Box-Behnken design to optimize the synthesis of new crosslinked chitosan-glyoxal/TiO nanocomposite: Methyl orange adsorption and mechanism studies.

07:00 EST 5th February 2019 | BioPortfolio

Summary of "Box-Behnken design to optimize the synthesis of new crosslinked chitosan-glyoxal/TiO nanocomposite: Methyl orange adsorption and mechanism studies."

A crosslinked chitosan-glyoxal/TiO nanocomposite (CCG/TNC) was synthesized by loading different ratios of TiO nanoparticles into polymeric matrix of crosslinked chitosan-glyoxal (CCG) to be a promising biosorbent for methyl orange (MO). Box-Behnken design (BBD) in response surface methodology (RSM) was applied to optimize various process parameters, viz., loading of TiO nanoparticles into CCG polymeric matrix (
0%-50%), adsorbent dose (
0.04-0.14 g/50 mL), solution pH (
4-10), and temperature (
30-50 °C). The highest MO removal efficiency of 75.9% was observed by simultaneous interactions between AB, AC, and BC. The optimum TiO loading, adsorbent dosage, solution pH, and temperature were (50% Ti
50% chitosan labeled as CCG/TNC-50), 0.09 g/50 mL, 4.0, and 40 °C. The adsorption of MO from aqueous solution by using CCG/TNC-50 in batch mode was evaluated. The kinetic results were well described by the pseudo-first order kinetic, and the equilibrium data were in agreement with Langmuir isotherm model with maximum adsorption capacity of 416.1 mg/g. The adsorption mechanism included electrostatic attractions, n-π stacking interactions, dipole-dipole hydrogen bonding interactions, and Yoshida H-bonding.


Journal Details

This article was published in the following journal.

Name: International journal of biological macromolecules
ISSN: 1879-0003


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