摘要：The photolysis of trichlorofluoromethane (F-11) and dichlorodifluoromethane (F-12) in distilledor sea-water was investigated. The aqueous solutions of F-11 (245, 446 ppt) and F-12 (467, 678 ppt) were subjected to photolysis by a xenon lamp or under the sunlight and the amount of the remaining fluorocarbons was analyzed with ECD-GLC using the head space technique. When F-11 or F-12 in distilled-water was irradiated by a xenon lamp, 41% and 20% of them respectively were lost after 8h. The decomposition of the fluorocarbons in sea-water proceeded more efficiently, and approximately 63% of both F-11 and F-12 were lost by the irradiation with a xenon lamp. Under the sunlight, however, both fluorocarbons decomposed so slow that the loss of only 8% of F-11 in seawater was observed under the same experimental conditions for 4 weeks, whereas no significant decrease of F-11 and F-12 in distilled-water was observed during the experiment of 4 weeks.
