Efficient removal of antimonate from water by yttrium-based metal-organic framework:Adsorbent stability and adsorption mechanism investigation

Li, Q. and Li, R. and Ma, X. and Zhang, W. and Sarkar, B. and Sun, X. and Bolan, N. (2022) Efficient removal of antimonate from water by yttrium-based metal-organic framework:Adsorbent stability and adsorption mechanism investigation. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 633. ISSN 0927-7757

Full text not available from this repository.

Abstract

Efficient decontamination of Sb(V) from water has long been an urgent task owing to its grave threat to human health. Herein, Y-based MOFs (MOF-Y and NH2-MOF-Y) were synthesized for effective adsorption of Sb(V) from aqueous solution, and the stability of the Y based MOFs were estimated. Kinetic and isotherms results indicated that the pseudo-second order kinetic (R2 > 0.90) and Langmuir isotherm models (R2 > 0.97) quite well described the adsorption of Sb(V) on Y-based MOFs, revealed that the uptake of Sb(V) on Y-based MOFs were followed by a monolayer chemical adsorption process. The maximum adsorption capacities of Sb(V) calculated from the Langmuir model were 161.3 and 151.5 mg/g for MOF-Y and NH2-MOF-Y, respectively. The Y-based MOFs exhibited strong water and chemical stability, it could be utilized for removal Sb(V) under wide pH range and various concentration of Sb(V). The spent adsorbents could be successfully regenerated by NaCl (5 mol/L) solution for further utilization without damaging the crystal structure of Y-based MOFs. X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy (EDS) results revealed that the formation of inner-sphere Y-O-Sb complex between Y-oxo-clusters and Sb(V) was the dominant adsorption mechanism, while the co-precipitation of Y3+ and Sb(V) was also partially contributed the Sb(V) adsorption. High stability together with high Sb(V) adsorption capacity and excellent recyclability endow the Y-based MOFs as promising adsorbents for Sb(V) removal from wastewater.

Item Type:
Journal Article
Journal or Publication Title:
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Additional Information:
This is the author’s version of a work that was accepted for publication in Colloids and Surfaces A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Colloids and Surfaces A, 633, 2022 DOI: 10.1016/jcolsurfa.2021.127877
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1500/1505
Subjects:
ID Code:
163794
Deposited By:
Deposited On:
23 Dec 2021 09:40
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Nov 2022 10:53