Synthesis, characterization, kinetics and modeling studies of new generation pollutant ketoprofen removal in water using copper nanoparticles

Abstract

Copper nanoparticles were synthesized following their characterization by XRD, SEM-EDX and TEM techniques. These nanoparticles were used to remove new generation pollutant ketoprofen up to 89% at optimal conditions of 50 mg/L concentration, 50 min, 5.0 pH, 1.0 g/L dose and 25 °C. The adsorption followed the Langmuir, Temkin and Dubinin - Radushkevich models describing good adsorption of ketoprofen in water. The adsorption followed pseudo-first-order and liquid film diffusion mechanism. The adsorption was spontaneous and exothermic as proposed by the thermodynamics data. The supramolecular mechanism was purposed for the adsorption. Remarkably, the adsorption process was appropriate at low contact time. These properties of the adsorption made this development applicable to natural water resources, making the process economic and eco-friendly. So, this adsorption method may be used to remove ketoprofen in water easily at an inexpensive level.