| 珠三角某石化园区VOCs排放特征及影响评价 |
| 摘要点击 2282 全文点击 715 投稿时间：2021-07-22 修订日期：2021-09-14 |
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| 中文关键词 挥发性有机物(VOCs) 石化行业 污染源反应性(SR) 恶臭污染 健康风险 |
| 英文关键词 volatile organic compounds (VOCs) petrochemical industry source reactivity odor health risk assessment |
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| 中文摘要 |
| 石化行业是挥发性有机物（VOCs）的重要来源之一，然而，当前石化行业VOCs研究多集中于炼油厂VOCs排放特征分析，针对有机化工和合成材料等子行业的研究较为缺乏.选取珠三角地区某石化园区中石油炼制、合成材料和有机化工3个主要行业的8家代表性企业和园区周围敏感点为研究对象，采集分析了包含22种含氧VOCs（OVOCs）在内的115种VOCs物种，识别了VOCs浓度及组分特征，并开展了源反应性（SR）、恶臭指数、致癌和非致癌健康风险影响评价.结果表明：①石化园有组织排放的VOCs浓度变化较大，其范围为0.2~46.3mg·m-3，排放的VOCs组分受废气处理设备影响显著，经燃烧类设备处理后的VOCs主要组分为甲醛，经非燃烧类设备处理后的VOCs主要组分为1，3-丁二烯、丙烯和异丁烷等组分；②大多数企业无组织排放点和敏感点VOCs主要组分为丙酮、甲醛和乙酸乙酯等OVOCs，石油储罐区无组织排放VOCs以烷烃为主；③ SR主要贡献种类为OVOCs、芳香烃和烯烃，其贡献率分别为43.1%、24.2%和21.1%，大多数企业的SR主要贡献组分为甲醛、乙醛、间/对-二甲苯、乙烯和甲苯；④无组织排放点和敏感点均存在恶臭影响，引起恶臭的主要组分为乙醛、正丁醛、丙醛、己醛和戊醛等OVOCs；⑤所测行业均未发现致癌风险，但树脂生产和醛醇生产企业的无组织排放点和敏感点存在非致癌风险，主要由丙烯醛、乙醛和丙醛等OVOCs引起.识别的珠三角地区某石化园区VOCs排放特征和影响，可为制定石化园区基于优控VOCs组分的精准管控策略提供科学支撑. |
| 英文摘要 |
| The petrochemical industry is one of the major emission sources of volatile organic compounds (VOCs). However, the current studies have mostly focused on the identification of the chemical characteristics of non-methane hydrocarbon (NMHC) VOCs species from the petroleum refining sub-sector. Research on the characteristics of VOCs components in oxygenated VOCs (OVOCs) species and other important sub-sectors is still lacking. Therefore, eight enterprises at a petrochemical industrial park in the Pearl River Delta region were carefully selected to represent three major subsectors, namely petroleum refining, synthetic materials, and organic chemicals, for the petrochemical industry. The VOCs (including 22 OVOCs species) from stack emissions and fugitive emissions, as well as nearby sensitive sites, were sampled, and the source reactivity (SR), the thresholds of malodor, and the carcinogenic and non-carcinogenic risks were assessed. The main results were as follows:① the VOCs concentrations of the stack emissions from the petrochemical industrial park were between 0.2-46.3 mg·m-3. The VOCs species were greatly affected by the type of after-treatment technology. A major VOC species emitted from the combustion-based after treatments was formaldehyde, whereas the species emitted from the non-combustion-based equipment were acetone, 1,3-butadiene, acrylic, and isobutane. ② The fugitive VOCs emissions from the petroleum storage tank area were dominated by alkanes, whereas the other fugitive emission sites and the sensitive sites were dominated by OVOCs such as acetone, formaldehyde, and ethyl acetate. ③ The SRs were mainly contributed by OVOCs, aromatics, and olefins, with average proportions of 43.1%, 24.2%, and 21.1%, respectively, with the major species being formaldehyde, acetaldehyde, m/p-xylene, ethylene, and toluene. ④ The malodor appeared both in fugitive emission areas and the sensitive sites. The main odor components were OVOCs such as n-butyraldehyde, propionaldehyde, hexanal, and valeraldehyde. ⑤ The non-carcinogenic risks occurred in the fugitive emission areas and the sensitive sites of resin, alcohol, and aldehyde production, which were mainly caused by OVOCs such as free acetaldehyde, acrolein, and propionaldehyde. No carcinogenic risk was found in any of the sampled sites. This research can provide scientific support for the formulation of priority VOCs species-based precise control strategies in petrochemical industrial parks. |
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