Effective triclosan removal by using porous aromatic frameworks in continuous fixed-bed column studies

Abstract

Abstract Triclosan (TCS) has been regarded as an emerging contaminant in aquatic systems, so its efficient removal holds great significance. In this study, NPVMo@iPAF-1, with specific surface area of 665 m2/g, prepared by incorporating (NH4)5H6PV8Mo4O40 into porous aromatic frameworks (PAF) was obtained. And fixed-bed columns packed with NPVMo@iPAF-1 were employed for TCS removal. The experiment data strongly correlated with the Thomas and Yoon-Nelson models under different operation conditions. The pore preservation, electrostatic effect and the synergistic effect of π-π interaction contributed to the effective adsorption of TCS onto NPVMo@iPAF-1. The NPVMo@iPAF-1 fixed-bed column could be effectively regenerated by in-situ ozonation for more than 10 regeneration cycles. NPVMo@iPAF-1 turned out to be a promising adsorbent for removing TCS not only from pure water but also from reclaimed water and surface water samples.