Insight into the adsorption kinetics, mechanism, and thermodynamics of methylene blue from aqueous solution onto pectin-alginate-titania composite microparticles
Open Access
- 27 January 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in SN Applied Sciences
- Vol. 3 (2), 1-16
- https://doi.org/10.1007/s42452-021-04245-9
Abstract
In the present study, pectin-alginate-titania (PAT) composites were synthesized and the adsorptive removal behavior of methylene blue (MB) from aqueous solution, as a model of synthetic organic effluents, onto the prepared PAT composites were investigated by monitoring the effect of contact time, initial MB concentration, and temperature. The adsorption isotherm data were fitted well with the Freundlich isotherm model, suggesting the surface heterogeneity of the PAT composites and that the MB adsorption occurred on the active sites on multilayer surface of the composites. The adsorption kinetics of MB was demonstrated to be pseudo-second order, governed by two intraparticle diffusion rates, and the adsorption process was exothermic, spontaneous, and more disorder. The Langmuir isotherm model suggested that the maximum adsorption capacity of MB on the PAT composites was in the range of 435–637 mg g–1. In general, it increased with the TiO2 NPs content in the PAT composites, due most likely to the increase in surface area exposing more functional groups of the pectin and alginate to interact with the synthetic dye. The adsorptive removal of MB by the PAT composites was found to be more efficient compared with many other reported adsorbents, such as graphene oxide hybrids, pectin microspheres, magnetite-silica-pectin composites, clay-based materials, chemically treated minerals, and agricultural waste. The present study therefore demonstrated for the first time that PAT composites are not only promising to be utilized as an adsorbent in wastewater treatment, but also provide an insight into the adsorption mechanism of the synthetic dyes onto the biopolymers-titania composites. Graphic Insight into the adsorption kinetics, mechanism, and thermodynamics of methylene blue from aqueous solution onto pectin-alginate-titania composite microparticles.Keywords
This publication has 73 references indexed in Scilit:
- Process optimization studies of Congo red dye adsorption onto cashew nut shell using response surface methodologyInternational Journal of Industrial Chemistry, 2013
- Advanced Oxidation Processes for Wastewater Treatment: Formation of Hydroxyl Radical and ApplicationCritical Reviews in Environmental Science and Technology, 2012
- Textile dyeing industry an environmental hazardNatural Science, 2012
- Adsorption of methylene blue dye from aqueous solution by agricultural waste: Equilibrium, thermodynamics, kinetics, mechanism and process designColloid Journal, 2011
- Common data analysis errors in batch adsorption studiesHydrometallurgy, 2011
- Extraction and characterization of pectin from apple pomace and its evaluation as lipase (steapsin) inhibitorCarbohydrate Polymers, 2010
- X-ray Diffraction Imaging of Anatase and RutileAnalytical Chemistry, 2010
- Biosorption isotherms, kinetics and thermodynamicsSeparation and Purification Technology, 2008
- Fourier transform Raman and infrared spectroscopy of pectinsCarbohydrate Polymers, 2003
- KINETICS OF POLLUTANT SORPTION BY BIOSORBENTS: REVIEWSeparation and Purification Methods, 2000