Enhanced adsorption removal of phosphate from water by Ag-doped PVA-NiO nanocomposite prepared by pulsed laser ablation method

Abstract

Phosphate exists concurrently in multiple waste streams. Embedded nickel oxide in polyvinyl alcohol (NiO/PVA) was doped by silver nanoparticles (Ag) to generate an Ag-doped NiO/PVA nanocomposite structure prepared by multiple laser ablation process technique for removing phosphate. Different techniques were used to characterize the physicochemical properties of the substance. The characterization results of the prepared nanocomposites showed that NiO and Ag were successfully integrated into the PVA structure. They confirmed the production of hybrid nanocomposites by a reduction in the peak height due to intramolecular and intermolecular interactions with Ag nanoparticles from Raman spectra. Also, the shift in the absorbance transition characteristic and the appearance of vibrational motions of NiO and Ag confirmed the successful interaction between PVA, Ag, and NiO. After that, in the adsorption study, the most important aspect of the investigation was a series of phosphate adsorption tests from aqueous solutions, which showed that the efficiency of the adsorption process is dependent on the concentrations of the adsorbate and adsorbent, the pH, the reaction time, and the temperature. The results indicate that the current Ag-doped NiO/PVA nanocomposite adsorbent has the capacity to control phosphorus contamination in water.