An innovative and efficient strategy for removing Congo red using magnetic hollow Zn/Co zeolitic imidazolate framework composite

Yu Su; Yanjie Wang; Lan Ding; Yanhua Chen; Daqian Song

doi:10.1016/j.envres.2024.120399

An innovative and efficient strategy for removing Congo red using magnetic hollow Zn/Co zeolitic imidazolate framework composite

Environ Res. 2024 Nov 21:120399. doi: 10.1016/j.envres.2024.120399. Online ahead of print.

Authors

Yu Su¹, Yanjie Wang², Lan Ding³, Yanhua Chen¹, Daqian Song¹

Affiliations

¹ College of Chemistry, Jilin Province Research Center for Engineering and Technology of Spectral Analytical Instruments, Jilin University, Qianjin Street 2699, Changchun 130012, China.
² Food Laboratory of Zhongyuan, Luohe, Henan, 462300, China.
³ College of Chemistry, Jilin Province Research Center for Engineering and Technology of Spectral Analytical Instruments, Jilin University, Qianjin Street 2699, Changchun 130012, China. Electronic address: dinglan@jlu.edu.cn.

PMID: 39579850
DOI: 10.1016/j.envres.2024.120399

Abstract

The discharge of wastewater containing Congo red (CR) poses a significant threat to aquatic ecosystems and human health, underscoring the urgent need for effective removal methods. In this study, we have developed a novel strategy for efficient removing CR, utilizing the synthesized magnetic hollow Zn/Co zeolitic imidazolate framework composite (MH-ZIF). Comprehensive characterization of MH-ZIF and comparison with contrasting materials were conducted. The adsorption behavior of MH-ZIF towards CR followed the pseudo-second-order kinetic model and Langmuir isothermal adsorption model, demonstrating monolayer chemisorption. Remarkably, MH-ZIF exhibited an impressive adsorption capacity of 1167.9 mg·g^-1 for CR at 293 K. The addition of merely 0.15 g·L^-1 of MH-ZIF achieved nearly complete adsorption of CR within a concentration of 150 mg·L^-1. With the assistance of an external magnetic field, CR adsorbed on MH-ZIF can be effectively and swiftly removed within just 30 s. Hence, MH-ZIF demonstrates great promise in effectively removing CR from wastewater, attributed to its high adsorption capacity, selectivity, and magnetic properties.

Keywords: Adsorption; Congo red; Hollow structure; Zeolitic imidazolate framework.