THE DEGRADATION OF REACTIVE BLACK 5 BY FENTON PROCESSS USING RAW IRON PYRITE ORE

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 1, 817-822 pp

ABSTRACT

This study examined the decolorization of one of the most commonly used reactive dye
by using the Fenton-like process [Iron pyrite/ H2O2]. Raw iron pyrite ore contains 28,68
% Fe. Oxidation experiments were run in 500 mL-glass beakers that were continuously
stirred for up to 180 min at a constant rate of 200 rpm, after initiation of the Fenton
process.

A series of experiments were carried out at various concentration of hydrogen peroxide
and raw iron pyrite ore while the pH value was kept constant at 3 in order to determine
the optimum conditions of these. From 50 mg/L to 750 mg/L of raw iron pyrite ore and
5 to 75 mg/L dosage of H2O2 were applied for the determination of operational
conditions. The decolorization of RB 5 was measured with UV-Vis spectrophotometer.
Manganese oxide (MnO2) was used for quenching H2O2 to prevent any interference
after sampling. It was found that optimum dosages of H2O2 and raw iron pyrite ore were
37,5 mg/L and 300 mg/L, respectively. At the optimum conditions color removal was
92,8 %. The experiments indicate that RB 5 can be effectively decolorized textile
effluent by Fenton like process which uses pyrite as the iron source.

Keywords: Fenton-like process, Raw iron pyrite, Color removal, Reactive black 5