Removal of Malachite Green Dye from Aqueous Solutions Using Zeolitic Imidazole Framework-8

Khoshnamvand, Nahid and Jafari, Ali and Kamarehie, Bahram and Mohammadi, Amir and Faraji, Maryam (2019) Removal of Malachite Green Dye from Aqueous Solutions Using Zeolitic Imidazole Framework-8. ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL, 6 (3). pp. 757-77.

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Abstract

Adsorption of malachite green (MG) using zeolitic imidazole framework-8 (ZIF-8) as a novel adsorbent was investigated in the current study. The effect of pH (3 to 11), contact time (15 to 120 min), ZIF-8 dosage (0.01 to 0.09 g/L), and competitive compounds (NaCl and NH4Cl) was studied on the adsorption of MG (25 to 200 mg/L) alongside the sonocatalyst process at 30 kHz for 60 min. Moreover, isotherm and kinetic models were investigated. Optimum conditions were obtained at pH=7, catalyst dosage=0.05 g/L, MG concentration=25 mg/L and contact time=90 min, with a removal efficiency of MG up to 95%. Experimental data were well fitted on the Freundlich and pseudo-second order model. Maximum adsorption capacity was found to be 224.14 mg/g. The effect of competitive compounds was insignificant. This study demonstrated that the sonocatalyst process in combination with ZIF-8 is a promising and efficient method for adsorption of MG from aqueous solutions.

Item Type: Article
Subjects: R Medicine > RZ Other systems of medicine
Divisions: Faculty of Medicine, Health and Life Sciences > School of Medicine
Depositing User: sobhan rezaiian
Date Deposited: 08 Sep 2019 04:29
Last Modified: 08 Sep 2019 04:29
URI: http://eprints.lums.ac.ir/id/eprint/1808

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