Abstract
BackgroundIn this present work, we synthesized zero-valent iron nanoparticles (ZVIN) using reproducible Calotropis gigantea (CG) flower extract served as both reducing and stabilizing agent by completely green approach. ZVIN are widely used in contaminated water treatment and can be prepared by several different methods.MethodIron nanoparticles formed in this method are mainly ZVIN and were characterized by the various physicochemical techniques, viz, ultraviolet-visible absorption spectroscopy (UV-vis), Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX).ResultsFT-IR and UV-vis absorption spectra reveal that the polyphenols present in the CG flower extract may be responsible for the reduction and stabilization of the ZVIN. SEM images show some agglomeration among the particles and the average size of the particles in the range of 50–90 nm. ZVIN tend to agglomerate, resulting in a significant loss of reactivity. To overcome this problem, we have synthesized ZVIN that are immobilized on biomaterial with the help of chitosan. This low-cost sorbent was used to remove organic pollutants from waste water.ConclusionsHerein, we report the percentage of removal of methylene blue (MB) and aniline by synthesized sorbent from contaminated water. The adsorption isotherms of Langmuir and Freundlich models have been used to explain experimental equilibrium adsorption data. The adsorption of MB and aniline on sorbent follows pseudo-second order kinetics.
Highlights
In this present work, we synthesized zero-valent iron nanoparticles (ZVIN) using reproducible Calotropis gigantea (CG) flower extract served as both reducing and stabilizing agent by completely green approach
We report the green synthesis of ZVIN using Calotropis gigantea (CG) flower extract as both reducing and stabilizing agent
Along with prominent diffraction peaks of iron nanoparticles, which demonstrate the crystallinity of ZVIN, here exist some low-intensity peaks in between the 2Θ value of 20°–25° corresponding to the organic matter coated on the surface of ZVIN (Fazlzadeh et al 2017). These results show that the CG flower extract is successfully used for the synthesis and stabilization of ZVIN which can be reconciled by Fourier transform-infrared spectroscopy (FT-IR) analysis
Summary
We synthesized zero-valent iron nanoparticles (ZVIN) using reproducible Calotropis gigantea (CG) flower extract served as both reducing and stabilizing agent by completely green approach. Apart from that, zero-valent iron nanoparticles (ZVIN) follows the maximal tenets of green chemistry as a non-toxic, inexpensive, and environmentally compatible material (Li et al 2006; Zhipan et al 2014). Because of attractive qualities like electron donating property during the oxidation of Fe2+ to Fe3+ and existence of various mineral forms of iron, the ZVIN have been found to be more important in the adsorption and removal of environmental pollutants (Chicgoua et al 2012; Kumar et al 2014). ZVIN are boon especially in alleviating contaminants such as dyes, organic pesticides, halogenated organic compounds, inorganic ions like nitrate, fluoride, and sulfate, viruses, nitro-aromatic compounds, PCBs and heavy metals such as Pb, As, Cr, and Cd (Zheng et al 2011) from polluted water. Carbonsupported ZVIN are used in the removal of uranium from natural and synthetic water (Richard and Crane 2014)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
