Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 29, Issue 13, Pages 18680-18688Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-021-17169-z
Keywords
Adsorption mechanism; Covalent organic frameworks; Controlled synthesis; Kinetic experiment; Thermodynamic experiment; Sulfonamides
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Funding
- Beijing Municipal Education Commission [KM202010028006]
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In this study, four types of COF materials were synthesized by an ultrasonic method for adsorption of five sulfonamides. Optimization and kinetic experiments revealed main adsorption mechanisms such as pore filling, hydrogen bond interactions, and electrostatic attraction.
In 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.
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