Iron rich laterite soil with mesoporous structure for heterogeneous Fenton-like degradation of an azo dye under visible light

Treatment of CI. Acid Red 17 (AR17) by heterogeneous photo-Fenton-like process was studied using calcined laterite soil as an iron source. A complete characterization was performed to explain some of the properties of the used catalyst. Comparing the processes of heterogeneous Fenton-like and photo-Fenton-like, revealed that using heterogeneous photo-Fenton-like led to the highest decolorization efficiency (94.71% at 120 mm). Experimental results indicated that the heterogeneous photo-Fenton-like process could be explained in terms of the Langmuir-Hinshelwood kinetic model. The main roles of hydroxyl radicals in degradation process were investigated by adding of various radical scavengers. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.