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Synthesis of zeolitic imidazolate framework-8 (ZIF-8) using different solvents for lead and cadmium adsorption

Ahmad, Siti Zu Nurain and Wan Salleh, Wan Norharyati and Yusof, Norhaniza and Mohd. Yusop, Mohd. Zamri and Hamdan, Rafidah and Ismail, Ahmad Fauzi (2023) Synthesis of zeolitic imidazolate framework-8 (ZIF-8) using different solvents for lead and cadmium adsorption. Applied Nanoscience (Switzerland), 13 (6). pp. 4005-4019. ISSN 2190-5509

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Official URL: http://dx.doi.org/10.1007/s13204-022-02680-7

Abstract

The current study is focused on the facile synthesis of zeolitic imidazolate framework-8 (ZIF-8) at room temperature using three different solvents: ammonia solution (ZIF-8 (N)), aqueous solution (ZIF-8 (H)), and methanol (ZIF-8 (M)). The ZIF-8s produced have high crystallinity with different sizes and shapes. The morphology of ZIF-8 (H) resembled the mixture of cubic and the rhombic dodecahedron with truncated corners, whereas ZIF-8(M) occurred as the most stable rhombic dodecahedron, and ZIF-8(N) appeared as cubes with truncated corners. ZIF-8 (N) had the largest average particle size of 573 nm, followed by ZIF-8 (H) and ZIF-8 (M) with average sizes of 108 nm and 62 nm, respectively. ZIF-8 (N) showed a rapid Pb(II) and Cd(II) adsorption, within 15 min, while ZIF-8(H) achieved Pb(II) and Cd(II) equilibrium within 240 min, and 300 min for ZIF-8 (M). The adsorption of Pb(II) and Cd(II) is best fitted with the Langmuir isotherm and pseudo-second-order kinetic model. The maximum adsorption capacities for Pb(II) and Cd(II) sorption were 454.55 and 312.50 mg/g for ZIF-8 (H), 434.78 and 277.78 mg/g for ZIF-8 (M), respectively, and 476.19 and 263.16 mg/g for ZIF-8 (N), respectively. All of the prepared ZIF-8s showed a promising competency as adsorbents for the removal of Pb(II) and Cd(II) from an aqueous solution.

Item Type:Article
Uncontrolled Keywords:Adsorption, Heavy metals, MOF, Solvent effect, Wastewater treatment, ZIF
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:105120
Deposited By: Widya Wahid
Deposited On:02 Apr 2024 07:09
Last Modified:02 Apr 2024 07:09

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