Triclosan detoxification through dechlorination and oxidation via microbial Pd-NPs under aerobic conditions

The present study focuses on the successful preparation of microbial palladium nanoparticles (Pd-NPs). The even distribution of Pd in the periplasmic space of B. megaterium Y-4 cells is characterized using a transmission electronic microscopy (TEM) and scanning electron microscope (SEM). X-Ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) revealed the domination of Pd (0) in Pd-NPs. The microbial Pd-NPs were selected to detoxify triclosan (TCS). Liquid chromatography-mass spectrometry (LC-MS) was used to analyze the intermediate products of dechlorination and oxidization. Free radicals quenching and 5,5-dimethyl-1-pyrroline N-oxide (DMPO) capturing experiments confirmed the crucial contribution of atomic H center dot and O-2(center dot-) to TCS degradation. Besides, TCS degradation by microbial Pd-NPs could alleviate the cytotoxicity of TCS polluted water. Meanwhile, great circulating utilization of microbial Pd-NPs was obtained in degrading TCS. Corresponding findings in the present study could provide new insight into the role of microbial Pd-NPs in detoxifying pollutants.

Automated summary

This study successfully prepared microbial palladium nanoparticles for detoxifying triclosan. Characterization of Pd-NPs using TEM, SEM, XPS, and XRD revealed their distribution and composition, confirming their crucial role in degrading TCS and reducing its toxicity in polluted water. The findings provide new insights into the utilization of microbial Pd-NPs for detoxifying pollutants.