MB Dye Removal by Adsorption and Photo-Degradation using Modified (Mobil Composition of Matter No 41) MCM-41

Abstract

Dyes in surface water are ubiquitous mostly due to textile industries, tanning, dye-stuff manufacturing, and food processing industries. These are the crucial reasons of water contamination. For the recalcitrant or non-biodegradable nature they pose a great threat to the aquatic animals and act as carcinogens and very toxic to mammals. Different methods are used to remove dyes i.e. reverse osmosis, and ultra-filtration. In this paper we have compared two methods that are low cost, efficient and have repetitiveness. Iron and cobalt doped “(MOBIL COMPOSITION. OF MATTER NO 41) MCM-41”   and transitional metal doped TiO2 – (“MOBIL. COMPOSITION OF MATTER NO. 41) MCM-41”   were taken as the  adsorbents and photo catalysts respectively. The characterisation with PXRD, SEM, FTIR and UV-DRS showed that the alteration are not change the structure, huge surface zone and greater pore volume of pristine “(MOBIL COMPOSITION. OF MATTER NO 41) MCM-41” This acted as a very good adsorbent in removing MB at PH = 4 and at a temperature of 308 K. The uptake was more with increment in starting fixation and absorbent position. It pursued a chemical reaction of second order and connected well to Freund-lich model. The photo catalytic degradation with transition metal incorporated TiO2 “(MOBIL COMPOSITION. OF MATTER NO 41) MCM-41”   is best fit for Pseudo-first order kinetics under visible light. Between the studied methods the dye removal was optimum upto 99% in 2 h during adsorption and 100% in 1 h during photo degradation. Therefore it is concluded that photo catalytic degradation is a more efficient method in comparison to adsorption for aqueous dye removal from surface water.