Microporous metal-organic frameworks against endocrine-disruptor bisphenol A: parametric evaluation and optimization

Abstract

Metal-organic frameworks (MOFs) have received great attention in a recent material sciences revolution. The present study was conducted to investigate the performance of two different synthesized MOFs for adsorption of a common synthetic endocrine-disrupter Bisphenol A (BPA) from the aquatic system. Highly crystalline MIL-53 and MOF (Ni) were synthesized with an specific surface area (SSA) of 11.39 m 2 /g and 21.71 m 2 /g, respectively. The adsorption efficacy of MIL-53 was about 8 times more than MOF (Ni). The effects of various operating parameters (i.e., pH, MOF dose, BPA concentration, and agitation time) for removal of bisphenol A (BPA) were investigated. BPA removal affected by study variables in the order of MOF dose > pH > BPA concentration > agitation time. In comparison with two-parameters models, three-parametric isotherm models showed a better description for BPA equilibrium data. Exploration of adsorption mechanism was supported by monolayer BPA adsorption theory. Adsorption was also favored at high BPA concentration and at room temperature. The maximum capacity (Q max = 88.6 mg/g) of MIL-53 for adsorption of BPA was in a good match with the previous studies in which varieties of MOFs-based sorbents were applied. The current study showed promising results for the adsorption of BPA using MIL-53.