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Materials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India E-mail : anandprabu@vit.ac.in Department of Architectural Engineering, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea E-mail : kimhc@khu.ac.kr In the present study, polyethylene glycol coated iron-oxide beads were successfully used to adsorb CrVI from synthetic solutions. Studies on adsorption were carried out by varying parameters such as adsorbent dosage, pH, and contact time. 0.05 g of Fe3O4 /PEG adsorbent showed highest adsorption capacity of 38 mg/g of adsorbent at pH 6 under 90 min of shaking time for 1000 ppm solution. Among the correlation coefficient values obtained using three different models (intra-particle diffusion model, pseudo-first order and kinetics), the pseudo-second order model proves to be the best fit with R2 values of 0.9998. |
