Removal of Copper(II) Ion using Nanochitosan/Carboxymethyl Cellulose/Grapheme Oxide Composite Biosorbent

S. Sugashini1,, T. Gomathi1,*,, S. Pavithra1,, P.N. Sudha1,*,, J. Annie Kamala Florence2, and A. Mubashirunnisa3,

1Biomaterials Research Lab, PG and Research Department of Chemistry, D.K.M. College for Women, Vellore-632001, India

2Department of Chemistry, Voorhees College, Vellore-632001, India

3Department of Chemistry, Sri Krishna College of Engineering, Arakkonam-631003, India

*Corresponding authors: E-mail: drparsu8@gmail.com; drgoms1@gmail.com

Abstract

The present study aimed to prepare a novel biosorbent of nanochitosan (NCS)/carboxymethyl cellulose (CMC)/graphene oxide (GO) and used to remove Cu(II) ion from wastewater system. The prepared nanocomposite was characterized using FTIR, XRD and SEM analysis. The FTIR and XRD results revealed the formation of novel NCS/CMC/GO nanocomposite. Rough surface morphology of nanocomposite was confirmed from the SEM analysis results. The removal efficiency of Cu(II) ion was evaluated through batch mode by varying pH, adsorbent dose, contact time and initial metal ion concentration. The maximum removal of Cu(II) ion was 80.1% at pH 4, 92.4% at 360 min contact time and about 89.2% for 3 g adsorbent dose. Theoretical models such as Langmuir isotherm, Freundlich isotherm, and kinetics models were used to evaluate the experimental results. After examining, the results revealed that the adsorption follows Freundlich isotherm and pseudo-second-order models. The adsorption capacity of the prepared nanocomposite was 145.22 mg/g.

Keywords

Ternary composite, Carboxymethyl cellulose, Graphene oxide, Nanochitosan, Batch adsorption.

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