Adsorption behavior and mechanism of sulfonamides on controllably synthesized covalent organic frameworks

Environ Sci Pollut Res Int. 2021 Oct 25. doi: 10.1007/s11356-021-17169-z. Online ahead of print.ABSTRACTIn this work, four kinds of covalent organic framework (COF) materials (TpPa-1, TpBD, TpDT, and TFBBD) with different pore sizes or functional groups were synthesized by an ultrasonic method for the adsorption of five sulfonamides. Optimization experiments regarding the adsorption time, vortex speed, and pH were carried out to improve adsorption efficiency. In addition, kinetic and thermodynamic experiments were conducted to explore the adsorption mechanism of the sulfonamides on the different COFs. The adsorption processes of the five sulfonamides on the four COFs fit the pseudo-second-order kinetic model and Langmuir adsorption isotherm model. Additionally, pore filling, hydrogen bond interactions, and electrostatic attraction were found to be the main adsorption mechanisms.PMID:34697714 | DOI:10.1007/s11356-021-17169-z
Source: Environmental Science and Pollution Research International - Category: Environmental Health Authors: Source Type: research