Document Type

Article

Publication Date

2-2024

Abstract

Water scarcity is the most imperative predicament that concerns the population. In this research, a roller kiln (RK) industrial solid waste was used in the adsorption of phosphate ions from aqueous solutions thus converting a waste to wealth through aiding in serving as a water treatment application. The RK waste was produced from an Egyptian factory with a fow rate of million tons/ day. Surface characterization for this solid waste was performed including transmission electron microscopy (TEM), X-ray difraction (XRD), X-ray fuorescence (XRF), Fourier transform infra-red (FTIR), zeta potential (ZP), and particle size distribution (PSD). Based on the kinetics and isotherm studies, the pseudo frst order (PFO) kinetic model and Freundlich isotherm model were the best-ftted models with the experimental data as well as the Dubinin–Radushkevich isotherm model indicated that the adsorption type was physical. The attained experimental results were then optimized to attain the experimental conditions at which the optimum adsorption percentage was achieved using response surface methodology (RSM). The optimum percentage removal of phosphate ions 99.5 (%) was achieved at the following experimental conditions; pH 8, temperature= 25 °C, contact time = 9 min, initial phosphate ion concentration= 10 mg/L and adsorbent dose 0.5 =g/L.

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