期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 28, 期 10, 页码 12119-12130出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-10833-w
关键词
Biosynthesis; Photocatalytic degradation; p-Nitrophenol; UV irradiation; ZnO nanoparticles
This study successfully degraded p-nitrophenol using biologically synthesized zinc oxide nanoparticles as a photocatalyst. Optimum conditions for the degradation were found to be a ZnO photocatalyst concentration of 0.1 g/L, pH 11, and H2O2 concentration of 5 mM.
The present work deals with the photocatalytic degradation of p-nitrophenol as it is a United States Environmental Protection Agency-listed priority pollutant and has adverse environmental and health effects. To eradicate the detrimental environmental impact of p-nitrophenol, the biologically synthesized ZnO nanoparticles were used as a photocatalyst. The degradation of p-nitrophenol was confirmed by decreasing the absorbance value at a characteristic wavelength of 317 nm using the UV-vis spectrophotometer. Reaction parameters such as ZnO photocatalyst concentration of 0.1 g/L at pH 11 in the presence of H2O2(5 mM) were found to be optimum conditions for p-nitrophenol degradation. The photocatalytic degradation was slowly enhanced in the presence of H(2)O(2)as an electron acceptor. The kinetics of nitrophenol degradation was studied, which follows the pseudo-first-order reaction. The photocatalytic degradation of p-nitrophenol was characterized by using total organic carbon, chemical oxygen demand, and high-performance liquid chromatography analyses. This method is found to be effective as it is environmentally friendly, free of toxic chemicals.
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