新疆环境保护2024，Vol.46Issue(2)：26-30,5.
泸州环境空气自动监测PM2.5和PM10质量浓度"倒挂"现象及原因分析
Analysis on Reversal Phenomenon and Cause of Automatic Monitoring of PM2.5 and PM10 Mass Concentrations in the Ambient Air in Luzhou
薛京洲 1王旭阳 1李小宇1
作者信息
- 1. 四川省泸州生态环境监测中心站,四川 泸州 646000
- 折叠
摘要
Abstract
Based on the the data of PM10,PM2.5,temperature and humidity from four national control points in Luzhou City in 2022,the Reversal phenomenon of PM2.5 and PM10 mass concentrations in different months,different particle concentration ranges,and different temperatures and humidity was analyzed.The results showed that there were Reversal phenomenons of PM2.5 and PM10 concentrations in all four national control points.Among them,the hourly values of the national control point at the Xiaoshishangmatou continuously had appeared Reversal from January to February.This phenomenon was related to the system error of the monitoring equipment and the factors such as temperature and humidity,and was also related to the abnormality of the PM2.5 instrument's dynamic heating system and inadequate maintenance.This abnormal Reversal was difficult to find during inspections and quality control,but it can be indirectly judged through data comparison between points.So the monitoring backup machine can be repaired or replaced in time.The daily average value of the national control point of the Naxi District Environmental Protection Bureau has not appeared Reversal,but the Reversal rate of hourly value was as high as 9.3%.The operating status of the dynamic heating system,daily inspection and maintenance and sample flow calibration should been focused to mitigate the effects of system errors at low concentrations.关键词
PM2.5/PM10/"倒挂"现象/环境空气自动监测Key words
PM2.5/PM10/reversal phenomenon/automatic monitoring of ambient air分类
资源环境引用本文复制引用
薛京洲,王旭阳,李小宇..泸州环境空气自动监测PM2.5和PM10质量浓度"倒挂"现象及原因分析[J].新疆环境保护,2024,46(2):26-30,5.
