Relationship between reactive oxygen species and water-soluble organic compounds: Time-resolved benzene carboxylic acids measurement in the coastal area during the KORUS-AQ campaign

被引：26

作者：

Bae, Min-Suk ^{[1
,2
]}

Schauer, James J. ^{[2
]}

Lee, Taehyoung ^{[3
]}

Jeong, Ju-Hee ^{[4
]}

Kim, Yoo-Keun ^{[4
]}

Ro, Chul-Un ^{[5
]}

Song, Sang-Keun ^{[6
]}

Shon, Zang-Ho ^{[7
]}

机构：

[1] Mokpo Natl Univ, Dept Environm Engn, Muan 58554, South Korea

[2] Univ Wisconsin Madison, Dept Civil & Environm Engn, Madison, WI 53705 USA

[3] Hankuk Univ Foreign Studies, Dept Environm Sci, Gyeonggi 17035, South Korea

[4] Pusan Natl Univ, Dept Atmospher Sci, Busan 46241, South Korea

[5] Inha Univ, Dept Chem, Incheon 22212, South Korea

[6] Jeju Natl Univ, Dept Earth & Marine Sci, Jeju 63243, South Korea

[7] Dong Eui Univ, Dept Environm Engn, Busan 47340, South Korea

来源：

ENVIRONMENTAL POLLUTION | 2017年 / 231卷

基金：

新加坡国家研究基金会;

关键词：

ROS; Benzene carboxylic acid; WSOC; OC; FINE PARTICULATE MATTER; BIOMASS BURNING CONTRIBUTIONS; DICARBOXYLIC-ACIDS; ELEMENTAL CARBON; LOS-ANGELES; ATMOSPHERIC PARTICLES; INDIVIDUAL PARTICLES; CHEMICAL-COMPOSITION; BENZOIC-ACID; ROS ACTIVITY;

D O I：

10.1016/j.envpol.2017.07.100

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study investigated the relationship between water-soluble organic compounds of ambient particulate matter (PM) and cellular redox activity collected from May 28 to June 20 of 2016 at the west coastal site in the Republic of Korea during the KORea-US Air Quality (KORUS-AQ) campaign. Automatic four-hour integrated samples operated at a flow rate of 92 L per minute for the analysis of organic carbon (OC), water-soluble organic carbon (WSOC), elemental carbon (EC), water-soluble ions (WSIs), and benzene carboxylic acids (BCAs) were collected on a 47 mm quartz fiber filter. The influence of atmospheric transport processes was assessed by the Weather Research and Forecasting (WRF) model. OC, EC, WSOC, and BCA were determined by SUNET carbon analyzer, total organic carbon (TOC) analyzer, and liquid chromatography-mass spectrometry mass spectrometry (LC-MSMS), respectively. Twenty-four-hour integrated samples were collected for reactive oxygen species (ROS) analysis using a fluorogenic cell-based method to investigate the main chemical classes of toxicity. The results illustrate that WSOC and specific water-soluble species are associated with the oxidative potential of particulate matter. Pairwise correlation scatterplots between the daily-averaged WSOC and ROS (r(2) of 0.81), and 135-BCA and ROS (r(2) of 0.84), indicate that secondary organic aerosol production was highly associated with ROS activity. In addition, X-ray spectral analysis together with secondary electron images (SEls) of PM25 particles collected during high ROS concentration events clearly indicate that water-soluble organic aerosols are major contributors to PM25 mass. This study provides insight into the components of particulate matter that are drivers of the oxidative potential of atmospheric particulate matter and potential tracers for this activity. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：1 / 12

页数：12

共 43 条

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