几种水溶性化合物对印染废水中活性艳红K-2BP光解的影响

Effects of several dissolved compounds on photolysis of reactive brilliant red K-2BP

通过添加NO3-、Fe3+、H2O2三种水溶性化合物研究了水溶性化合物在汞灯照射下对活性艳红K-2BP模拟染料废水降解效果的影响.结果表明:紫外光解可以将K-2BP完全矿化,不生成二次污染物;K-2BP的光解符合一级反应动力学.三种水溶性化合物尤其是Fe3+与H2O2的添加对染料的光解有非常显著的促进作用.随着添加浓度的增加,光解促进率明显增大;其促进机制可能是通过充当氧化剂或催化剂吸收紫外辐射后生成强氧化性的.OH自由基引发化学反应使K-2BP氧化分解.

Effects of several compounds in environment on the photolysis under irradiation of mercury lamp were evaluated by using reactive brilliant red K-2BP as a representative dye wastewater.The results showed that K-2BP the photolysis of K-2BP followed first-order kinetics well.The presence of NO3- had the fairly marked arLxo-action on the photolysis of K-2BP,and the anxo-action increased with increasing of NO3- concentration.And the presence of Fe3＋ and H2O2 had the extreme marked anxo-action on the photolysis of K-2BP.The promoting efficiency was apparently enhanced with increasing the concentration of Fe3 ＋or H2O2.The mechanism is probably that these compounds act as oxidizer or catalyst absorbing ultraviolet radiation to be produced strong oxidation. OH free radical to solicit the chemical reaction to make the dye oxidized and resolved.