KINETICS OF THE TREATMENT OF ORGANIC DYE  BASED ON MODIFIED RED MUD

Dang The Anh; Vu Huy Dinh; Nguyen Thi Van Anh; Dao Sy Duc; Do Quang Trung

Authors

Dang The Anh Vietnam National University of Forestry
Vu Huy Dinh Vietnam National University of Forestry
Nguyen Thi Van Anh Hanoi University of Science
Dao Sy Duc Hanoi University of Science
Do Quang Trung 5Hanoi University of Science

Keywords:

Catalyst, Heterogeneous Fenton, Reactive Yellow 160, Red mud

Abstract

In this paper, red mud denatured by Iron (III) sulfate is used for researching decomposition reaction kinetics of Reactive Yellow 160 (RY 160) dye using Heterogeneous Fenton Technique. Basic characteristics of red mud before and after denaturation are determined through scanning electron micrograph (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX). In the appropriate conditions on catalyst content (1.5 g/L), hydrogen peroxide content (2.29 mM), pH = 2, with more than 99.2% of RY 160 dye is eliminated at 30°C with a rate constant of 0.0383 min^-1(R² = 0.9939); surveying temperature in the range of 30°C - 50°C, the reaction follows first order kinetics with activation energy 31.9 kJ/mol (R² = 0.9804); surveying catalyst content, the largest rate constant is k = 0.0381 min^-1 with catalyst content of 1.5 g/L; surveying hydrogen peroxide content, the largest rate constant is k = 0.0367 min^-1 with hydrogen peroxide concentration of 2.29 mM; surveying pH, the largest rate constant is k = 0.0391 min^-1 at pH = 2.