在轮胎模拟器上生成的细轮胎磨损颗粒的化学特性
Quanyou Guo1, Zhengyu Men1, Zhenguo Liu2
1Tianjin Key Laboratory of Urban Transport Emission Research & State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
Environmental pollution (Barking, Essex : 1987)
|September 1, 2023
概括
轮胎磨损颗粒 (TWPs) 是交通排放的重要来源. 这项研究详细介绍了TWP的化学成分,发现有机碳占主导地位,并确定了关键元素和离子,提供了来源概况.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 材料科学 材料科学 材料科学
背景情况:
- 轮胎磨损颗粒 (TWPs) 是交通相关颗粒排放的主要原因之一,但关于其化学成分的详细实验室数据仍然很少.
- 了解TWPs的化学成分对于评估它们对环境的影响和制定减缓策略至关重要.
研究的目的:
- 为了全面描述由轮胎磨损产生的PM2.5的化学成分.
- 调查轮胎类型和速度等级对TWP组成的影响.
- 为改进排放清单和来源分配研究构建TWP源档案.
主要方法:
- 在十个轮胎品牌的轮胎磨损测试中,使用轮胎模拟器在受控室进行了磨损测试.
- PM2.5的化学表征包括无机元素,水溶性离子 (WSIs),有机碳 (OC),元素碳 (EC) 和多环芳 (PAHs).
- 分析化学成分和轮胎参数 (类型,速度等级) 之间的关系.
主要成果:
- 有机碳 (OC) 占PM2.5质量的最大部分 (44.0 ± 0.9%),其次是元素碳 (EC) (9.6 ± 2.3%).
- 主要的无机元素是 (Si) 和 (Zn),而硫酸盐 (SO4^2-) 和酸盐 (NO3^-) 是主要离子,表明酸性TWPs.
- 多环芳 (PAHs) 含量为113±45.0μg g^-1,其中烯是主要的化合物.
- 与冬季轮胎相比,全季轮胎的无机元素和WSI较高,但PAHs较低.
- 增加轮胎速度等级与更高的OC,Si和 (Al) 含量相关,但降低了PAHs.
结论:
- 本研究提供了TWPs的详细化学概况,突出了OC的重要贡献,并确定了关键的无机和有机成分.
- 轮胎类型和转速等级显著影响TWP的化学成分,这对排放量库存有影响.
- 构建的TWP源资料为大气化学研究和环境管理提供了有价值的数据.
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