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| Pollution characteristics and control strategies of volatile organic compounds in coking pollution area in spring |
| LI Hong-yan1, ZHANG Yan-ru1, FU Guo1, HUANG Shi-dan1, LI Hong-yu3, CUI Yang1, GAO Xue-ying1, HE Qiu-sheng1, BAI Jing-ai4, ZHANG Guo-zhong2, WEN Biao1 |
1. School of Environment and Resources, Taiyuan University of Science and Technology, Taiyuan 030024, China;
2. National Research Center for Environmental Analysis and Measurement, Environmental Development Center of the Ministry of Ecology and environment, Beijing 100029, China;
3. Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;
4. Fenner School of Environment and society, Australian National University, Canberra ACT 2600, Australia |
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Abstract This work analyzed the pollution characteristics of volatile organic compounds (VOCs) collected from Jiexiu (JX) and Fangshan (FS). Ozone formation potential (OFP) of VOCs was quantified by the propylene equivalent concentration (PEC) method and maximum incremental reactivity (MIR) method. The fractional aerosol coefficient (FAC) method and the secondary organic aerosol potential (SOAP) method were used to calculate the secondary organic aerosol formation potential (SOAFP) of VOCs. Meanwhile, health risks of toxic VOCs were evaluated via health risk assessment method. Furthermore, combined with the entropy method and positive matrix factorization (PMF) source apportionment model, the priority control species and the priority control pollution sources of VOCs were identified. The results showed that the concentration of total volatile organic compounds (TVOCs) in Jiexiu coking area was 2.7 times higher than that of Fangshan. The VOCs in Jiexiu were characterized by a low proportion of alkanes and high proportions of aromatics and alkenes. OFP, SOAFP, and health risks in Jiexiu were 3.0, 8.9, and 8.8 times higher than those of Fangshan, respectively. Reduction of alkenes and aromatics emissions will be an effective way to control secondary pollutants and health risks in Jiexiu. Coking was the main source of VOCs (32.4%), followed by gasoline exhaust (29.0%) and solvent using (16.9%) in Jiexiu. Among, coking was also the main source of benzene and ethene, which were the primary pollutants controlled in Jiexiu, contributing up to 74.1% and 98.9%, respectively. While gasoline exhaust (52.0%) and solvent using (31.3%) were the main sources of the primary controlled pollutant toluene.
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Received: 21 July 2023
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Corresponding Authors:
张国忠,工程师,zgz_cneac@163.com
E-mail: zgz_cneac@163.com
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