Facile synthesis of zirconium-organic frameworks@biomass-derived porous graphitic nanocomposites: Arsenic adsorption performance and mechanism

Authors
Pandi, KalimuthuLee, Da-wonChoi, Jaeyoung
Issue Date
2020-09-15
Publisher
ELSEVIER
Citation
JOURNAL OF MOLECULAR LIQUIDS, v.314
Abstract
This work describes the preparation of novel adsorbents based on a natural biomass-derived porous graphic carbon (PGC) as a backbone for the interfacial growth of zirconium-organic framework (UiO-66) using an in situ synthetic route for the adsorption of total arsenic from water. The pristine UiO-66 and their PGC loaded nanocomposites (UiO-66@PGCx%, where x = (5, 10, 20, and 50) % (wt/wt), were tested for the adsorption of As (III)/As(V) and batch adsorption results show that the UiO-66@PGC20% nanocomposite achieves superior removal efficiencies for As(III)/As(V), compared with other developed nanocomposites and pristine UiO-66. The developed adsorbents are highly pH dependent and selective in common co-existing anions except for F-, PO43- and humic acid. The adsorption data was fitted using Langmuir isotherm and pseudo-second-order kinetic models. The adsorption mechanism was revealed through FTIR and XPS analysis, and the chemisorption of As(III)/As(V) on the surface of the UiO-66@PGC20% nanocomposite was explored. The UiO-66@PGC20% nanocomposite exhibits better chemical stability under the adsorption-desorption process and similar to 500 and 651 bed volumes of As(III)/As(V) contaminated water were treated in continuous fixed-bed column, also reduced the As(III)/As(V) concentration to <10 mu g/L, which indicates that the UiO-66@PGC20% nanocomposite is a practical adsorbent in the field of arsenic remediation. (C) 2020 Elsevier B.V. All rights reserved.
Keywords
HYDROTHERMAL CARBONIZATION; EFFICIENT REMOVAL; CARBON MATERIALS; UIO-66; WATER; SURFACE; WASTE; SUPERCAPACITOR; COMPOSITES; MEMBRANES; HYDROTHERMAL CARBONIZATION; EFFICIENT REMOVAL; CARBON MATERIALS; UIO-66; WATER; SURFACE; WASTE; SUPERCAPACITOR; COMPOSITES; MEMBRANES; Metal organic-framework; UiO-66; Porous graphitic carbon; Nanocomposites; Arsenic adsorption; Breakthrough analysis
ISSN
0167-7322
URI
https://pubs.kist.re.kr/handle/201004/118115
DOI
10.1016/j.molliq.2020.113552
Appears in Collections:
KIST Article > 2020
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