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

Abstract

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.

Keywords:

• Adsorption
• bisphenol A
• 2,4-dichlorophenol
• flower-like covalent organic framework
• spectrophotometry

Additional information

Funding

This work was financially supported by the Basic Research Foundation of Yunnan Province (grant numbers 2016CP021 and 2017FD236), the Basic Research Foundation of China Tobacco Yunnan Industrial Company (grant numbers 2019XY01 and 2018JC04), the Project Foundation of Yunnan Key Laboratory of Tobacco Chemistry (KCFZ-2017-1096), and the Technology Talent and Platform Program of Yunnan Province (2019HB079).