铁-草酸盐配合物光催化降解对苯二酚的研究

Study on Degradation of Hydroquinone Induced by Photolysis of Fe(Ⅲ)-oxalate Complexes

Fe(Ⅲ)-草酸盐配合物在光照条件下,能产生有活性的强氧化剂H2O2和OH自由基以氧化水中的有机化合物.研究了在高压汞灯(λ≥300nm)照射下,对苯二酚在Fe(Ⅲ)-草酸盐配合物体系中的光催化降解.结果表明:溶液pH值、对苯二酚初始浓度、铁与草酸盐浓度比和光照强度均对降解结果产生影响.在pH=4.0,Fe(Ⅲ)溶液浓度为10.0μmol/L,草酸盐浓度为100.0μmol/L的实验条件下,10.0mg/L的对苯二酚的降解率为99.0%.

The photolysis of Fe（Ⅲ）-oxalate complexes can produce active oxidant H2O2 and · OH radicals, which can oxidize organic compounds in water. Fe（Ⅲ）-oxalate complex and its photochemical reactions were applied to exploratory research on waste water treatment. The experiment ofphotodegradation of the hydroquinone was conducted in the aqueous solution containing Fe （Ⅲ）-oxalate complex irradiated with UV-Vis （λ ≥ 300 nm）. The results showed that photoreduction of hydroquinone was affected by the pH value, initial concentration of hydroquinone Fe（Ⅲ） and ratio of Fe（Ⅲ） to oxalate. The photoderadation efficiency of hydroquinone increased to 99.0% at the following conditions： pH=4.0, CFe（Ⅲ） = 10 μmol/L, and Coxalate： 100μmol/L.