| 北京市典型溶剂使用类园区VOCs污染特征及来源解析 |
| 摘要点击 1448 全文点击 339 投稿时间：2023-10-20 修订日期：2024-01-05 |
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| 中文关键词 挥发性有机物（VOCs） 溶剂使用类园区 采暖期 污染特征 臭氧生成潜势（OFP） 来源解析 |
| 英文关键词 volatile organic compounds（VOCs） solvent-using industrial park heating period pollution characteristics ozone formation potential（OFP） source apportionment |
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| 中文摘要 |
| 采用BCT-7800A PLUS 挥发性有机物在线监测系统,于2023年1~6月对北京市典型有机溶剂使用类园区大气中挥发性有机化合物（VOCs）的污染特征、来源解析以及臭氧生成潜势（OFP）进行研究,并对采暖和非采暖期污染变化进行比较分析. 结果表明,2023年1~6月该园区ρ（TVOCs）为（104.21 ±91.31）μg·m-3,偏南风和偏北风作用下的ρ（TVOCs）分别为（214.18 ±202.37）μg·m-3和（197.56 ±188.35）μg·m-3. 烷烃是浓度平均值和贡献率最高的物种,分别为（45.53 ±41.43）μg·m-3和31.70%. 采暖期的ρ（TVOCs）高于非采暖期,分别为（111.57 ±83.96）μg·m-3和（87.92 ±75.03）μg·m-3,其中丙烷和乙烷为采暖期浓度平均值最大的物种. 与非采暖期相比,VOCs浓度前10物种中有3种（丙烷、乙烷和正丁烷）在采暖期的浓度平均值增加,浓度平均值分别增加了51.94%、54.64%和26.32%. 基于正定矩阵因子分解（PMF）模型源解析结果表明,监测期间园区VOCs的主要来源为：印刷排放源（4.95%）、油气挥发源（9.52%）、燃料燃烧源（15.44%）、交通排放源（18.97%）、电子设备制造源（24.59%）和工业涂装源（26.52%）. 与非采暖期相比,工业涂装源、交通排放源和燃料燃烧源在采暖期的贡献率更高,VOCs浓度分别增加了15.02%、16.53%和24.98%. 监测期间5~6月VOCs的OFP平均值为198.51 μg·m-3,OVOCs、烯烃和芳香烃对OFP的贡献最大,贡献率分别为47.41%、22.15%和18.41%. 电子设备制造源是该园区夏季OFP最大的贡献源,其贡献率为30.11%,因此电子设备制造源对园区夏季臭氧污染影响较大,应加强治理. |
| 英文摘要 |
| The BCT-7800A PLUS VOC online monitor system was employed to measure ambient volatile organic compounds （VOCs） in a typical solvent-using industrial park in Beijing. From January to June 2023, the pollution characteristics, source apportionment, and ozone formation potential（OFP）of VOCs were studied, and the results of a comparative analysis were also discussed between heating and non-heating periods. The results indicated that VOC concentrations from January to June 2023 were （104.21 ± 91.31） μg·m-3 on average. The concentrations of TVOCs under the influence of southerly and northerly winds were （214.18 ± 202.37） μg·m-3 and （197.56 ± 188.3） μg·m-3, respectively. Alkanes were the species with the highest average concentration and proportion, respectively （45.53 ± 41.43） μg·m-3. The VOC concentration during the heating period was higher than those during the non-heating period, with values of （111.57 ± 83.96） μg·m-3 and （87.92 ± 75.03） μg·m-3, respectively. Propane and ethane were the species with the highest average concentration during the heating period. Compared with those in the non-heating period, the average concentrations of three species （propane, ethane, and n-butane） in the top ten species increased during the heating period, with average concentrations increasing by 51.94%, 54.64%, and 26.32%, respectively. The source apportionment results based on the positive matrix factorization （PMF） model indicated that the major sources of VOCs in the park during the monitoring period were printing emission sources （4.95%）, oil and gas evaporation sources （9.52%）, fuel combustion sources （15.44%）, traffic emissions sources （18.97%）, electronic equipment manufacturing （24.59%）, and industrial painting sources （26.52%）. Therefore, industrial painting sources, electronic equipment manufacturing sources, and traffic emissions sources were the emission sources that the park should focus on controlling. Compared with those during non-heating periods； industrial painting, traffic emission, and fuel combustion sources contributed more during the heating period, with VOC concentrations increasing by 15.02%, 16.53%, and 24.98%, respectively. The average OFP of VOCs from May to June during the monitoring period was 198.51 μg·m-3 and OVOCs, olefins, and aromatic hydrocarbons contributed the most to OFP, which were 47.41%, 22.15%, and 18.41%, respectively. The electronic equipment manufacturing source was the largest contributor to the summer OFP of the park and its contribution rate was 30.11%, which should be strengthened in the future. |
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