Evaluation of the Efficiency of a Bio-Derived MgO Nano Powder Adsorbent in the Reduction Of COD, ORP, TDS, pH and EC of Tannery Wastewater

Adams A. D., Feka D. P., Shittu J. K., Mairiga A. A., Aliyu A., Onuruka C. C., Kudaisi F. O., Arinze O., Obasi Q. O., Samuel B. I., Oladimeji R. A.

Abstract


The tannery is responsible for the introduction of tannery wastewater into the environment and this wastewater contains high concentration of Chemical oxygen demand (COD) and other physiochemical parameters. the study of the performance of COD and physiochemical parameter degradation via adsorption was taken using Bio-derived MgO nano powder (MgO-p), synthesis using extract of locust beans and Mg (NO3)2 at 500oC following a green approach. The reduction efficiency of the MgO-p was evaluated in the presence of raw tannery wastewater by application of treatment time, adsorbent dosage, pH and concentration as parametric factors, and physicochemical properties such as Total dissolved solid (TDS), Electrical conductivity (EC), Oxidation-reduction potential (ORP) and pH. Result obtained were compared to environmental regulatory limits (WHO and NESERA). Concentration reported removal efficiency of 42.8% to 78.5% for COD, adsorbent dosage reported removal efficiency of 5.71 to 100, COD; contact times reported removal efficiency of 57.1 to 71.42% and pH reported removal efficiency of 5.7 to 50%. This study reveals that MgO powder is better applied as COD removal agent over other physicochemical parameters for tannery effluent treatment.


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