Adsorption of methyl violet from aqueous solution using gum xanthan/Fe3O4 based nanocomposite hydrogel

H Mittal; Vaneet Kumar; Saruchi; Suprakas Sinha Ray

doi:10.1016/j.ijbiomac.2016.04.050

Adsorption of methyl violet from aqueous solution using gum xanthan/Fe3O4 based nanocomposite hydrogel

Int J Biol Macromol. 2016 Aug:89:1-11. doi: 10.1016/j.ijbiomac.2016.04.050. Epub 2016 Apr 19.

Authors

H Mittal¹, Vaneet Kumar², Saruchi³, Suprakas Sinha Ray⁴

Affiliations

¹ Department of Applied Chemistry, University of Johannesburg, Doornfontein 2028, Johannesburg, South Africa; DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa. Electronic address: mittal.hemant5@gmail.com.
² Department of Applied Sciences, CT Group of Institutions, Jalandhar, Punjab, India.
³ Department of Chemistry, NIT Jalandhar, Punjab, India.
⁴ Department of Applied Chemistry, University of Johannesburg, Doornfontein 2028, Johannesburg, South Africa; DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa. Electronic address: rsuprakas@csir.co.za.

PMID: 27106587
DOI: 10.1016/j.ijbiomac.2016.04.050

Abstract

This research paper reports the utilization of gum xanthan-grafted-polyacrylic acid and Fe3O4 magnetic nanoparticles based nanocomposite hydrogel (NCH) for the highly effective adsorption of methyl violet (MV) from aqueous solution. Synthesized NCH was characterized using various techniques, such as FTIR, XRD, SEM-EDS, TEM and BET. Adsorption behavior of NCH was studied for the adsorption of MV and it was found to remove 99% dye from the solution. Adsorption process followed Langmuir isotherm model (qe=642mg/g) and pseudo-second-order kinetics model. Thermodynamic studies suggested that the adsorption process was endothermic and spontaneous. Moreover, the adsorbent was successfully utilized for successive five cycles of adsorption-desorption.

Keywords: Adsorption; Gum xanthan; Isotherms; Kinetics; Methyl violet; Nanocomposite hydrogel.

MeSH terms

Adsorption
Diffusion
Ferric Compounds / chemistry*
Gentian Violet / isolation & purification*
Hydrogel, Polyethylene Glycol Dimethacrylate / chemical synthesis
Hydrogel, Polyethylene Glycol Dimethacrylate / chemistry*
Hydrogen-Ion Concentration
Kinetics
Models, Theoretical
Nanocomposites / chemistry
Nanocomposites / ultrastructure
Polysaccharides, Bacterial / chemistry*
Solutions
Spectroscopy, Fourier Transform Infrared
Temperature
X-Ray Diffraction

Substances

Ferric Compounds
Polysaccharides, Bacterial
Solutions
ferric oxide
Hydrogel, Polyethylene Glycol Dimethacrylate
Gentian Violet
xanthan gum