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Construction of defective zirconium-based metal–organic frameworks for enhanced removal of toxic selenite: performance and mechanism studies.
- Source :
-
Journal of Colloid & Interface Science . Oct2023, Vol. 647, p488-498. 11p. - Publication Year :
- 2023
-
Abstract
- [Display omitted] The development of effective adsorbents for the adsorption and removal of toxic selenite (SeO 3 2−) from wastewater is urgently required but challenging. Herein, formic acid (FA), a monocarboxylic acid, was used as a template to construct serial defective Zr-Fumarate (Fum) -FA based on a green and facile preparation method. Physicochemical characterization shows that the defect degree of Zr-Fum-FA can be flexibly controlled by regulating the amount of FA to be added. Owing to rich defect units, the diffusion and mass transfer of guest SeO 3 2− into the channel can be boosted. Particularly, Zr-Fum-FA-6 with the most defects exhibits superior adsorption capacity (519.6 mg g−1) and rapid adsorption equilibrium (∼200 min). The adsorption isotherms and kinetics can be well described by the Langmuir and pseudo-second-order kinetic models. Moreover, this adsorbent possesses excellent resistance towards co-existing ions, high chemical stability and good applicability in a broad pH range of 3–10. Thus, our study provides a promising adsorbent for SeO 3 2−, and more importantly, it proposes a strategy for rationally tailoring the adsorption behavior of adsorbents via defect construction. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 647
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 164255068
- Full Text :
- https://doi.org/10.1016/j.jcis.2023.05.159