Isotherm adsorption studies of Ni(II) ion removal from aqueous solutions by modified carboxymethyl cellulose hydrogel

2nd International Symposium on Green Technology for Value Chains 2017

工业技术;生态环境科学

Anah, L.^1 ; Astrini, N.^1

Research Unit for Clean Technology, Indonesian Institute of Sciences (LIPI), Komplek LIPI Bandung, Jalan Sangkuriang, Gedung 50, Bandung

40135, Indonesia^1

关键词: Carboxy-methyl cellulose;    Cross linking agents;    Fourier transform infrared;    Graft co polymerizations;    Langmuir and Freundlich isotherm models;    Modified carboxymethyl cellulose;    N ,N'-methylenebisacrylamide;    Poly(acrylic acid );   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/160/1/012017/pdf
DOI  :  10.1088/1755-1315/160/1/012017

来源: IOP

【 摘 要 】

This paper reports the removal of nickel ions from aqueous solutions using carboxymethyl cellulose-graft-poly(acrylic acid) CMC-g-PAA hydrogel as an adsorbent. The hydrogel was prepared through graft copolymerization of acrylic acid monomer onto a carboxymethyl cellulose backbone in the presence of N,N'-methylenebisacrylamide as a crosslinking-agent using benzoyl peroxide initiator system. Isotherm for the adsorption of nickel on CMC-g-PAA hydrogel was developed and the equilibrium data fitted to the Langmuir and Freundlich isotherm models. The result showed that at pH of 5 and shaker speed of 100 rpm, Freundlich model was better fitted than Langmuir model, of which R2= 0.999 and R2= 0.935, respectively. The constant of Langmuir model was KLvalue = 0.003 and qmax= 1000 mg/g, whereas the constant of Freundlich model n = 1.2 and KF= 4.614. The CMC-g-PAA hydrogel before and after Ni(II) adsorption were characterized using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR).