The removal capacity of aftertreatment technologies equipped on diesel exhaust in intermediate and semivolatile organic compounds (I/SVOCs) remains unclear. This study quantified the effect of typical aftertreatment technologies (China VI) on diesel engine-emitted I/SVOCs, related secondary organic aerosol (SOA), and toxic effects. The equipped aftertreatment devices could mitigate the emission factors (EFs) by 70.8 ± 3.4 to 82.5 ± 20.9% for I/SVOCs, 72.7 ± 18.6 to 77.5 ± 4.2% for SOA production, and 75.7 ± 9.3 to 82.4 ± 9.2% for toxic equivalent quantity (TEQ). Aftertreatment units are better for removing alkanes, benzenes, and ketones. The TEQ from the cold-start cycle is 1.3- to 5.7-fold higher than that from the hot-start cycle. In contrast, the EFs of ship-emitted I/SVOCs are 3.7- to 5.3-fold higher than those of diesel vehicles equipped with an aftertreatment system when burning the same fuel, leading to 2.1- to 3.0-fold higher SOA production and 3.1- to 6.7-fold TEQ. Implementation of control devices on marine diesel engines could reduce I/SVOC EFs, SOA production, and eye irritation TEQ of ships by 76.7 ± 12.2, 75.1 ± 12.2, and 79.1 ± 9.6%, respectively. These results indicate that it is vital to equip marine engines with aftertreatment technologies to improve air quality and protect human health.

中文翻译：

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后处理技术对减轻典型柴油发动机排放的 I/SVOC 产生的 SOA 和毒性的贡献


柴油机尾气配备的后处理技术对中等和半挥发性有机化合物 （I/SVOC） 的去除能力仍不清楚。本研究量化了典型后处理技术（国六）对柴油机排放的 I/SVOC、相关的二次有机气溶胶 （SOA） 和毒性影响的影响。配备的后处理装置可以将 I/SVOC 的排放因子 （EFs） 降低 70.8 ± 3.4 至 82.5 ± 20.9%，SOA 生产排放因子 （EFs） 降低 72.7 ± 18.6 至 77.5 ±至 4.2%，有毒当量 （TEQ） ± 75.7 9.3 至 82.4 ± 9.2%。后处理装置更适合去除烷烃、苯和酮。冷启动循环的 TEQ 比热启动循环的 TEQ 高 1.3 至 5.7 倍。相比之下，在燃烧相同燃料时，船舶排放的 I/SVOC 的 EF 比配备后处理系统的柴油车高 3.7 至 5.3 倍，导致 SOA 产生高 2.1 至 3.0 倍，TEQ 高 3.1 至 6.7 倍。在船用柴油机上实施控制装置可将船舶的 I/SVOC EFs、SOA 产生和眼睛刺激 TEQ 分别降低 76.7 ± 12.2、75.1 ± 12.2 和 79.1 ± 9.6%。这些结果表明，为船用发动机配备后处理技术以改善空气质量和保护人类健康至关重要。