Adsorption PO43- ion in aqueous solution using ZnO nanomaterials fabricated by electrochemical method

Abstract

The study presents the results of the adsorption ability of phosphate ion (PO₄^3-) in aqueous solution using ZnO nanomaterials fabricated by electrochemical method. The effects of initial pH (1-8), contact time (0-180 minutes), initial adsorbent dosages (0.2-1.2 g/L), and initial concentrations of PO₄^3- ion (10-100 mg/L) have been studied at ambient temperatures (25°C±2°C). The results found the optimal conditions for adsorption of PO₄^3- at pH=5, 90 minutes of equilibrium time, and 0.6 g/L of adsorbent dosages. The model of Langmuir has been found perfectly adequate to describe the equilibrium results of adsorption and the maximum capacity has been determined to be 101,01 mg/g. The results are promising for the use of ZnO nanomaterials to remove PO₄^3- ion from the aqueous solution as well as the application of wastewater treatment in real conditions.