Wang Xuying, Lei Yu, Yan Li, Liu Tao, Zhang Qiang, He Kebin
School of Environment, Tsinghua University, Beijing 100084, China; Chinese Academy of Environmental Planning, Beijing 100012, China.
Chinese Academy of Environmental Planning, Beijing 100012, China.
Sci Total Environ. 2019 Aug 1;676:18-30. doi: 10.1016/j.scitotenv.2019.04.241. Epub 2019 Apr 19.
It is important to understand the emission characteristics of PM and its precursors for the iron and steel industry in high resolution, considering its significant contribution to the total national emissions and the pressing need for more scientific and specific strategies of air pollution control in China. We developed a unit-based emission inventory of SO, NO, PM, PM and TSP for the Chinese iron and steel industry from 2010 to 2015 by integrating source-specific unabated emission factors with unit-based information of both the activity rate and abatement technology from ~4900 production facilities in mainland China. This is the first study that accomplished a unit-based and source-specific emission inventory of SO, NO, PM, PM and TSP updated to 2015 for the Chinese iron and steel industry. Based on our estimates, despite the rise of 26.1% in crude steel production from 2010 to 2015, the annual emissions of SO, PM, PM, TSP were reduced by 27.9%, 27.4%, 36.1% and 50.4% respectively, and the NO had increased by 12.4% for the Chinese iron and steel industry. The emissions of SO and PM from sintering, pelletizing, BF, BOF, and EAF all significantly decreased. Hebei, Jiangsu, Shandong, Liaoning, Shanxi, Henan, and Hubei are hot spots for the air pollutant emissions of the iron and steel industry. Our results suggest that the strengthened capacity policy and emission control policy were two major human driving forces of the emission mitigation of SO and PM for the Chinese iron and steel industry, with the latter playing a more important role during the period of 2010-2015.
鉴于钢铁行业对全国总排放量的重大贡献以及中国对更科学、具体的空气污染控制策略的迫切需求，高分辨率了解钢铁行业颗粒物（PM）及其前体的排放特征非常重要。我们通过将特定源的未减排排放因子与中国大陆约4900家生产设施基于单位的活动率和减排技术信息相结合，编制了2010年至2015年中国钢铁行业基于单位的二氧化硫（SO）、氮氧化物（NO）、PM、细颗粒物（PM₂.₅）和总悬浮颗粒物（TSP）排放清单。这是第一项完成的针对中国钢铁行业、更新至2015年的基于单位和特定源的SO、NO、PM、PM₂.₅和TSP排放清单研究。根据我们的估算，尽管2010年至2015年粗钢产量增长了26.1%，但中国钢铁行业SO、PM、PM₂.₅、TSP的年排放量分别减少了27.9%、27.4%、36.1%和50.4%，而NO排放量增加了12.4%。烧结、球团、高炉、转炉和电炉的SO和PM排放量均显著下降。河北、江苏、山东、辽宁、山西、河南和湖北是钢铁行业空气污染物排放的热点地区。我们的结果表明，强化产能政策和排放控制政策是中国钢铁行业SO和PM减排的两大主要人为驱动力，后者在2010 - 2015年期间发挥了更重要的作用。
