Equilibrium, Kinetic and Thermodynamic Studies Of Lead (II) Sorption on Hydrolyzed Starch Graft Copolymers

Journal Article · Thu Feb 15 04:00:00 EST 2018 · Journal of Polymers and the Environment

DOI:https://doi.org/10.1007/S10924-017-0949-X· OSTI ID:22788267

Ogbeifun, David E.; Okieimen, Felix E. ^[1]

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1. University of Benin, Department of Chemistry, Biomaterials Research Centre (Nigeria)

Hydrolyzed starch graft poly (acrylic acid) and starch graft poly(acrylonitrile) copolymers were used as a sorbents for the removal of Pb(II) from aqueous solution in batch process. The sorbents were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis. The effect of contact time, initial concentration and temperature were assessed to optimize the conditions for maximum sorption of the metal ions. The experimental data were analyzed by Langmuir, Freundlich, Temkin, Dubinin Radushkevich and Sips isotherm models. The Freundlich and the Sips isotherms confirmed the applicability of the models. The sorption capacity of the sorbent was found to be 118.61 mg/g for starch graft poly (acrylic) acid and 115.83 mg/g for starch graft poly (acrylonitrile). The Sorption kinetics was assessed by Lagergren pseudo first order, pseudo second order, Elovich equation, Intraparticle diffusion and the liquid film diffusion models. The experimental data fitted very well with the Elovich equation and the Intraparticle kinetic models. The thermodynamic analysis showed that the sorption was a spontaneous and endothermic process. The results indicated that starch graft copolymers can be used as an effective sorbents for Pb (II) removal from aqueous media.

• OSTI ID: 22788267
• Journal Information: Journal of Polymers and the Environment, Journal Name: Journal of Polymers and the Environment Journal Issue: 2 Vol. 26; ISSN 1566-2543
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACRYLIC ACID
ACRYLONITRILE
AQUEOUS SOLUTIONS
CASSAVA
CONCENTRATION RATIO
COPOLYMERS
DIFFUSION
EQUATIONS
EXPERIMENTAL DATA
FOURIER TRANSFORM SPECTROMETERS
GRAFTS
ISOTHERMS
KINETICS
LEAD
REMOVAL
SCANNING ELECTRON MICROSCOPY
STARCH
THERMAL GRAVIMETRIC ANALYSIS
THERMODYNAMICS