Dual Functionality Of Cobalt Doped Nickel Oxide Nanoparticles In Treatment Of Waste Water Free From P-Nitrophenol And Microbes

Abstract

Wastewater treatment is critical for mitigating the environmental impacts of industrial and domestic effluents while conventional treatment technologies effectively reduce organic load and nutrient concentrations in nanotechnology. This study critically examines the dual impacts of wastewater treatment technologies emphasizing the potential of Co–NiO NPs to advance sustainable low-carbon and high-performance effluent remediation. The desirable NPs were prepared hydrothermally and their properties were investigated using XRD, SEM, EDS, BET, UV-Vis, TGA, XPS and FTIR techniques. The average particle size of NiO NPs and Co-NiO NPs are 14.58nm and 7.06nm respectively. The UV absorbance studies shown a strong absorption at 370nm and 375nm respectively and the band gap energy values of NiO NPs and Cu-NiO NPs are 3.36eV and 3.30eV. The doping of cobalt in to the NiO NPs had decreased the band gap energy(3.36eV)  resulting that Co-NiO NPs can show more effectiveness in removal of PNP. In addition to that the Co-NiO NPs bioactivity was tested against three bacterial strains E.coli, B.coagulans and A.niger shown to be more effective. Optimization of the adsorption process was conducted by modulating the agitation length of 120 minutes with the Co-NiO NPs dose of 0.1 gm, the solution pH of 5 and the PNP starting concentration of 10 mg/L resulted in a 100% conversion of PNP degradation rate and on the other hand A.niger shown enhanced antifungal activity with zone of inhibition(ZOI) 16mm compared to  NiO NPs  ZOI with 13mm.