Fine and ultrafine particle- and gas-polycyclic aromatic hydrocarbons affecting southern Thailand air quality during transboundary haze and potential health effects
Fine and ultrafine particle- and gas-polycyclic aromatic hydrocarbons affecting southern Thailand air quality during transboundary haze and potential health effects
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DOI：
10.1016/j.jes.2021.11.005
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发表时间：
2022-02-02
影响因子：
6.9
通讯作者：
Dejchanchaiwong, Racha
中科院分区：
文献类型：
--
作者：
Mahasakpan, Napawan;Chaisongkaew, Phatsarakorn;Dejchanchaiwong, Racha
研究了泰国南部某背景地点2019年正常、部分和强雾霾期间PM0.1、PM1和PM（2.5）颗粒和气体多环芳烃（PAHs）的分布，以了解其行为和致癌风险。在偏霾期和强霾期，PM 1是主要成分，分别占总悬浮颗粒物的45.1%和52.9%，而在正常期，PM 1的贡献仅为34.0%。强霾期PM0.1浓度约为正常期的2倍。强霾期PM0.1、PM1和PM（2.5）的颗粒多环芳烃含量显著增加，分别是正常期的3、5和6倍。PM2.5中气体多环芳烃浓度是颗粒多环芳烃浓度的10 ~ 36倍。霾期PM0.1、PM1和PM2.5的平均总苯并[a]芘毒性当量（BaP-TEQ）约为正常期的2-6倍。在受雾霾影响的情况下，所有年龄组的PM0.1、PM1和PM（2.5）的总累积增量终身癌症风险（ILCRs）约为非雾霾情况下的1.5倍，表明潜在的致癌风险更高。这些观测结果表明，PM0.1、PM1和PM2.5是致癌性气溶胶的重要来源，并受到泥炭地火灾产生的跨境雾霾的显著影响。这导致烟雾气溶胶的体积增加，对泰国南部以及东南亚下游许多其他国家的空气质量产生重大影响。(C) 2022中国科学院生态环境科学研究中心Elsevier B.V.出版
Distribution of PM0.1, PM1 and PM(2.5 )particle- and gas-polycyclic aromatic hydrocarbons (PAHs) during the 2019 normal, partial and strong haze periods at a background location in southern Thailand were investigated to understand the behaviors and carcinogenic risks. PM 1 was the predominant component, during partial and strong haze periods, accounting for 45.1% and 52.9% of total suspended particulate matter, respectively, while during normal period the contribution was only 34.0%. PM0.1 concentrations, during the strong haze period, were approximately 2 times higher than those during the normal period. Substantially increased levels of particle-PAHs for PM0.1, PM1 and PM(2.5 )were observed during strong haze period, about 3, 5 and 6 times higher than those during normal period. Gas-PAH concentrations were 10 to 36 times higher than those of particle-PAHs for PM2.5. Average total Benzo[a]Pyrene Toxic Equivalency Quotients (BaP-TEQ) in PM0.1, PM1 and PM2.5 during haze periods were about 2-6 times higher than in the normal period. The total accumulated Incremental Lifetime Cancer Risks (ILCRs) in PM0.1, PM1 and PM(2.5 )for all the age-specific groups during the haze effected scenario were approximately 1.5 times higher than those in nonhaze scenario, indicating a higher potential carcinogenic risk. These observations suggest PM0.1, PM1 and PM2.5 were the significant sources of carcinogenic aerosols and were significantly affected by transboundary haze from peatland fires. This leads to an increase in the volume of smoke aerosol, exerting a significant impact on air quality in southern Thailand, as well as many other countries in lower southeast Asia. (C) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.