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



Khoshnamvand N1, 2 ; Jafari A1 ; Kamarehie B1 ; Mohammadi A3 ; Faraji M4, 5
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, Faculty of Health and Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran
  2. 2. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Public Health, School of Nursing and Midwifery, Maragheh University of Medical Sciences, Maragheh, Iran
  4. 4. Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran
  5. 5. Department of Environmental Health, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran

Source: Environmental Processes Published:2019


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. © 2019, Springer Nature Switzerland AG.
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