Abstract
The removal of Ciprofloxacin (CFX) on SiO2 nanoparticle was performed as a function of initial CFX concentration, contact time at fixed pH and adsorbent dose and characterized using scanning electron microscopy (SEM) and Brunauer Emmett Teller (BET) surface area. Amount of CFX uptake increased with increasing contact time and decreased concentration of initial CFX. Adsorption behavior was well described by pseudo second-order kinetic model. It was observed that equilibrium dye uptake significantly increased from 49.01 to 174.58 mg/g when initial CFX concentration increased from 25 to 100 mg/L. Experimental data were well fitted to Langmuir, Freundlich and Temkin and Dubinin-Radushkevich (D–R) models. Three different error functions were conducted to find better model to describe the experimental data. The lower values of error functions exhibited that Langmuir model was more suitable for the adsorption of CFX, which implied a homogeneous sorption phenomenon.
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