College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; School of Resource and Environmental Sciences, Wuhan University, Wuhan, 430079, China; Department of Environmental Engineering, Kyoto University, Kyoto City, 6158540, Japan.
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
J Environ Manage. 2021 Apr 15;284:111994. doi: 10.1016/j.jenvman.2021.111994. Epub 2021 Jan 27.
Atmospheric Polycyclic Aromatic Hydrocarbons (PAHs) emissions cause non-negligible damage to human health and well-being. Effective regional cooperation is urgently required to mitigate PAHs emissions to maintain satisfactory air quality. This study quantified and tracked China's PAHs emissions flows embodied in interprovincial trade. A production-based emissions inventory of 16 U.S. EPA priority PAHs based on commercial energy consumption in China in 2012 was compiled using the emissions factor approach. Then, a multiregional input-output model was constructed to reveal consumption-based emissions and to track the PAHs emissions embodied in the trade of 27 major sectors across 30 regions in China. Key structural paths were also identified using structural path analysis (SPA). In 2012, the total industrial energy-derived PAHs emissions were estimated to be 47.7 tons of BaP-toxic equivalents (8032.7 tons of mass). Shandong, Hebei, and Hubei accounted for more than 24.0% of the production-side PAHs emissions in the whole country. Approximately 30.8% of China's PAHs emissions were embodied in goods consumed outside of the province in which they were produced. PAHs flow tended to start in the western regions and ended in the eastern regions along the coast. The results of the SPA showed that critical paths, such as from the Metallurgy sector to the Construction sector, embodied a large amount of emissions and had the potential to affect the performance of the entire system. By paying attention to the consumption-based accounting as well as the production-based accounting of emissions and by focusing on vital transfer paths, policymakers can devise effective and targeted environmental protection and sustainable development policies in China.
大气多环芳烃（PAHs）排放对人类健康和福祉造成了不可忽视的损害。为了减轻 PAHs 排放以维持令人满意的空气质量，迫切需要进行有效的区域合作。本研究量化并跟踪了中国省际贸易中隐含的 PAHs 排放流。本研究基于 2012 年中国商业能源消费，采用排放因子法，编制了基于生产的 16 种美国环保署优先 PAHs 排放清单。然后，构建了一个多区域投入产出模型，以揭示基于消费的排放，并跟踪中国 30 个地区 27 个主要部门贸易中隐含的 PAHs 排放。还使用结构路径分析（SPA）确定了关键结构路径。2012 年，工业能源衍生的总 PAHs 排放量估计为 47.7 吨 BaP-毒性当量（8032.7 吨质量）。山东、河北和湖北占全国生产侧 PAHs 排放量的 24.0%以上。中国约 30.8%的 PAHs 排放是在其生产省份之外消费的商品中隐含的。PAHs 流倾向于从西部地区开始，沿着海岸线在东部地区结束。SPA 的结果表明，从冶金部门到建筑部门等关键路径，蕴含着大量的排放，有可能影响整个系统的性能。通过关注排放的基于消费的核算和基于生产的核算，并关注重要的传递路径，决策者可以在中国制定有效的、有针对性的环境保护和可持续发展政策。
