标题: | 大气湿度及异常生成物对微粒手动采样器准确度的影响 The Effects of Humidity and Artifacts on the Accuracy of Maunal Pm Samplers |
作者: | 蔡春进 TSAI CHUEN - JINN 国立交通大学环境工程研究所 |
关键字: | 细微粒;奈米微粒;PM2;5 采样器;異常生成物;大气污染监测;fine particles;nanoparticles;PM2;5 sampler;artifact;monitoring of atmospheric pollutants |
公开日期: | 2014 |
摘要: | 我国环保署最近通过了 PM2.5 空气品质标准的修正草案,以确保国民健康。环保署 的空品测站使用贝他计或锥狀元件振荡天秤测量PM2.5 小时浓度值,然而本研究团队在 测站的比对结果发现,因大气湿度及微粒负荷于PM2.5 进口的冲击板上造成了自动监测 的浓度值比手动采样的值高估许多,其中手动采样的问题也包括进口分径器造成的质量 浓度误差,以及大气湿度、濾纸压损及濾纸调理过程造成的质量浓度误差,及无机盬類 及有机碳(OC)/元素碳(EC)異常生成物。为了充份了解并解决手动采样误差的问题,本计 画拟利用三年的时间,将一个本研究团队自行开发的多濾纸PM10-PM2.5 采样器加以改装 并加上进口的湿度调节,以連接不同的检测仪器,针对细微粒或奈米微粒的质量、无机 盬類及OC/EC 同时进行手动采样和即时监测,以探讨上述的问题。手动分析项目包括 濾纸秤重、水溶性離子的IC 化学分析及OC/EC 的TOR 分析,质量浓度的即时监测使 用FDMS 气胶质量浓度連续分析仪,无机气体及气胶的监测使用本研究团队自行研发的 平行平板湿式固气分離器或湿式静电集尘器和IC 的串聯系统,OC/EC 的监测则使用气 胶碳成分連续监测仪。预期本计画完成之后可厘清手动采样器的质量及成份的误差,并 提升细微粒及奈米微粒检测结果的正确性。 To better protection of public health, recently the Taiwan Environmental Protection Agency (EPA) promulgated the revised PM2.5 air quality draft standard. The beta gauge or taper element oscillating mass monitors are used in the EPA's air monitoring stations for measuring hourly PM2.5 concentrations. However, the recent comparison study at the air monitoring stations conducted by our research team found that the PM2.5 concentration of the real-time monitors exceeded those of manual samplers by a large extent due to the influence of the ambient relative humidity and the particle loading of the sampling inlets. In addition, the manual sampling problems include the errors of mass concentrations due to the sampling inlets, the effects of the ambient relative humidity, the pressure drop across the filter and filter conditioning procedure on the mass concentration errors and the artifact formation of inorganic soluble ions and organic carbon (OC)/elemental carbon (EC). This 3-year project is proposed to understand and resolve these sampling errors by using a multi-filter PM10-PM2.5 sampler designed by our research team, which will be modified for connecting to different detection instruments to enable the simultaneous manual sampling and real-time monitoring of fine and ultrafine particles. The analysis after manual sampling includes gravimetric analysis, IC analysis of water-soluble ions and Thermo-Optical Reflection (TOR) analysis of OC/EC. For real-time monitoring, a filter dynamic measurement system (FDMS) will be used to monitor the mass concentration, a parallel plate wet denuder (PPWD) or a wet electrostatic precipitator (WetESP) connected with an IC (PPWD or WetESP+IC) designed by our research team will be used to monitor the inorganic gases or aerosols, respectively, and the SunSet Laboratory OCEC Analyzer will be used to monitor the OC/EC. It is expected that the errors of mass and chemical species will be clarified after the completion of this project and the sampling and monitoring accuracy of fine and nanoparticles will be much better improved. |
官方说明文件#: | NSC101-2221-E009-066-MY3 |
URI: | http://hdl.handle.net/11536/98757 https://www.grb.gov.tw/search/planDetail?id=8118682&docId=431848 |
显示于类别: | Research Plans |