A GO-CS@MOF [Zn(BDC)(DMF)] material for the adsorption of chromium(VI) ions from aqueous solution. (1st November 2018)

• Record Type: Journal Article
• Authors: Samuel, Melvin S.; Subramaniyan, Vasudevan; Bhattacharya, Jayanta; Parthiban, C.; Chand, Santanu; Singh, N.D. Pradeep
• Is Part Of: Composites. Number 152(2018)
• Page Start: 116
• Page End: 125
• Publication Date: 2018-11-01
• Subjects: MOF [Zn(BDC)(DMF)] -- Chromium(VI) -- Isotherm -- Kinetics -- Thermodynamics; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2018.06.034
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: In the present study, a novel nanocomposite adsorbent material was synthesized using chitosan (CS), graphene oxide (GO) and metal organic framework (MOF [Zn(BDC)(DMF)]) for the adsorption of Chromium (VI) heavy metal from aqueous solution. The characterization of the prepared GO-CS@MOF [Zn(BDC)(DMF)] was accomplished by powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET), followed by Cr(VI) adsorption-desorption studies. Experimental parameters such as effect of pH, temperature, contact time, adsorbent dosage and shaking speed were optimized. The GO-CS@MOF [Zn(BDC)(DMF)] showed an adsorption capacity of 144.92 mg/g for Cr(VI) at pH 3.0. Thermodynamic properties (ΔG o, ΔH o, ΔS o ) have been calculated and the process is found to be endothermic, favourable and spontaneous. The adsorption study of Cr(VI) by GO-CS@MOF [Zn(BDC)(DMF)] comprises both kinetic and isotherm studies. The equilibrium adsorption followed Langmuir model and adsorption reaction was found to be pseudo-second order confirming chemisorption. The developed GO-CS@MOF [Zn(BDC)(DMF)] nanocomposite material will serve as a new type of platform for removing Cr(VI) from wastewater.