Open AccessComparative study on iron removal using chemically and greenly synthesised zero-valent iron nanoparticles
Author(s) -
Jismy Antony,
V. Meera,
P. RaphaelVinod
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1114/1/012082
Subject(s) - zerovalent iron , sodium borohydride , borohydride , fourier transform infrared spectroscopy , nanoparticle , reactivity (psychology) , adsorption , metal , nuclear chemistry , chemistry , materials science , chemical engineering , inorganic chemistry , nanotechnology , organic chemistry , catalysis , engineering , medicine , alternative medicine , pathology
As an adsorbent, the nano zero-valent iron (nZVI) has gained attention among researchers for the removal of pollutants like metallic ions from water. The high surface area and resulting high reactivity of nZVI make it a promising material for water/wastewater treatment. The uptake behaviour of iron on nZVI has not been investigated so far. The aim of the study is to compare greenly synthesised (GnZVI) and chemically synthesised (CnZVI) nano zero-valent iron in terms of size, functional groups and stability and to explore the feasibility of utilizing it for iron removal from water. In this study, the liquid-phase reduction technique was used to synthesis nZVI. Sodium borohydride as well as Amaranthus Dubius leaf extract were used as the reductants in this process. Characterization study of nZVI was performed using UV, FTIR, XRD and TEM. The peaks obtained at 312 nm and 316 nm in UV-Vis spectrum for chemically and greenly synthesised particles respectively, confirmed the formation of nanoparticles. The FTIR spectrum revealed the presence of C=O, C-O stretching and – CH bending vibrations of bonds. It was found that the CnZVI nanoparticles were largely spherical with size ranging from 80 nm-99 nm whereas GnZVI nanoparticles were in the range of 1nm-3nm. For an influent total iron concentration of 0.5ppm with Fe 2+ /Fe 3+ ratio as 2.5:0.5, total iron removal efficiencies of 54.00% and 35.19% were achieved by CnZVI and GnZVI respectively, at pH of 6.85 and contact time of 3 hours.