Institute of Urban and Industrial Water Management, Technische Universität Dresden, 01062 Dresden, Germany.
Institute of Groundwater and Earth Sciences, Jinan University, 510632 Guangzhou, China.
Environ Sci Technol. 2021 Mar 16;55(6):3582-3592. doi: 10.1021/acs.est.0c08119. Epub 2021 Mar 1.
China is the largest emitter of polycyclic aromatic hydrocarbons (PAHs) in the world. Because of their negative influences on human health, the characteristics and potential driving forces of PAH emissions should be evaluated to establish effective mitigation strategies for different economic sectors. This study is the first to quantify the embodied and enabled PAH emissions of 108 sectors in China in 2002, 2007, 2012, and 2017. The results show that the total sectoral emissions increased by 92% (from 28.0 to 53.7 kt) from 2002 to 2012 and decreased to 53.0 kt in 2017. The eight aggregated sectors had different characteristics according to their production-, consumption-, and income-based emissions. Both the embodied and enabled emission flows increased (from 13.8 to 29.2 kt and from 11.3 to 20.5 kt, respectively) with time. The influences of the major final demands and primary inputs reversed from increasing to decreasing emissions over time. In particular, the primary input structure had a stronger impact on decreasing emissions than the final demand structure. The results revealed that different mitigation policies should be applied to different sectors and that adjusting primary input behaviors might be a relatively efficient method to reduce PAH emissions.
中国是世界上最大的多环芳烃（PAHs）排放国。由于其对人类健康的负面影响，应该评估 PAH 排放的特征和潜在驱动力，以便为不同的经济部门制定有效的缓解策略。本研究首次量化了 2002 年、2007 年、2012 年和 2017 年中国 108 个部门的隐含和实现 PAH 排放。结果表明，2002 年至 2012 年，总部门排放量增加了 92%（从 28.0 增加到 53.7 kt），2017 年降至 53.0 kt。根据生产、消费和收入排放，八个综合部门具有不同的特征。随着时间的推移，隐含和实现的排放流都在增加（分别从 13.8 kt 增加到 29.2 kt 和从 11.3 kt 增加到 20.5 kt）。随着时间的推移，主要最终需求和初级投入对排放的影响从增加转为减少。特别是，初级投入结构对减少排放的影响强于最终需求结构。结果表明，不同的缓解政策应适用于不同的部门，调整初级投入行为可能是减少 PAH 排放的一种相对有效的方法。
