摘要
为考察不同浓度、湿度、酸度CaCl2气溶胶对SOA生成的影响,使用体积为0.175 m^3的自制烟雾箱进行了单因素影响实验和正交实验。结果显示:CaCl2气溶胶阻碍C4H6O2光氧化生成SOA,阻碍程度随浓度(0~80.17 mg/m^3)的升高而增大。高湿度(湿度>63.5%)CaCl2气溶胶阻碍SOA生成,极低湿度(湿度<2.7%)条件下SOA几乎不生成。CaCl2气溶胶过酸(pH值<5.9)或过碱(pH值>9.1)均会降低SOA生成潜势,与之相比,弱酸性或中性(pH值≈6.9)有利于SOA生成。CaCl2气溶胶酸度对SOA生成的影响最强,湿度最弱。
In order to investigate the influence of CaCl2 aerosol with different concentration,humidity and acidity on SOA generation,single-factor influence experiment and orthogonal experiment were conducted using a self-made smoke box with volume of 0.175 m^3.The results show that CaCl2 aerosol hindered the formation of SOA by photooxidation of C4H6O2,and the degree of hindrance increased with the increase of concentration(0~80.17 mg/m^3).High humidity CaCl2 aerosol(>63.5%)hindered the generation of SOA,and very low humidity(<2.7%)almost no SOA was generated.Compared with CaCl2 aerosol acid(pH<5.9)or alkali(pH>,9.1),weak acid or neutral(pH≈6.9)are beneficial to SOA generation.The influence of CaCl2 aerosol acidity on SOA generation is the strongest and the humidity is the weakest.
作者
康艺馨
杨智博
Kang Yixin;Yang Zhibo(College of Forestry,Beijing Forestry University,Beijing 100083,China;Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei 050018,China)
出处
《河北环境工程学院学报》
CAS
2020年第6期15-21,共7页
Journal of Hebei University of Environmental Engineering
关键词
氯化钙
二次有机气溶胶
乙酸乙烯酯
烟雾箱
calcium chloride
secondary organic aerosol
vinyl acetate
smog chamber
