PMID- 34793850 OWN - NLM STAT- MEDLINE DCOM- 20220126 LR - 20220126 IS - 1879-1298 (Electronic) IS - 0045-6535 (Linking) VI - 291 IP - Pt 2 DP - 2022 Mar TI - Trends in air pollutant emissions from the sintering process of the iron and steel industry in the Fenwei Plain and surrounding regions in China, 2014-2017. PG - 132917 LID - S0045-6535(21)03389-0 [pii] LID - 10.1016/j.chemosphere.2021.132917 [doi] AB - China is the largest iron and steel producer and consumer in the world. The iron and steel manufacture, especially the sintering process, is energy-intensive, and contributes substantially to air pollutant emissions in China. Compared with other regions, the Fenwei Plain, a coal base, has a heavy industry concentration, and high pollutant emission total amount. In addition, urban air pollution has rebounded, and the pollutants concentrations in many cities have increased rather than decreased. In this study, we investigated the inter-annual trends of particulate matter (PM), sulfur dioxide (SO(2)) and nitrogen oxide (NO(x)) from the sintering process of iron and steel industry (ISI) in the Fenwei Plain and the surrounding regions in China from 2014 to 2017 based on the Continuous Emission Monitoring System (CEMS). We found that the oxygen content of the flue gas is the key to judge whether the sintering flue gas air pollutant emission concentration can meet the standard. Therefore, we adopted the converted concentration by the reference oxygen content in the final analysis. Overall, the SO(2) and PM emission concentrations exhibit a downward trend from 2014 to 2017, in response to the strengthening of the emission control policies and standards in the ISI, whereas the NO(x) emission concentration did not change significantly during the same period The emission factors (EFs) of PM, NO(x) and SO(2) obtained in this study are lower than previous estimates. In 2017, the SO(2) and PM emissions were 27% and 32% lower than the levels in 2014.While NO(x) was 22% higher than the level in 2014. Our study confirmed the effectiveness of current emission control policies and standards in the iron and steel sector. However, the levels of NO(x) emissions were still high until 2017, illustrating the urgent need for more advanced emission control technologies to further reduce NO(x) emissions from the sintering flue gas in China. CI - Copyright (c) 2021. Published by Elsevier Ltd. FAU - Wang, Si AU - Wang S AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China. FAU - Liu, Jun AU - Liu J AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Beijing Municipal Industry Pollutant Resources Processing, Beijing, 100083, China. FAU - Yi, Honghong AU - Yi H AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Beijing Municipal Industry Pollutant Resources Processing, Beijing, 100083, China. Electronic address: yhhtxl@163.com. FAU - Tang, Xiaolong AU - Tang X AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Beijing Municipal Industry Pollutant Resources Processing, Beijing, 100083, China. FAU - Yu, Qingjun AU - Yu Q AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Beijing Municipal Industry Pollutant Resources Processing, Beijing, 100083, China. FAU - Zhao, Shunzheng AU - Zhao S AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Beijing Municipal Industry Pollutant Resources Processing, Beijing, 100083, China. FAU - Gao, Fengyu AU - Gao F AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Beijing Municipal Industry Pollutant Resources Processing, Beijing, 100083, China. FAU - Zhou, Yuansong AU - Zhou Y AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Beijing Municipal Industry Pollutant Resources Processing, Beijing, 100083, China. FAU - Zhong, Tingting AU - Zhong T AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China. FAU - Wang, Yaxin AU - Wang Y AD - Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China. LA - eng PT - Journal Article DEP - 20211115 PL - England TA - Chemosphere JT - Chemosphere JID - 0320657 RN - 0 (Air Pollutants) RN - 0 (Particulate Matter) RN - 12597-69-2 (Steel) RN - E1UOL152H7 (Iron) SB - IM MH - *Air Pollutants/analysis MH - *Air Pollution/analysis MH - China MH - Environmental Monitoring MH - Iron MH - Metallurgy MH - Particulate Matter/analysis MH - Steel OTO - NOTNLM OT - Emission concentration OT - Emission factors OT - Oxygen contents OT - Sintering flue gas OT - Temporal and spatial characteristics EDAT- 2021/11/19 06:00 MHDA- 2022/01/27 06:00 CRDT- 2021/11/18 20:13 PHST- 2021/05/22 00:00 [received] PHST- 2021/11/09 00:00 [revised] PHST- 2021/11/14 00:00 [accepted] PHST- 2021/11/19 06:00 [pubmed] PHST- 2022/01/27 06:00 [medline] PHST- 2021/11/18 20:13 [entrez] AID - S0045-6535(21)03389-0 [pii] AID - 10.1016/j.chemosphere.2021.132917 [doi] PST - ppublish SO - Chemosphere. 2022 Mar;291(Pt 2):132917. doi: 10.1016/j.chemosphere.2021.132917. Epub 2021 Nov 15.