Abstract
The decomposition of CF(3)CH(2)CH(2)Si-(OMe)(3) and C(4)F(9)CH(2)CH(2)Si-(OMe)(3)typical fluorinated silane coupling agents used for surface modificationwas investigated in subcritical water for potential waste treatment applications. When CF(3)CH(2)CH(2)Si-(OMe)(3) was heated in subcritical water with no additive at 350 °C, only a small amount of fluoride (F(-)) was produced. In contrast, virtually complete mineralization of CF(3)CH(2)CH(2)Si-(OMe)(3) was achieved in the presence of KMnO(4). Specifically, after treatment with 0.50 mmol of KMnO(4) for 6 h, the F(-) yield reached 100%, and the residual total organic carbon in the reaction solution was reduced to 4% of the initial carbon content of CF(3)CH(2)CH(2)Si-(OMe)(3). Furthermore, under the same reaction conditions, quasi-complete mineralization of C(4)F(9)CH(2)CH(2)Si-(OMe)(3) was also attained, with an F(-) yield of 96% and a remaining TOC ratio of 2%.