Luo Lisha, Zou Donglei, Lu Dongwei, Xin Bingjing, Zhou Ming, Zhai Xuedong, Ma Jun
Key Laboratory of Ministry of Education for Groundwater Resources and Environment, College of New Energy and Environment, Jilin University Changchun 130000 P. R. China.
Jilin Institute of Chemical Technology Jilin 130022 P. R. China.
RSC Adv. 2018 Oct 1;8(58):33534-33541. doi: 10.1039/c8ra06880a. eCollection 2018 Sep 24.
Manganese modified silicate ore (MnSO) prepared using an impregnation method was used as a heterogeneous ozonation catalyst, and the catalytic activity was evaluated by the degradation of ciprofloxacin (CIP). The results showed that the manganese oxide was successfully loaded onto natural silicate ore (SO). The degradation and mineralization efficiencies of CIP were considerably improved in the presence of MnSO. Under optimal conditions, the CIP removal process followed the pseudo-first-order reaction model well. The degradation rate constant of MnSO/O was 1.7 times and 3.3 times higher than those of SO/O and only O, respectively. During the ozonation of the CIP aqueous solution in the presence of MnSO, the TOC removal rate reached 61.2% at 60 min, but was only 30.8% using ozonation alone. The addition of -butanol (TBA) significantly inhibited the degradation efficiency of CIP, which indicated that catalytic ozonation of MnSO followed a hydroxyl radical (·OH) reaction mechanism. Furthermore, MnSO showed great stability and durability over several reaction cycles.
采用浸渍法制备的锰改性硅酸盐矿石（MnSO）作为非均相臭氧化催化剂，并通过环丙沙星（CIP）的降解来评估其催化活性。结果表明，氧化锰成功负载在天然硅酸盐矿石（SO）上。在MnSO存在下，CIP的降解和矿化效率显著提高。在最佳条件下，CIP去除过程很好地遵循了准一级反应模型。MnSO/O的降解速率常数分别比SO/O和仅臭氧氧化时高1.7倍和3.3倍。在MnSO存在下对CIP水溶液进行臭氧化时，60分钟时TOC去除率达到61.2%，但单独使用臭氧氧化时仅为30.8%。添加叔丁醇（TBA）显著抑制了CIP的降解效率，这表明MnSO的催化臭氧化遵循羟基自由基（·OH）反应机理。此外，MnSO在几个反应循环中表现出很高的稳定性和耐久性。
