Phosphate Removal from Aqueous Solution by Batch Adsorption onto Manganese Oxide Nanoparticles

IJEP 42(1): 45-51 : Vol. 42 Issue. 1 (January 2022)

Mohammed Habeeb Ahmed1, Vitthal Metangale1, Geethalakshmi Ramakrishnan2, Renganathan Sahadevan2 and Sangeetha Subramanian1*

1. Vellore Institute of Technology, School of Biosciences and Technology, Vellore – 632 014 , Tamil Nadu, India
2. Anna University, Centre for Biotechnology, Chennai – 600 025, Tamil Nadu, India


Increased industrial and human activities lead to release of pollutants in a hasty manner. Phosphate is one of the extensively released pollutants causing severe damage to water ecosystem. Current study is focused on the removal of phosphate by manganese oxide nanoparticles. Process influential parameters, like pH, concentration of phosphate, contact time, adsorbent dosage, ionic strength and temperature were optimized to enhance the process. Optimal phosphate removal upto 76% was achieved at pH 4 with phosphate concentration of 50 ppm within 30 min of contact time (adsorbent dosage- 1 g/L). Adsorption kinetics and isotherms studies were established. Pseudo-second order kinetic model and Freundlich adsorption isotherm model (R2>0.99) were found to fit very well with adsorption experimental data. Thermodynamics studies revealed that overall reaction was spontaneous and exothermic in nature.


Phosphate, Manganese oxide nanoparticles, Freundlich isotherm model, Pseudo-second order kinetic model, Thermodynamics study


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