Adsorptive removal of bisphenol A from aqueous solution using metal-organic frameworks

Adsorptive removal of bisphenol A (BPA) from aqueous solution has been studied over two highly porous metal-organic frameworks (MIL-101(Cr) and MIL-100(Fe)) in view of the adsorption kinetics, adsorption isotherm, effect of initial pH and effect of ionic strength. The adsorption kinetics fit pseudo-second-order kinetic model well and the adsorption isotherms follow the Langmuir model. The adsorption kinetics and capacity of BPA over MIL-101(Cr) generally depend on the average pore size and specific surface area (or pore volume), respectively. The adsorption mechanism may be explained with pi-pi interaction and hydrogen bonding between BPA and MIL-101(Cr). Finally, it can be suggested that metal-organic frameworks possessing high porosity and large pore size can be used as potential adsorbents to remove harmful endocrine disrupting chemicals in contaminated water.