COVID-19 lockdown and particle exposure of road users,Journal of Transport & Health

当前位置： X-MOL 学术 › J. Transp. Health › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

COVID-19 lockdown and particle exposure of road users
Journal of Transport & Health ( IF 3.2 ) Pub Date : 2021-08-20 , DOI: 10.1016/j.jth.2021.101233
Bernard Polednik ₁

Affiliation

Introduction

In 2020, due to the outbreak of COVID-19, there has been an unprecedented decrease in road traffic in almost all urbanized areas around the globe. This has undoubtedly affected the ambient air quality.

Methods

In this study mobile and fixed-site measurements of aerosol particle concentrations in the ambient air in one of the busiest streets in Lublin, a mid-sized city in Central Europe (Poland) during the COVID-19 lockdown in the spring of 2020 were performed. Based on the measurements particle doses received by road users during different times of the day were assessed. The obtained results were compared with corresponding pre-COVID-19 measurements also performed in the spring which were available only from 2017.

Results

During lockdown the mass concentration of traffic-related submicrometer PM₁ particles and number concentration of ultrafine PN_0.1 particles was significantly reduced. This resulted in a decrease of doses inhaled by road users as well as of particle doses deposited in their respiratory tracks. The greatest reductions of respectively over 2 times and over 5 times were observed during the day for total particles and traffic-related particles. Smaller reductions indicating the existence of relatively intensive non-traffic emissions were reported at night.

Conclusions

Substantial decrease in traffic intensity in the city caused by lockdown restrictions resulted in a significant reduction in the concentration of vehicle-generated particles in the ambient air. This in turn could have resulted in smaller doses inhaled by the inhabitants, specifically road users, which should have a positive impact on their health.

中文翻译：

COVID-19 封锁和道路使用者的颗粒暴露

介绍

2020年，由于COVID-19的爆发，全球几乎所有城市化地区的道路交通都出现了前所未有的减少。这无疑影响了环境空气质量。

方法

在这项研究中，对 2020 年春季 COVID-19 封锁期间中欧（波兰）中型城市卢布林最繁忙的街道之一的环境空气中气溶胶颗粒浓度进行了移动和固定测量。根据测量结果，评估了道路使用者在一天中不同时间接收到的颗粒剂量。将获得的结果与同样在春季进行的相应的 COVID-19 之前的测量结果进行了比较，这些测量结果仅从 2017 年开始提供。