大气颗粒物中水溶性离子的在线捕集与提取装置

Online Capture and Extraction Device for Water-Soluble Ions in Atmospheric Particulate Matter

大气颗粒物对空气质量、人体健康和气候变化有重要影响.水溶性离子是其重要组成部分,监测其浓度变化对于大气污染治理至关重要.但在一些采样环境艰苦的背景区域,需要稳定环境、充足电力和水源保障的在线离子分析仪很难满足监测需求.为了在小体积、低能耗条件下实现大气颗粒物中水溶性离子的高时频在线捕集和前处理,自主研发了一种基于膜累积采样法的系统和装置.该装置实现了样品采集和前处理的自动化、连续化,操作简单,制备高效,并对环境条件要求低.通过该装置,可以获得水溶性离子组分浓度的高时频变化规律,对于认识污染进程中排放源贡献和形成机制具有重要作用.

Atmospheric particulate matter has a significant effect on air quality,human health,and climate change.Water-soluble ions are an important component of atmospheric particulate matter,and monitoring their concentration changes is crucial for air pollution control.However,in some challenging sampling environments,it is difficult to meet the monitoring requirements with stable environmental conditions,sufficient power supply,and water source guarantee for online ion analysers.In order to achieve high-frequency online capture and pre-treatment of water-soluble ions in atmospheric particulate matter under the condition of small volume and low energy consumption,a device based on membrane accumulation sampling have been independently developed.The device realizes automatic and continuous sample collection and pre-treatment,is easy to operate,efficient,and has low environmental requirements.Through the device,the high-frequency variations in the concentration of water-soluble ion components can be obtained,which plays an important role in understanding the contribution of emission sources and formation mechanisms of emission sources in the pollution process.