Adsorption of Cu²⁺ from Aqueous Solution by Crosslinked Carboxymethyl Tamarind

Abstract:

Crosslinked carboxymethyl tamarind (CCMTKP) with degree of substitution (DS) 0.42, 0.64 and 0.88 were prepared through reaction of sodium monochloroacetic acid (SMCA), epichlorohydrin (ECH) and tamarind kernel polysaccharide (TKP) and used to adsorb Cu²⁺ from aqueous solution. The appropriate range for pH was 2-6. The adsorption capacity rapidly reached equilibrium within 15 min and adsorption followed second-order kinetic equation. The adsorption of Cu²⁺ is well followed as the Langmuir isotherm and the maximum adsorption capacity (Q_m) was 68.03 mg/g. The regeneration study indicates that CCMTKP could be used repeatedly without significantly changing their adsorption capacities.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 2100-2105
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.2100
• Online since: September 2013
• Authors: Chun Mei Niu, Shao Ying Li, Fang Lan
• Keywords: Adsorption, Crosslinked Carboxymethyl Tamarind, Cu²⁺

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