Mechanistic study on photochemical generation of I/I radicals in coastal atmospheric aqueous aerosol.

The reactive iodine species may exhibit significant impacts on many global atmospheric issues and the I/I radicals play key roles for inducing the formation of these reactive iodine species. However, the current understanding on the formation of I/I radicals in atmospheric aqueous aerosol is still quite limited. The results reported herein suggest that I/I can be produced simultaneously in aqueous aerosol by several sunlight-driven photochemical pathways including direct photo-dissociation of soluble organic iodine (SOI) at rates of 0.