Effect of Hâ‚‚Oâ‚‚ concentration and solution pH on the degradation of methyl orange by TIOâ‚‚/Hâ‚‚Oâ‚‚/UV system

Chong, Sow Ling (2005) Effect of Hâ‚‚Oâ‚‚ concentration and solution pH on the degradation of methyl orange by TIOâ‚‚/Hâ‚‚Oâ‚‚/UV system. Universiti Malaysia Sabah. (Unpublished)

[img]
Preview
Text
ae0000002504.pdf

Download (11MB) | Preview

Abstract

The study described herein is an investigation of the treatability of a commonly used azo dye in the textile dyeing and finishing operations, Methyl Orange (MO), by TiO₂/H₂O₂/UV system. It focused on the photocatalytic degradation process, where the effects of various H₂O₂ concentrations (i.e. 5 x l0��, l x 1O��, 5 x 10��, 1 x 10�³,5 x 10�³ mol/L and at the absence of H₂O₂ and solution pH (at pH 2, 5.3, 9 and 11) were examined using a cylindrical photoreactor of 400-mL capacity and UV-A (320-400 nm) lamp. The degradation process was monitored by measuring the absorbance value at 465nm. The addition of H₂O₂ in the TiO₂/UV system (as TiO₂/H₂O₂/UV system) has apparently improving the degradation rate of MO solution, however it was detriment by the addition of excess H₂O₂ more than 1 x 10�³ mol/L. Kinetic analysis of MO photodegradation is pseudo-first-order reaction according to Langmuir-Hinshelwood model, with rate constant of decoluorisation, kAbs in the range of 0.0017 and 0.0165 min�¹.

Item Type: Academic Exercise
Uncontrolled Keywords: treatability, azo dye, textile dyeing, Methyl Orange, photocatalytic, degradation process, Langmuir-Hinshelwood model,pseudo-first-order
Subjects: T Technology > TP Chemical technology
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 06 Feb 2015 01:26
Last Modified: 24 Oct 2017 06:05
URI: http://eprints.ums.edu.my/id/eprint/10462

Actions (login required)

View Item View Item

Browse Repository
Collection
   Articles
   Book
   Speeches
   Thesis
   UMS News
Search
Quick Search

   Latest Repository

Link to other Malaysia University Institutional Repository

Malaysia University Institutional Repository