Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/34457
Title: Surface Modification of Magnetic Nanoparticles with Carboxymethyl-Beta-Cyclodextrin for Removal of Dyes in Wastewater
Authors: DEVITA CHRISTIANI CAHYADI
Keywords: magnetic nanoparticles, carboxymethyl beta-cyclodextrin, surface modification, adsorption, desorption, anionic and cationic dyes
Issue Date: 12-Mar-2012
Source: DEVITA CHRISTIANI CAHYADI (2012-03-12). Surface Modification of Magnetic Nanoparticles with Carboxymethyl-Beta-Cyclodextrin for Removal of Dyes in Wastewater. ScholarBank@NUS Repository.
Abstract: Nano-sized magnetic particles have shown their potential application in wastewater treatment. The magnetic nanoparticles exhibit superparamagnetic property, large specific surface area per unit volume, low toxicity and biocompatibility. A nanoadsorbent, Fe3O4 nanoparticles coated with carboxymethyl-ß-cyclodextrin (CMCD-MNPs) is prepared using Fe2+ and Fe3+ salts, alkaline environmental and inert atmosphere, followed by modifying their surface with CM-ß-CD through one step chemical precipitation method. Adsorption experiments of Rhodamine B (RhB) and Acid Blue 25 (AB25) are carried out in two adsorption parameters, pH and temperature. Adsorption equilibrium and kinetic data are well represented by Langmuir and pseudo-second-order kinetic models, respectively. The attachment of the dyes onto the surface of magnetic nanoparticles adsorbent is analyzed. Moreover, desorption studies of target molecules from nanoadsorbent are performed using different desorbents such as organic solvents, acidic and alkaline solutions. The regeneration of nano-sized magnetic particles is also investigated. Experimental results show that the surface modification of nano-sized magnetic particles with CM-ß-CD enhances the adsorption capacity for the removal of anionic and cationic dyes in wastewater.
URI: http://scholarbank.nus.edu.sg/handle/10635/34457
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