Comparison of different polymeric resins for naproxen removal from wastewater

作者：Kurtulbas Ebru; Bilgin Mehmet; Sahin Selin; Bayazit Sahika Sena^*

来源：Journal of Molecular Liquids, 2017, 241: 633-637.

DOI：10.1016/j.molliq.2017.06.070

• Amberlite XAD-2
• Amberlite XAD-4
• Amberlite XAD-16
• Naproxen
• Adsorption

The polymeric resins are eco-friendly, cheap and have good surface properties. These resins were used for Naproxen (NPX) adsorption from aqueous solutions. Three different resins were chosen. These are Amberlite XAD-2, XAD-4 and XAD-16. The effects of adsorption variables were tested. The variables were selected as adsorbent quantity, NPX concentration, pH of solution, temperature and contact time. Langmuir and Freundlich isotherm models were applied to the experimental data. And it was observed that Langmuir isotherm model fitted the experimental data properly. The pseudo second order kinetic model and Weber-Morris intraparticle diffusion model were used for kinetic analysis of NPX adsorption. The pseudo second order model was the best fitted kinetic model for NPX adsorption. The rate-controlling step was determined as the intraparticle diffusion step. The NPX adsorption on Amberlite resins was exothermic process. According to isotherm parameters, separation factor (R-L) values, kinetic and thermodynamic data, XAD-4 was found to be the most suitable adsorbent for NPX adsorption. Amberlite XAD-4 reached the maximum removal percentage (99.88%) at 0.5 g of adsorbent. NPX adsorption capacity of XAD-4 was 6.52 mg/g at 308 K, according to Langmuir isotherm model.

• 出版日期2017-9