Optimization Of Adsorptive Removal Of Phosphate From Aqueous Medium Using Yeast Extract – Reduced Manganese Oxide Particles

IJEP 41(11): 1218-1226 : Vol. 41 Issue. 11 (November 2021)

Md. Habeeb Ahmed1, B.S. Srivathsava1, 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


Water pollution has been one of the major concerns over the years and with an uncontrollable increase in pollutants, it, directly and indirectly, affects human health. One such concern is increase in phosphate pollution, which is significantly increasing in domestic wastewater. Sources of phosphate pollution are multiple industrial and municipal sources, which require serious attention at both the source and treatment level. In the current study, we have developed a novel technique for synthesis of manganese oxide particles from potassium permanganate using yeast extract as a reducing agent and employed for phosphate adsorption. Physical, surficial and thermal characteristics of manganese oxide particles revealed the presence of higher adsorptive properties alike the other chemical synthesis techniques. Adsorption of phosphate upto 87% was achieved at optimized parameters (pH: 7, time: 3 hr, initial concentration: 50 ppm, absorbent dosage: 2 g/L, temperature 300C). Kinetics and isotherms study revealed the reaction to be following pseudo second-order kinetics and in good compliance with Freundlich isotherm. Thermodynamics studies revealed that reaction is spontaneous and endothermic in nature.


Yeast extract, Manganese oxide, Potassium permanganate, Freundlich isotherm, Endothermic, Thermodyna-mics


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