Abstract:Determining the optimal concentrations of denuder coatings is necessary before sampling PM2.5 using denuder sampling system at a specific time and location. In order to determine the optimum sampling condition of a PM2.5 sampling system with honeycomb denuder in winter in Tianjin, the experiments for optimizing the concentrations of honeycomb denuder coatings were carried out from January 1 to February 24, 2014 at the roof of Lihua building at Nankai University. The results of the experiment showed that the optimal concentration of sodium carbonate coated on the honeycomb denuder was 4%, and the optimal concentration of citric acid was 5% in winter in Tianjin; the impact of HCl in ambient air on concentration of Cl- in PM2.5 was relatively small; while acidic/alkalic gases such as HNO3、SO2、NH3 had significant impacts on the concentrations of ions in PM2.5, respectively.
张诗建, 姬亚芹, 朱振宇, 杨文. 天津市冬季蜂窝状溶蚀器涂层溶液最适浓度研究[J]. 中国环境科学, 2015, 35(3): 723-727.
ZHANG Shi-Jian, JI Ya-Qin, ZHU Zhen-Yu, YANG Wen. Determining the optimal concentration of coating solution attaching to honeycomb denuder in winter in Tianjin. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(3): 723-727.