A sampling program was conducted to determine the levels of benzothiazole and its five derivatives (BTs, including BT、2-NH2-BT、2-OH-BT、MBT、MTBT) in PM2.5 and PM10 using UPLC-triple quadrupole MS. Three sampling points located at urban background and roadsides were selected. Pollution characteristics and exposure risks of target compounds were evaluated. The concentration of BT in PM2.5 and PM10 samples was the highest at all three points, accounting for 44.4%~55.2% of the total concentration. Concentration of BTs tended to be the highest at the roadside with high braking frequency, indicating that high braking frequency resulted in more tire wear particles in roadside air. There were good linear relationships between the concentration of BTs (except 2-NH2-BT) in PM2.5 and PM10, which indicates that PM2.5 and PM10 of roadside air have the same source. The ratio of the concentration of BTs in PM2.5 and PM10(PM2.5/PM10) ranged from 0.41 to 0.95, indicating that BTs are more easily concentrated in fine particles or fine particles are the main fraction of tire wear emission. The results of exposure assessment showed that the daily inhalation exposure dose of roadside workers to BTs was greater than other people, which may cause a higher health risk. BT contributed the most to inhalation exposure dose among five compounds.
张静, 王婷, 门正宇, 毛洪钧, 吴宇峰. 颗粒物中苯并噻唑及其衍生物的污染特征及暴露评价[J]. 中国环境科学, 2020, 40(2): 851-856.
ZHANG Jing, WANG Ting, MEN Zheng-yu, MAO Hong-jun, WU Yu-feng. Pollution characteristics and exposure assessment of benzothiazole and its derivatives in ambient air particulates. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(2): 851-856.
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