Study of Isotherm and Kinetic Parameters for Efficient Adsorption of Methylene Blue Dye onto the Surface of Meldrum’s Acid Modified SPIONs

Keerti Rani, Jaiveer Singh, Arti Jangra, Parvin Kumar, Suresh Kumar and Ramesh Kumar*,

Department of Chemistry, Kurukshetra University, Kurukshetra-136119, India

*Corresponding author: E-mail:;


In present study, Meldrum’s acid modified magnetite nanoparticles (MA-Fe3O4) were synthesized for the removal of methylene blue by co-precipitation method. These coated nanoparticles were examined by TGA, FESEM, XRD, FTIR and UV-vis analysis. The FESEM results depicted that mean size of modified superparamagnetic iron oxide nanoparticles (SPIONs) was about 30 nm. Meldrum’s acid modified magnetic nanoparticles were found extremely effective in methylene blue dye adsorption from aqueous solution. The data obtained from isotherm study showed that adsorption process was consistent with Freundlich Model. Moreover, kinetic studies revealed that the adsorption of the dye on surface of coated magnetic nanoparticles followed pseudo-second order kinetics. Additionally, a comparative study has been made for the methylene blue dye removal efficiency by Meldrum’s acid modified magnetic nanoparticles with already reported adsorbents.


Adsorption, Methylene blue, Isotherm, Kinetics, Meldrum’s acid, SPIONs.

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