Comparative degradation studies of Malachite Green and Thiazole Yellow G and their binary mixture using UV/H2O2. Issue 18 (14th April 2016)

• Record Type: Journal Article
• Authors: Rauf, Muhammad Abdul; Ali, Liaquat; Sadig, Mohammed Saad Aldin Yamani; Ashraf, Syed Salman; Hisaindee, Soleiman
• Is Part Of: Desalination and water treatment. Volume 57:Issue 18(2016)
• Page Start: 8336
• Page End: 8342
• Publication Date: 2016-04-14
• Subjects: Dyes -- Degradation -- Advanced oxidation process -- TOC -- Wastewater; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2015.1017745
• Languages: English
• ISSNs: 1944-3994

Abstract

Abstract: Wastewater effluents of many industries are usually composed of dye mixtures and their removal poses a significant challenge. The present study reports on the use of an advanced oxidation process namely UV/ H2 O2 to degrade Malachite Green (MG) ( k = 0.0518 min −1 ) and Thiazole Yellow G (TYG) ( k = 0.0367 min −1 ), and their binary mixture in aqueous solutions. Interestingly, it was seen that the photolytic degradation of dyes in binary solution was slower (by 10% for MG and by 46% for TYG) than that in neat solutions under comparable conditions. The total organic carbon analysis (TOC) was also carried out in both the neat dyes (38.5% decrease for MG and 13% decrease for TYG), and in mixture the TOC change was 40%. HPLC analyses confirmed the formation of intermediates in both individual dye solutions, which were however not seen in binary mixtures. The present work shows that dye mixtures behave very differently than neat dyes, and highlights the importance of studying complex dye mixtures and the possible deleterious interactions between dye intermediates during the remediation process.