Oxidative Potential by PM_(2.5) in the North China Plain: Generation of Hydroxyl Radical

Li Xiaoying; Kuang Xiaobi M.; Yan Caiqing; Ma Shexia; Paulson Suzanne E.; Zhu Tong; Zhang Yuanhang; Zheng Mei

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Oxidative Potential by PM_(2.5) in the North China Plain: Generation of Hydroxyl Radical

机译：华北平原PM_（2.5）的氧化电位：羟自由基的产生

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摘要

Adverse health effects of ambient PM2.5 (d(p) 2.5 mu m) can be associated with the production of reactive oxygen species (ROS), among which hydroxyl radical (center dot OH) is the most reactive. However, center dot OH generated by PM2.5 has not been quantified and studied in the North China Plain (NCP), which has suffered from heavy air pollution in recent years. In this study, PM2.5 samples were collected at an urban site (Beijing) and a suburban site (Wangdu), extracted in a cell-free surrogate lung fluid (SLF), and center dot OH generated in the extracts were quantified. The results show that more center dot OH is produced on heavily polluted days than that on clean days (2.0 and 1.6 times higher in Beijing and Wangdu, respectively). The production of center dot OH per unit mass (ng/mu g center dot PM2.5) decreases with the increase of ambient PM2.5 concentration because SO42-, NO3-, and NH4+ dominate the increased PM2.5, while these secondary inorganic components do not contribute to the generation of center dot OH. Trace metals (e.g., Fe, Cu, Se) and carbonaceous species (organic carbon and elemental carbon) correlate well with the center dot OH production, indicating that particles from combustion sources including coal combustion, vehicle exhaust, and industry contribute more to center dot OH generation.

机译：周围PM2.5（d（p）<2.5μm）对健康的不利影响可能与活性氧（ROS）的产生有关，其中羟基（中心点OH）最具活性。然而，由PM2.5产生的中心点OH尚未在华北平原（NCP）进行定量和研究，该地区近年来遭受了严重的空气污染。在这项研究中，在城市站点（北京）和郊区站点（王都）收集了PM2.5样品，并用无细胞替代肺液（SLF）进行了提取，并对提取物中产生的中心点OH进行了定量。结果表明，在严重污染的日子里，中心点OH的产生要比干净的日子要多（北京和王都的分别高2.0和1.6倍）。随着环境PM2.5浓度的增加，每单位质量的中心点OH的生成量（ng /μg中心点PM2.5）降低，因为SO42-，NO3-和NH4 +主导了增加的PM2.5，而这些次生无机组分对中心点OH的生成没有贡献。痕量金属（例如，Fe，Cu，Se）和碳质物质（有机碳和元素碳）与中心点OH的产生密切相关，这表明来自燃烧源（包括煤炭燃烧，汽车尾气和工业）的颗粒对中心点的贡献更大。 OH生成。

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来源
《Environmental Science & Technology》 |2019年第1期|512-520|共9页
作者
Li Xiaoying; Kuang Xiaobi M.; Yan Caiqing; Ma Shexia; Paulson Suzanne E.; Zhu Tong; Zhang Yuanhang; Zheng Mei;
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作者单位

Peking Univ, Coll Environm Sci & Engn, SKL ESPC, Beijing 100871, Peoples R China|Peking Univ, Coll Environm Sci & Engn, BIC ESAT, Beijing 100871, Peoples R China;

Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA;

Peking Univ, Coll Environm Sci & Engn, SKL ESPC, Beijing 100871, Peoples R China|Peking Univ, Coll Environm Sci & Engn, BIC ESAT, Beijing 100871, Peoples R China;

Minist Environm Protect, South China Inst Environm Sci, Guangzhou 510655, Guangdong, Peoples R China;

Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA;

Peking Univ, Coll Environm Sci & Engn, SKL ESPC, Beijing 100871, Peoples R China|Peking Univ, Coll Environm Sci & Engn, BIC ESAT, Beijing 100871, Peoples R China;

Peking Univ, Coll Environm Sci & Engn, SKL ESPC, Beijing 100871, Peoples R China|Peking Univ, Coll Environm Sci & Engn, BIC ESAT, Beijing 100871, Peoples R China;

Peking Univ, Coll Environm Sci & Engn, SKL ESPC, Beijing 100871, Peoples R China|Peking Univ, Coll Environm Sci & Engn, BIC ESAT, Beijing 100871, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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专利

1. Pollutants from primary sources dominate the oxidative potential of water-soluble PM_(2.5) in Hong Kong in terms of dithiothreitol (DTT) consumption and hydroxyl radical production [J] . Cheng Yubo, Ma Yiqiu, Dong Biao, Journal of Hazardous Materials . 2021,第Mara5期

机译：来自主要来源的污染物在二硫代噻唑（DTT）消费和羟基自由基生产方面占据香港水溶性PM_（2.5）的氧化潜力
2. Spatial and temporal variability of PM_(2.5) and PM_(10) over the North China Plain and the Yangtze River Delta, China [J] . Jianlin Hu, Yungang Wang, Qi Ying, Atmospheric environment . 2014,第octa期

机译：华北平原和长三角地区PM_（2.5）和PM_（10）的时空变化
3. Hydroxyl Radical Generation from Environmentally Persistent Free Radicals (EPFRs) in PM_(2.5) [J] . William Gehling, Lavrent Khachatryan, Barry Dellinger Environmental Science & Technology . 2014,第8期

机译：在PM_（2.5）中由环境持久性自由基（EPFR）生成羟自由基
4. The characteristics of ammonia and the water-soluble ions in PM_(2.5) at a rural site in the North China Plain in summer 2013 [C] . Zhaoyang Meng, Xiaobin Xu, Jia shihui, Air and Waste Management Association annual conference and exhibition . 2015

机译：2013年夏季华北平原农村某地PM_（2.5）中氨和水溶性离子的特征
5. Oxidative damage to DNA: I. Isolation of proteins involved in the recognition of oxidatively damaged DNA. II. Development of next-generation hydroxyl radical footprinting. [D] . Xu, Long. 2009

机译：对DNA的氧化损伤：I.分离与识别氧化损伤的DNA有关的蛋白质。二。下一代羟基自由基足迹的发展。
6. Superoxide-dependent and ascorbate-dependent formation of hydroxyl radicals from hydrogen peroxide in the presence of iron. Are lactoferrin and transferrin promoters of hydroxyl-radical generation? [O] . O I Aruoma, B Halliwell 1987

机译：在铁存在下由过氧化氢形成羟基的超氧化物依赖性和抗坏血酸依赖性。乳铁蛋白和转铁蛋白是羟基自由基生成的促进剂吗？
7. Superoxide-dependent and ascorbate-dependent formation of hydroxyl radicals from hydrogen peroxide in the presence of iron. Are lactoferrin and transferrin promoters of hydroxyl-radical generation? [O] . Aruoma, O I, Halliwell, B 1987

机译：在铁存在下由过氧化氢形成羟基的超氧化物依赖性和抗坏血酸依赖性。乳铁蛋白和转铁蛋白是羟基自由基生成的促进剂吗？

Oxidative Potential by PM_(2.5) in the North China Plain: Generation of Hydroxyl Radical

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