Scholarlink

<p>The uptake coefficients of nitrogen dioxide (NO<sub>2</sub>), ozone (O<sub>3</sub>), formaldehyde (HCHO), and methanol (CH<sub>3</sub>OH) were determined on both weathered (real-world) and non-weathered asphalt pavements. Steady-state uptake coefficients of NO<sub>2</sub> and O<sub>3</sub> were significantly higher on aged asphalt surfaces, with values of 3.5 × 10<sup>−5</sup> and 2 × 10<sup>−4</sup>, respectively, based on geometric surface. To evaluate the impact on urban air quality, zero-dimensional (0-D) model simulations were conducted incorporating heterogeneous loss on asphalt pavements. The simulations revealed that pollutants heterogeneous loss influenced OH and NO<sub>3</sub> radical levels, thereby altering the oxidative capacity of urban atmospheres. Including O<sub>3</sub> reactivity on asphalt surfaces led to a 40% increase in nitric oxide (NO) concentrations, addressing a long-standing discrepancy in air quality models that have struggled to reproduce urban NOx levels for decades. Furthermore, during nighttime, the heterogeneous reactivity of NO<sub>2</sub> and O<sub>3</sub> on asphalt accounted for over 90% of dry deposition. These findings demonstrate the need to account the heterogeneous loss of pollutants on impervious urban surfaces and highlight critical gaps in understanding urban chemical processes, particularly their role in nighttime atmospheric chemistry.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Uptake of atmospheric pollutants on road asphalt pavements: an underestimated sink in urban environments

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月14日

查看全文
  • M. J. Rossi,
  • A. Gandolfo,
  • A. Lostier,
  • A. Roose,
  • C. George,
  • T. Salameh,
  • F. Thevenet,
  • H. Chen,
  • Manolis N. Romanias

摘要

The uptake coefficients of nitrogen dioxide (NO2), ozone (O3), formaldehyde (HCHO), and methanol (CH3OH) were determined on both weathered (real-world) and non-weathered asphalt pavements. Steady-state uptake coefficients of NO2 and O3 were significantly higher on aged asphalt surfaces, with values of 3.5 × 10−5 and 2 × 10−4, respectively, based on geometric surface. To evaluate the impact on urban air quality, zero-dimensional (0-D) model simulations were conducted incorporating heterogeneous loss on asphalt pavements. The simulations revealed that pollutants heterogeneous loss influenced OH and NO3 radical levels, thereby altering the oxidative capacity of urban atmospheres. Including O3 reactivity on asphalt surfaces led to a 40% increase in nitric oxide (NO) concentrations, addressing a long-standing discrepancy in air quality models that have struggled to reproduce urban NOx levels for decades. Furthermore, during nighttime, the heterogeneous reactivity of NO2 and O3 on asphalt accounted for over 90% of dry deposition. These findings demonstrate the need to account the heterogeneous loss of pollutants on impervious urban surfaces and highlight critical gaps in understanding urban chemical processes, particularly their role in nighttime atmospheric chemistry.