宝鸡市区空气中PM_(10)、PM_(2.5)污染状况研究

目的研究宝鸡市城区采暖期和非采暖期PM10、PM2.5的质量浓度变化以及比例关系,为宝鸡的雾霾治理提供技术支撑。方法在宝鸡市环境监测中心站院子设点对PM10、PM2.5分别进行采暖期和非采暖期2个时段对比监测,结合气象条件进行分析,总结规律。结果在一般气象条件下PM2.5、PM10质量浓度采暖期高于非采暖期,昼间大于夜间,但细粒子在大气中漂浮时间长,昼夜变化幅度小于可吸入颗粒物。两种颗粒物浓度受气象条件影响较大,阴天浓度明显大于晴天。结论总结了不同时段PM10、PM2.5质量浓度和二者比例关系,为以后的研究和环境管理提供参考。

Research on PM10 and PM2.5 particle pollution in the urban air of Baoji

Objective--To provide technical support for the haze control of Baoji by studying the changes of PM10 and PM2.5 mass concentrations in the urban air of Baoji, Shaanxi, China during heating and non-heating periods and the proportion relationship of PM10 and PM2.5 Methods--The chan ges of PM10 and PM2.5 concentrations during heating and non-heating periods in Baoji City were determined by setting the observation point at Baoji Environmental Monitoring Center, then the comparison and analysis of the determined results during heating and non-heating periods were used to summarize the change characteristics of PM10 and PM2.5 concentrations in combination with meteorological conditions. Results--In general weather conditions, the concentrations of PM2.5 and PM2.5 during heating period are higher than those during non-heating period, and the concentrations in the day are higher than those at night as well, but the fine particles float for a longer time in the air, their changes in the day and at night are less than those of inhalable particulate matter. The particle concentrations of PM2. 5 and PM10 are greatly influenced by meteorological conditions, their concentrations in cloudy day is significantly greater than those in sunny day. Conclusion--The PM10 and PM2. 5 mass concentrations during heating and non-heating periods and their proportion relationship were summarized to provide reference for later research and Baoji City environmental management.