Degradation of CI Reactive Red 141 by heterogeneous Fenton‐like process over iron‐containing ZSM‐5 zeolites. (16th November 2012)

• Record Type: Journal Article
• Authors: Yaman, Yadigar C; Gündüz, Gönül; Dükkancı, Meral
• Is Part Of: Coloration technology. Volume 129:Number 1(2013)
• Page Start: 69
• Page End: 75
• Publication Date: 2012-11-16
• Subjects: Color -- Periodicals; Color in the textile industries -- Periodicals; Dyes and dyeing -- Periodicals; 667
• DOI: 10.1111/cote.12001
• Languages: English
• ISSNs: 1472-3581

Abstract

<abstract abstract-type="main" id="cote12001-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The Fenton‐like oxidation of CI Reactive Red 141 was investigated over iron‐containing ZSM‐5 zeolites. Iron was loaded by ion exchange or through hydrothermal synthesis. The oxidation process was carried out in an aqueous solution using hydrogen peroxide as the oxidant. The catalyst prepared by ion exchange with a silicon/aluminium ratio of 42 zeolite showed the highest activity (97% decolorisation and 52% chemical oxygen demand reduction at an initial pH of 3.5) after an oxidation duration of 2 h. The chemical oxygen demand reduction increased with the increasing amount of iron loaded to the zeolite. The FeZSM‐5 catalyst, prepared by hydrothermal synthesis in the presence of oxalic acid, showed very good activity in terms of mineralisation (99% of chemical oxygen demand reduction). The iron leaching was noticeably low (below the European Union directives of 2 mg dm⁻³) for the above‐mentioned catalysts.</p> </abstract>