Isotherm adsorption studies of Ni(II) ion removal from aqueous solutions by modified carboxymethyl cellulose hydrogel
| Autor: | Lik Anah, Nuri Astrini |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
021110 strategic
defence & security studies Langmuir Aqueous solution Chemistry 0211 other engineering and technologies Langmuir adsorption model 02 engineering and technology 010501 environmental sciences 01 natural sciences Carboxymethyl cellulose chemistry.chemical_compound symbols.namesake Adsorption symbols medicine Freundlich equation Fourier transform infrared spectroscopy 0105 earth and related environmental sciences Acrylic acid Nuclear chemistry medicine.drug |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 160:012017 |
| ISSN: | 1755-1315 1755-1307 |
| DOI: | 10.1088/1755-1315/160/1/012017 |
| Popis: | 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 KL value = 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). |
| Databáze: | OpenAIRE |
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