Abstract:
Nano sized Zero Valent Iron (Fe0, NZVI), renowned for its high surface area and specific affinity for nitrate, a ubiquitous contaminant in drinking water. In this study, Nitrate reduction was performed using freshly synthesized NZVI, Iron-Nickle (Fe-Ni) and Iron-Copper (Fe-Cu) bimetallic Nanoparticles (NPs) using chemical reduction method. To avoid oxidation of NPs, all the synthesis and batch reactions were performed in a glove box purged with an inert atmosphere of nitrogen. The compositional and structural properties of the NPs were characterized using Scanning Electron Microscopy (SEM), X-Ray Fluorescence(XRF), and X-Ray Diffraction (XRD), confirming a particle size distribution of20-50 nm. From comparative analysis it was revealed that compared to NZVI, the bimetallic Fe-Cu and Fe-Ni NPs exhibited superior catalytic activity for nitrate reduction, with Fe-Ni demonstrating the highest efficiency. The effect of dopant concentration was evaluated by trying various metal loadings (2, 4, 6, 8,and 10 wt %) of Cu and Ni on the Fe° matrix. Maximum catalytic efficiency was observed at an optimum metal loading of 4%. Moreover, the effects of environmental parameters on the nitrate-reduction ability of our synthesized NPs were investigated, confirming maximum efficiency under acidic pH conditions and at lower temperatures. The experimental data derived from our nitrate reduction studies exhibited strong correlation with both the Langmuir and Freundlich adsorption isotherm models. Kinetic analysis determined that there action followed a pseudo-second-order model.
Page(s):
126-126
DOI:
DOI not available
Published:
Journal: 1st International Conference on "Recent Advances in Green Biotechnology and Climate Resilience", September 15-16, 2025, Volume: 1, Issue: 1, Year: 2025
Keywords:
Bimetallic Nanoparticles
,
Nitrate reduction
,
Nanosized Zero Valent Iron NZVI
,
Adsorption Isotherm
,
Pseudosecond order kinetics