郑州市2017年大气污染物特征分析

The Characteristics of Air Pollutants in Zhengzhou in 2017

根据郑州市2017年全年主要大气污染物的在线监测数据,分析了各主要大气污染物的年浓度水平、季节变化特征、日变化特征及其形成原因.结果表明:郑州市2017年大气污染物以颗粒污染物为主,PM2.5和PM10年均质量浓度分别是72.0μg·m^-3和132.7μg·m^-3,分别是国家空气质量年均二级标准的2.1倍和1.9倍.利用特征比值分析发现空气污染越严重,由二次污染形成的细颗粒污染物对大气污染的贡献越大.各主要大气污染物受到当地污染排放、气象条件及光化学反应的共同影响,在季节和日变化规律上存在显著的差异.本研究可以为郑州市大气污染防治提供理论支持.

Based on the online monitoring data of main air pollutants in Zhengzhou during 2017,the annual concentration levels,seasonal variation characteristics and daily variation characteristics of each major air pollutant and the formation reasons were analyzed.Results of the analysis indicated that particulate pollutants were the main air pollutants,the annual average mass concentrations of PM2.5 and PM10 were 72.0μg·m^-3 and 132.7μg·m^-3,which were 2.1 times and 1.9 times of the national air quality secondary standard,respectively.By using the characteristic ratio analysis,it was found that the more serious the air pollution was,the greater the contribution of fine particle pollutants formed by secondary pollution to the air pollution was.The main atmospheric pollutants were jointly affected by local pollutant emissions,meteorological conditions and photochemical reactions,and there were significant differences in seasonal and daily variation of these pollutants.This study can provide theoretical support for the prevention and control of air pollution in Zhengzhou.