Selective adsorption of rare earth ions from aqueous solution on metal-organic framework HKUST-1

Liang Zhao; Xiaoguang Duan; Muhammad R. Azhar; Hongqi Sun; Xiangchen Fang; Shaobin Wang

doi:10.1016/j.ceja.2020.100009

Selective adsorption of rare earth ions from aqueous solution on metal-organic framework HKUST-1

Liang Zhao, Xiaoguang Duan, Muhammad R. Azhar, Hongqi Sun, Xiangchen Fang, Shaobin Wang

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

Recovery of rare earth ions from wastewater holds an important strategy for the use of the precious resources. In this study, we found that a metal-organic framework (MOF), HKUST-1, exhibited a high affinity and selectivity towards adsorptive recovery of rare earth ions (Ce³⁺ and La³⁺) in aqueous solutions. The adsorbent showed a remarkable adsorption capacity of 234 mg/g and 203 mg/g for Ce³⁺ and La³⁺ at pH = 6, respectively. More importantly, its adsorption selectivity of the rare earth ions was about 87% against other metal ions. The adsorption isotherm, kinetics, and mechanism in the process were also investigated. The adsorption process can be better fit by the Freundlich model in isotherm and the pseudo-second-order model in kinetics. A plausible mechanism for the adsorption of metal ions on the HKUST-1 was proposed by considering ion exchange and the covalent bonding between the adsorbent and metal ions. The selectivity can be attributed to the different bonding abilities to metal ions.

Original language	English
Article number	100009
Number of pages	8
Journal	Chemical Engineering Journal Advances
Volume	1
DOIs	https://doi.org/10.1016/j.ceja.2020.100009
Publication status	Published - 15 Sept 2020
Externally published	Yes

Access to Document

10.1016/j.ceja.2020.100009Licence: CC BY-NC-ND

Cite this

@article{8f74b8b8ee7c410c82890008c85482a3,

title = "Selective adsorption of rare earth ions from aqueous solution on metal-organic framework HKUST-1",

abstract = "Recovery of rare earth ions from wastewater holds an important strategy for the use of the precious resources. In this study, we found that a metal-organic framework (MOF), HKUST-1, exhibited a high affinity and selectivity towards adsorptive recovery of rare earth ions (Ce3+ and La3+) in aqueous solutions. The adsorbent showed a remarkable adsorption capacity of 234 mg/g and 203 mg/g for Ce3+ and La3+ at pH = 6, respectively. More importantly, its adsorption selectivity of the rare earth ions was about 87% against other metal ions. The adsorption isotherm, kinetics, and mechanism in the process were also investigated. The adsorption process can be better fit by the Freundlich model in isotherm and the pseudo-second-order model in kinetics. A plausible mechanism for the adsorption of metal ions on the HKUST-1 was proposed by considering ion exchange and the covalent bonding between the adsorbent and metal ions. The selectivity can be attributed to the different bonding abilities to metal ions.",

keywords = "Adsorption, Cerium (III), HKUST-1, Lanthanum (III), Metal-organic framework",

author = "Liang Zhao and Xiaoguang Duan and Azhar, {Muhammad R.} and Hongqi Sun and Xiangchen Fang and Shaobin Wang",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = sep,

day = "15",

doi = "10.1016/j.ceja.2020.100009",

language = "English",

volume = "1",

journal = "Chemical Engineering Journal Advances",

publisher = "Elsevier",

}

TY - JOUR

T1 - Selective adsorption of rare earth ions from aqueous solution on metal-organic framework HKUST-1

AU - Zhao, Liang

AU - Duan, Xiaoguang

AU - Azhar, Muhammad R.

AU - Sun, Hongqi

AU - Fang, Xiangchen

AU - Wang, Shaobin

PY - 2020/9/15

Y1 - 2020/9/15

N2 - Recovery of rare earth ions from wastewater holds an important strategy for the use of the precious resources. In this study, we found that a metal-organic framework (MOF), HKUST-1, exhibited a high affinity and selectivity towards adsorptive recovery of rare earth ions (Ce3+ and La3+) in aqueous solutions. The adsorbent showed a remarkable adsorption capacity of 234 mg/g and 203 mg/g for Ce3+ and La3+ at pH = 6, respectively. More importantly, its adsorption selectivity of the rare earth ions was about 87% against other metal ions. The adsorption isotherm, kinetics, and mechanism in the process were also investigated. The adsorption process can be better fit by the Freundlich model in isotherm and the pseudo-second-order model in kinetics. A plausible mechanism for the adsorption of metal ions on the HKUST-1 was proposed by considering ion exchange and the covalent bonding between the adsorbent and metal ions. The selectivity can be attributed to the different bonding abilities to metal ions.

AB - Recovery of rare earth ions from wastewater holds an important strategy for the use of the precious resources. In this study, we found that a metal-organic framework (MOF), HKUST-1, exhibited a high affinity and selectivity towards adsorptive recovery of rare earth ions (Ce3+ and La3+) in aqueous solutions. The adsorbent showed a remarkable adsorption capacity of 234 mg/g and 203 mg/g for Ce3+ and La3+ at pH = 6, respectively. More importantly, its adsorption selectivity of the rare earth ions was about 87% against other metal ions. The adsorption isotherm, kinetics, and mechanism in the process were also investigated. The adsorption process can be better fit by the Freundlich model in isotherm and the pseudo-second-order model in kinetics. A plausible mechanism for the adsorption of metal ions on the HKUST-1 was proposed by considering ion exchange and the covalent bonding between the adsorbent and metal ions. The selectivity can be attributed to the different bonding abilities to metal ions.

KW - Adsorption

KW - Cerium (III)

KW - HKUST-1

KW - Lanthanum (III)

KW - Metal-organic framework

UR - http://www.scopus.com/inward/record.url?scp=85092296885&partnerID=8YFLogxK

U2 - 10.1016/j.ceja.2020.100009

DO - 10.1016/j.ceja.2020.100009

M3 - Article

AN - SCOPUS:85092296885

VL - 1

JO - Chemical Engineering Journal Advances

JF - Chemical Engineering Journal Advances

M1 - 100009

ER -

Selective adsorption of rare earth ions from aqueous solution on metal-organic framework HKUST-1

Abstract

Access to Document

Other files and links

Fingerprint

Cite this