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Synthesis of r-GO/PANI/ZnO based material and its application in the treatment of wastewater containing Cd2+ and Cr6+ ions
Ist Teil von
Separation science and technology, 2022-10, Vol.57 (15), p.2420-2431
Ort / Verlag
Abingdon: Taylor & Francis
Erscheinungsjahr
2022
Link zum Volltext
Quelle
Taylor & Francis Journals Auto-Holdings Collection
Beschreibungen/Notizen
This work provides an environmentally friendly synthesis of zinc oxide nanoparticles (ZnO NPs) using Syzygium cumini (Jamun) leaves extract and their incorporation with reduced graphene oxide (r-GO) and polyaniline (PANI) to form r-GO/PANI/ZnO. XRD, SEM, EDX, and FTIR techniques were used to characterize the r-GO/PANI/ZnO nanocomposite, which was then used to remove hazardous Cd
2+
and Cr
6+
ions from aqueous media. FTIR spectroscopy has confirmed the presence of N-H, C = O, C = N, C = C, C-C, C-Zn, Zn-O etc. bonds on the surface of r-GO/PANI/ZnO; the XRD pattern of r-GO/PANI/ZnO indicates its amorphous nature. Different batch parameters were used to perform the adsorption-based removal. The optimal conditions for maximum water decontamination have been identified. Different isotherm and kinetic models were used to test the experimental findings. Maximum adsorption capacities of r-GO/PANI/ZnO were found to be 12.033 and 22.522 mg/g for Cd
2+
and Cr
6+
ions, whereas rate constants (k
2
) observed as 1.547 and 84.033 g/mg/min, respectively.