Aqueous nitrate removal by D417 resin: thermodynamic, kinetic and response surface methodology studies

摘要: In this study, D417 resin was characterized using scanning electron microscopy, Fourier transform infrared spectrometry and thermogravimetric analysis (TGA). Batchwise experiments were carried out to evaluate the thermodynamic kinetic behaviors of aqueous nitrate adsorption onto resin. Response surface methodology (RSM) with Box–Behnken design (BBD) employed analyze competition disturbance matrix effects in terms pH, organic matter concentration, contact time (CT) salinity. Test results revealed that composed quaternary ammonium functional group exhibited a considerable capacity 23.46 22.81 mg·g−1 at temperature ranging from 293.15 313.15 K. Mean free energy calculated Dubinin–Radushkevich model showed realized through ion-exchange pathway. Gibbs change, enthalpy change entropy illustrated sorption feasible spontaneous. It also found pseudo-second-order could well describe kinetics, intraparticle diffusion main rate-limiting step. RSM BBD CT salinity had significant on adsorption, whereas impacts pH dissolved negligible. © 2011 Curtin University Technology John Wiley & Sons, Ltd.