颗粒物中苯并噻唑及其衍生物的污染特征及暴露评价

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Abstract

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 PM_2.5 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 PM_2.5 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 PM_2.5 and PM₁₀, which indicates that PM_2.5 and PM₁₀ of roadside air have the same source. The ratio of the concentration of BTs in PM_2.5 and PM₁₀(PM_2.5/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.

Key words： roadside environment PM_2.5 and PM₁₀ tire wear benzothiazole and its derivatives exposure assessment

Received: 12 July 2019

PACS:

X513

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	Articles by authors
	ZHANG Jing
	WANG Ting
	MEN Zheng-yu
	MAO Hong-jun
	WU Yu-feng

Cite this article:

ZHANG Jing,WANG Ting,MEN Zheng-yu等. Pollution characteristics and exposure assessment of benzothiazole and its derivatives in ambient air particulates[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(2): 851-856.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I2/851

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