Equilibrium, thermodynamic and kinetic modeling of triclosan adsorption on mesoporous carbon nanosphere: Optimization using Box-Behnken design

Abstract

In this study, a high-potential nanoadsorbent from mesoporous carbon nanospheres (MCNS) was synthesized and characterized by TEM, XRD, SEM, Raman, and BET analysis. The novel MCNS nanoadsorbent was found to has high efficiency for adsorbing triclosan (TCS) form an aqueous solution. An investigation was done on how the pH of the solution affects the adsorption equilibrium. On the other hand, adsorption isotherm models were fitted to a Langmuir model, showing that chemisorption was the technique of adsorption. The total rate of TCS adsorption on MCNS was determined using kinetic models, which were fitted to a pseudo-second-order model. Using the response surface methodology (RSM), the four adsorption process parameters of time, temperature, solution pH, and adsorbent dosage were adjusted. According to the (ΔH°), (ΔS°), and (ΔG°), TCS was endothermically and spontaneously extracted utilizing MCNS as an adsorbent. The synthesized MCNS adsorbent exhibits remarkable render ability and reusability for up to five cycles of adsorption–desorption. As a proof of concept, the produced adsorbent's efficiency was assessed for filtering wastewater samples on a lab scale. Investigate the mechanism by which the MCNS and TCS interact, since this process may include electrostatic interaction, pore filling, π-π interaction, or H-bonding. Water filtration and industrial wastewater treatment were made easy and efficient with the MCNS adsorbent. Our research indicates that our work is the first to describe how to extract TCS using MCNS adsorbent from wastewater samples. The findings show that a pH value of 6 yields a maximum TCS adsorption capability onto MCNS of 607.95 mg g−1.