Abstract
Montmorillonite (MMT) clay incorporated chitosan (CT) nanocomposite was prepared by simplified ionic gelation method. Different characterization techniques were performed to investigate the binding and structural properties of prepared materials. It was found that incorporation of clay into chitosan followed by crosslinking with glutaraldehyde (GLU) enhances the arsenate sorption rate and better stability was observed on cyclic run compared to glutaraldehyde crosslinked chitosan (Ct/Glu). The sorption process attained equilibrium within 90min of treatment time and a dose of 2g/L of crosslinked chitosan/MMT (MMT/Ct/Glu) was sufficient to bring down the arsenate concentration below 0.01mg/L. Increase in initial ion concentration of arsenate ions decreases the sorption rate, but the ion uptake capacity increases. The sorption was reasonably explained with Langmuir (RL∼0.995 & 0.996 for MMT/Ct/Glu & Ct/Glu) and Freundlich isotherms (n∼2.75 & 3.12 for MMT/Ct/Glu & Ct/Glu). The R2 values indicated a monolayer type of chemisorption pattern. The sorption process was found to be governed by pseudo second order kinetics.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
