Publications by authors named "Palaniyappan Jayanthi"

In this study, we report the development of a novel CuO(3 wt%)/CoFeO nanocubes (NCs) photocatalyst through simple co-precipitation and wet impregnation methods for the efficient photocatalytic degradation of triclosan (TCS) pollutants. Initially, rod-shaped bare CoFeO was synthesized using a simple co-precipitation technique. Subsequently, CuO was loaded in various percentages (1, 2, and 3 wt%) onto the surface of bare CoFeO nanorods (NRs) via the wet impregnation method.

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Acetamiprid is a broad-spectrum insecticide, belonging to the neonicotinoid compounds group, which has been extensively applied throughout the globe. Recently, indiscriminate use of these compounds was reported to cause fatal impacts on non-targeted soil organisms. Hence, the present study aimed to examine the impact of acetamiprid on Indian indigenous earthworm, Perionyx excavatus.

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Article Synopsis
  • Green synthesis of zinc oxide nanoparticles (ZnO NPs) was performed using Brassica oleracea var. botrytis leaf extracts, demonstrating an eco-friendly approach for dye removal and antimicrobial applications.
  • The synthesized BO-ZnO NPs exhibited characteristics such as a hexagonal structure, particle size of about 52 nm, and effective photocatalytic activity, with 80% methylene blue dye degradation under sunlight within 75 minutes at pH 8.
  • Antimicrobial tests revealed inhibition zones against several bacterial pathogens, and larvicidal activity was confirmed against Culex quinquefasciatus larvae, indicating the potential use of BO-ZnO NPs in environmental and health-related applications.
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Extensive use of neonicotinoid insecticides in recent decade had contaminated water and soil systems and poses serious environmental and health risk. Microbial degradation of toxic contaminants in the environment has been established as a sustainable tool towards its remediation. Under this context, the present study focused on the biodegradation of neonicotinoid insecticide acetamiprid, by bacterial strain Brucella intermedia PDB13 isolated from the gut of the acetamiprid exposed earthworms.

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Herein, we report an AgO (3 wt%)-loaded ZnFeO photocatalysts synthesized by co-precipitation and incipient wet impregnation approach for acetamiprid degradation, antibacterial, antioxidant, and toxicity assay. Initially, bare ZnFeO nanostructures were made through a simple co-precipitation method. In the second step, 3 wt% of various transition metal oxides (CuO, ZrO, and AgO) were embedded on the surface of ZnFeO photocatalysts via a wet impregnation method.

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A simple, efficient, and ecofriendly method was employed to synthesize TiO/ZrO/SiO ternary nanocomposites using leaf extract (PYLE) that shows improved photocatalytic and antibacterial properties. The characterization of the obtained nanocomposites was done by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, field-emission scanning electron microscopy (FE-SEM), and energy-dispersive X-ray spectroscopic (EDS) analysis. The synthesized ternary nanocomposites with nanoscale pore diameters were investigated for the elimination of Reactive Red 120 (RR120) dye.

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Long-term monitoring is essential to assess the patterns and distribution of the residues of organochlorine pesticides (OCPs) in biota. Bird eggs have several advantages than other environmental matrixes, which have been used extensively to portray the accumulation and distribution of OCPs. The present study investigated the organochlorine pesticide (OCP) residues in eggs of 22 species of terrestrial birds collected from Tamil Nadu, India.

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Metal nanoparticles obtained from green route are gaining significant prominence as a result of their potential applications in nanomedicine and material engineering. Overall metal nanoparticles studied, silver nanoparticles (AgNPs) clutch prominent place in nanoparticles research field. Herein, we have reported the green synthesis of Saccharum officinarum leaf biomass extract-mediated synthesis of AgNPs.

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In the present study, the use of silver oxide nanoparticles (AgO NPs) synthesized using Ficus benghalensis prop root extract (FBPRE) as a reducing and stabilizing agent is reported and evaluated for its antibacterial activity against dental bacterial strains. The effects of pH, extract concentration, metal ion concentration, and contact time were studied to confirm the optimum production of AgO NPs. Our results suggest that, by increasing the extract concentration and the time frame, there will be a significant increase in the formation of nanoparticles.

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Organochlorine pesticide residues were determined in 10 species of fishes caught at Cochin and Rameshwaram coast, and sold in Coimbatore, Tamil Nadu, India. Species were selected on the basis of their regular availability throughout the year and commercial value. A total of 389 fishes were analyzed for organochlorine residues and their suitability for human consumption was evaluated.

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