Yao H, Lu W, Niu G, Zhang Q, Jiang Q, Liu H, Ni T
School of Geography, Nantong University, Nantong, 226019 China.
Jiangsu Yangtze River Economic Belt Research Institute, Nantong, 226019 China.
Int J Environ Sci Technol (Tehran). 2021;18(7):2053-2062. doi: 10.1007/s13762-021-03311-4. Epub 2021 Apr 13.
With the rapid development of industrialization and urbanization in China, energy and vehicle consumption have continued to increase in recent years and air pollution has become serious In early 2020, Corona Virus Disease 2019 broke out in Wuhan, China. From January 29, 2020, several sources of the air pollution almost all stopped working, including gasoline burning vehicles, dust producing building sites, coal-fired factories, etc. Five indicators of the atmospheric environmental quality were observed from December 19, 2019 to April 30, 2020 in nine cities and 1-h average concentrations, 24-h average concentrations and Air Quality Index were assessed. The 1-h average concentrations of the nitrogen dioxide, the ozone and the sulfur dioxide showed obvious difference though the closure did not change the sequence of the five pollutants' concentrations in the air at diverse sampling moments. The changing of the 24-h average concentrations of the five pollutants indicated the amount of pollutants in the air were greatly affected by human activities. The nitrogen dioxide, the sulfur dioxide and the particulate matters decreased obviously in the closure. The air in the metropolis and the south-east cities were relatively clean and the pollutants' concentrations decreased slightly during the closure period. The northern and the heavy industrial cities showed significant drop on air pollution indicators and the air quality of the two city groups could be greatly improved if some effective measures could be taken of environmental management and regional development.
随着中国工业化和城市化的快速发展，近年来能源和车辆消费持续增长，空气污染日益严重。2020年初，新型冠状病毒肺炎在中国武汉爆发。自2020年1月29日起，包括汽油燃烧车辆、产生扬尘的建筑工地、燃煤工厂等在内的多个空气污染源头几乎全部停止运行。在2019年12月19日至2020年4月30日期间，对九个城市的大气环境质量的五个指标进行了观测，并评估了1小时平均浓度、24小时平均浓度和空气质量指数。尽管污染源关闭并没有改变不同采样时刻空气中五种污染物浓度的排序，但二氧化氮、臭氧和二氧化硫的1小时平均浓度仍呈现出明显差异。五种污染物24小时平均浓度的变化表明空气中污染物的含量受人类活动影响很大。污染源关闭期间，二氧化氮、二氧化硫和颗粒物明显减少。大城市和东南部城市的空气相对清洁，在污染源关闭期间污染物浓度略有下降。北方和重工业城市的空气污染指标显著下降，如果能采取一些有效的环境管理和区域发展措施，这两个城市群的空气质量有望得到极大改善。
