[Retracted] Degradation of Toxic Dye and Antimicrobial and Free Radical Potential of Environmental Benign Zinc Oxide Nanoparticles

Abstract

Several industries have become major contributors to waterbody contamination due to the improper removal of dyes and effluents into water bodies. Due to their carcinogenic properties and low biodegradability, dye degradation is a considerable danger to people, animals, and the oceanic environment. As part of this study, Andrographis paniculata leaf extract was used as a reducing and stabilizing agent to synthesize zinc nanoparticles and degrade dyes such as methyl red and eosin. Zinc oxide nanoparticles (ZnONPs) showed a surface plasmon resonance peak at 430 nm in the UV spectrum. The FTIR result showed a band at 597.93 cm−1 that confirmed the formation of zinc nanoparticles. AFM results revealed spherical ZnONPs. The SEM results predicted an average particle size of 60 nm for crystalline particles. Biologically synthesized zinc nanoparticles exhibited greater antibacterial activity against Pseudomonas spp. and Proteus spp. but lesser activity against Klebsiella spp. and S. aureus. At 1000 μg/ml concentration, ZnONPs had the highest antioxidant activity of 45.34%. An ultraviolet-visible spectrophotometer measured dye degradation progress between 300 and 800 nm. For methyl red, the maximum absorption peak was measured at 415 nm, and for eosin, the maximum peak value was measured between 500 and 515 nm.

Effects of in ovo Administration of Zinc Oxide Nanoparticles and Vitamin C on Hatchability Performance and Redox Status in Day Old Kadaknath Hatchlings

“…Nearly rod shaped nanoparticles was recorded with an average size of 68 nm. These results were consistent with the previously reported study of Kumar et al (2022).…”

Green Synthesis, Characterization and Bioactivity of Mangifera indica Seed-Wrapped Zinc Oxide Nanoparticles

“…Meanwhile, peaks were shown with 2θ values of 31.4°, 34.0°, 35.9°, 47.1°, 56.2°, 62.5° and 68.7° which corresponds to (100), (002), (101), (102), (110), (103) and (200) respectively. ZnO NPs synthesized from Andrographis paniculate, Chamaecostus cuspidatus and Agathosma betulina showed an identical XRD pattern [ 33 , 41 , 42 ].…”

“…In this context, researchers have initiated to utilize the biowaste materials from various plant and fruit sources to synthesize metal-based and metallic oxide nanoparticles. Several ways for generating ZnO NPs utilizing various plant extracts have been established by researchers [ 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ]. We report here on the large - scale production of ZnO NPs by using an aqueous extract of mango seed powder as the raw material.…”

“…Gram-positive B. subtilis and Gram-negative E. coli strains were used in an experiment to test the antibacterial activity of synthesized ZnO NPs. The experiment was conducted using the agar well diffusion method [ 41 ]. The nutritional broth was contaminated with the clinical pathogens and cultivated for a whole day at 37 °C.…”

“…The biosynthesis of ZnO NPs has been shown utilizing several plant extracts, including Lobelia leschenaultiana [ 32 ], Agathos mabetulina [ 33 ], Laurus nobilis [ 34 ], Moringa olifera [ 35 ], Acalypha indica [ 36 ], Aspalathus linearis [ 37 ], Carica papaya [ 38 ], green tea leaves [ 39 ], Euphorbia jatropa latex [ 40 ], Andrographis paniculata [ 41 ], Chamaecostus cuspidatus [ 42 ]. Compared to the above sources, the advantage of preparing ZnO NPs using mango seed extracts has been cost-effectiveness, as rinds and seeds are considered waste materials.…”