Removal of Bisphenol A and 2, 4-Dichlorophenol from Lake Water Using a Flower-Like Covalent Organic Framework

Covalent organic frameworks have received interest in many fields due to their fascinating properties. In this work, a flower-like covalent organic framework was prepared by a simple solvothermal method and used as an adsorbent for the removal of bisphenol A and 2,4-dichlorophenol from lake water. Due to the inherent hydrophobicity and large delocalized π-electron system, the proposed flower-like covalent organic framework forms π-π staking interactions with the aromatic ring-related compounds. Furthermore, the advantages of flower-like covalent organic framework, such as the porous structure and large specific surface area, facilitate the adsorption of phenolic compounds. Therefore, the flower-like covalent organic framework exhibited a relatively high affinity for bisphenol A and 2,4-dichlorophenol with adsorption capacity values of 56.8 mg/g and 36.6 mg/g, respectively. Furthermore, this material was successfully applied to remove bisphenol A and 2,4-dichlorophenol from lake water samples.