Department of Chemical Engineering, National Chen-Kung University, Tainan City 70101, Taiwan.
Water Environ Res. 2013 Apr;85(4):340-5. doi: 10.2175/106143012x13503213812643.
The heterogeneous oxidation of azo dye Reactive Black B (RBB) by the photo-Fenton system catalyzed with an immobilized iron oxide, B1 (supported with SiO2 grain), was investigated. Reactive Black B oxidation was carried out in an expended-bed reactor in which the effect of B1 dosage on the decolorization and degradation of RBB was examined. Through pseudo-first-order kinetic studies, decolorization was found to be faster than degradation with a fixed rate constant ratio. By determining the iron dissolution from B1, RBB oxidation was supposed to mainly occur on the B1 surface, which catalyzed the generation of hydroxyl radicals in the photo-Fenton reaction. Accordingly, the efficiency of photo-Fenton could reach 100% and 91.2% of decolorization and degradation, respectively, in 300 minutes.
用固定化氧化铁 B1（负载在 SiO2 颗粒上）作为催化剂的光芬顿体系对偶氮染料活性黑 B（RBB）的多相氧化进行了研究。在扩展床反应器中进行活性黑 B 的氧化实验，考察了 B1 用量对 RBB 脱色和降解的影响。通过准一级动力学研究发现，脱色比降解快，且固定速率常数比。通过测定 B1 中的铁溶解量，推测 RBB 的氧化主要发生在 B1 表面，该表面催化了光芬顿反应中羟基自由基的生成。因此，在 300 分钟内，光芬顿的效率分别达到了 100%和 91.2%的脱色和降解。
