Preparation of COF TpPa-SO3Ag and its bromine adsorption in simulated saline water

Bromide ions may transform into harmful by-products such as bromate during the disinfection process, posing a threat to water quality and human health. Therefore, it is essential to remove bromide ions from water to reduce the risk of their conversion into more toxic compounds. Our study investigates the application of a novel covalent organic framework (COF) material for the removal of bromide ions from water. Through the optimization of the synthesis process, we have developed a COF material TpPa-SO 3 Ag, with a high specific surface area and favorable selectivity, in which silver ions and silver nanoparticles coexist. Experimental results indicate that this material achieves a maximum adsorption capacity of 100.05 mg g⁻ 1 and demonstrates exceptional removal efficiency across varying concentrations and environmental conditions. The adsorption process follows a pseudo-second-order kinetic model and Langmuir isotherm, highlighting the ability of the material to reach adsorption equilibrium rapidly, within approximately 40 min, upon contact with bromide ion solutions. This research not only showcases the potential of TpPa-SO 3 Ag as an efficient adsorbent for bromide ions but also offers new insights into the application of COF in environmental remediation. These findings pave the way for the development of effective water treatment materials and promote the broader application of COF materials in environmental science.