No abstract

A B S T R A C TWastewater 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/H 2 O 2 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.

The HIV virus, probably more accurately referred to as primate lymphotropic virus, has been found in troglodyte chimpanzees in equatorial West Africa. Due to racial and cultural discrimination, researchers have mistakenly focused their attention on the geographic longitude of the African continent rather than on the geographic and biological latitude of the equator in the Amazon Basin, perhaps the origin of all life in its most diverse forms.