Reactions between the SO^{·-}_4 radical and some common anions in atmospheric aqueous droplets

Article type: Research Article

Authors: OUYANG, Bin | FANG, Hao-jie | ZHU, Cheng-zhu | DONG, Wen-bo | HOU, Hui-qi

Affiliations: Laser Flash Photolysis Laboratory, Institute of Environmental Science, Fudan University, Shanghai 200433, China

Note: [] Corresponding author. E-mail: fdesi@fudan.edu.cn

Abstract: The rate constants of reactions between the SO^{·-}_4 radical and some common anions in atmospheric aqueous droplets e.g. Cl^-, NO_3^-, HSO_3^- and HCO_3^- were determined using the laser flash photolysis technique. Absorption spectra of SO^{·-}_4 and the product radicals were also reported. The chloride ion was evaluated among all the anions to be the most efficient scavenger of SO^{·-}_4. The results may supply useful information for a better understanding of the vigorous radical-initiated reactions in atmospheric aqueous droplets such as clouds, rains or fogs.

Keywords: sulfate radical, common anions, atmospheric aqueous-phase chemistry, radical chemistry

Journal: Journal of Environmental Sciences, vol. 17, no. 5, pp. 786-788, 2005