Covalent organic frameworks as efficient adsorbent for sulfamerazine removal from aqueous solution
Shuting Zhuang1, Yong Liu2, Jianlong Wang3
1Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, China.
A novel adsorbent, triphenylbenzene-dimethoxyterephthaldehyde-covalent organic framework (TPB-DMTP-COF), effectively removes sulfamerazine from water. This material exhibits high capacity, fast equilibrium, and reusability, highlighting its potential for environmental remediation.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Sulfamerazine (SMT) is a common pharmaceutical pollutant in aqueous solutions.
- Effective removal of SMT is crucial for environmental remediation and water safety.
- Covalent organic frameworks (COFs) offer promising properties for pollutant adsorption.
Purpose of the Study:
- To synthesize and characterize a TPB-DMTP-COF adsorbent.
- To investigate the adsorption performance and mechanism for SMT removal.
- To evaluate the potential of COFs for environmental remediation applications.
Main Methods:
- Preparation and characterization of TPB-DMTP-COF.
- Adsorption experiments in aqueous solutions under varying pH conditions.
- Analysis of adsorption kinetics, capacity, and reusability.
- Density Functional Theory (DFT) calculations to elucidate the adsorption mechanism.
Main Results:
- TPB-DMTP-COF demonstrated a high adsorption capacity of 209 mg/g for SMT.
- Adsorption equilibrium was reached rapidly within 80 minutes.
- Optimal adsorption occurred at natural pH, with electrostatic repulsion hindering adsorption at extreme pH values.
- DFT analysis confirmed C-H···π interaction as the primary adsorption mechanism.
Conclusions:
- TPB-DMTP-COF is a highly effective adsorbent for SMT removal from water.
- The material's structural properties (large channels, high surface area) contribute to its excellent performance.
- COF skeletons possess significant potential for developing advanced materials for environmental remediation.
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