Efficient and selective capture of lead ions by a covalent organic framework: Structure, performance and mechanism

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-03-30 DOI:10.1016/j.jtice.2025.106108

Yongbing Yuan, Tinglu Wang, Liang He, Xingtong Ai, Lijun Li, Congshan Zhou, Tao Yang

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引用次数: 0

Abstract

Background

In recent years, lead contamination in aquatic environments has become a significant concern. Covalent organic frameworks (COFs) have shown great potential in preventing and remediating water pollution due to their superior performance characteristics.

Methods

DHTA-TAPA COF was synthesized via a solvothermal method through the condensation reaction between tris(4-aminophenyl) amine (TAPA) and 2,5-dihydroxyterephthalaldehyde (DHTA). The effects of parameters such as pH, initial ion concentration, temperature, and adsorption duration on the efficiency of Pb²⁺ removal by DHTA-TAPA COF were investigated.

Findings

A novel imine-linked covalent organic framework (DHTA-TAPA COF) has been successfully synthesized, which exhibits an exceptionally high theoretical Pb²⁺ adsorption capacity of 472.19 mg/g and demonstrates outstanding selective adsorption for lead ions, even in the presence of competing heavy metal ions. The unique structure of the COF, rich in nitrogen and oxygen functional groups, facilitates strong coordination and chelation interactions with Pb²⁺ during the adsorption process, ensuring stable immobilization of lead ions. Remarkably, after five consecutive adsorption-desorption cycles, the adsorption capacity decreased by only 15%, underscoring its excellent regenerability and practical potential as a high-performance adsorbent for the remediation of lead-contaminated water.

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.