，溶剂型涂料涂装废气排放单位质量VOCs的臭氧生成潜势（OFP，以O3/VOCs计，下同）最高（3.89 g·g-1），其次是粉末喷涂（2.53 g·g-1），而水性涂料涂装和电泳涂装则较低（1.31 g·g-1和0.85 g·g-1）.溶剂型涂料涂装废气中芳香烃对OFP贡献比例高达93.28%，有9种C7~C10芳香烃位列OFP排名前10化合物；水性涂料涂装废气中乙酸乙酯、间/对-二甲苯和甲苯的臭氧生成潜势占比最高，分别为23.24%、21.76%和17.07%；粉末涂料涂装废气中的关键活性组分则为乙烯、丙烯和1-丁烯等低碳烯烃，烯烃对其OFP贡献为71.11%；电泳涂料涂装废气中异丙醇的OFP贡献（65.08%）明显高于其他组分（<6%）. |
| 英文摘要 |
| 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 C7-C10 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%). |
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