Kusić Hrvoje, Koprivanac Natalija, Selanec Iva
Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, Zagreb 10000, Croatia.
Chemosphere. 2006 Sep;65(1):65-73. doi: 10.1016/j.chemosphere.2006.02.053. Epub 2006 Apr 5.
The issue of investigations in this study was an application of heterogeneous Fenton-type catalyst, Fe-exchanged zeolite FeZSM5, for the minimization of phenol and overall organic content in the model wastewater. Applied treatment systems included variation of heterogeneous and homogeneous Fenton-type catalyst with and without the assistance of UV irradiation, FeZSM5/H2O2, Fe2+/H2O2/NH4ZSM5, Fe3+/H2O2/NH4ZSM5, UV/FeZSM5/H2O2, UV/Fe2+/H2O2/NH4ZSM5 and UV/Fe3+/H2O2/NH4ZSM5. Processes efficiency was evaluated on the basis of phenol removal, mineralization extent, H2O2 consumption and concentration of iron ions in the bulk after the treatment. By all applied systems, complete phenol removal was achieved in less than 30 min of treatment time. Systems including heterogeneous Fenton-type catalyst showed somewhat lower mineralization efficiency in comparison to the corresponding systems applying homogeneous Fenton-type catalysts and the addition of synthetic zeolite NH4ZSM5. Significantly lower concentration of iron ions in the bulk after the treatment could give these systems, particularly UV/FeZSM5/H2O2, a great advantage over the homogeneous Fenton-type systems.
本研究中的调查问题是应用非均相芬顿型催化剂铁交换沸石FeZSM5，以降低模拟废水中苯酚和总有机含量。应用的处理系统包括在有无紫外线照射辅助下，非均相和均相芬顿型催化剂的变化，即FeZSM5/H2O2、Fe2+/H2O2/NH4ZSM5、Fe3+/H2O2/NH4ZSM5、UV/FeZSM5/H2O2、UV/Fe2+/H2O2/NH4ZSM5和UV/Fe3+/H2O2/NH4ZSM5。根据苯酚去除率、矿化程度、H2O2消耗量以及处理后主体中铁离子的浓度来评估处理过程的效率。通过所有应用系统，在不到30分钟的处理时间内实现了苯酚的完全去除。与应用均相芬顿型催化剂及添加合成沸石NH4ZSM5的相应系统相比，包括非均相芬顿型催化剂的系统显示出略低的矿化效率。处理后主体中铁离子浓度显著降低，这使得这些系统，特别是UV/FeZSM5/H2O2，比均相芬顿型系统具有很大优势。
