Selective Photodegradation of Antibiotic in Wastewater by Spherical Calcium Molybdate Under Visible Light Irradiation
ZHANG Huimin1, SHAN Zhan1, WANG Hong2, ZHANG Xiaoyan3
1 Department of Food and Medicine, Weihai Ocean Vocational College, Weihai 264300, Shandong,China 2 Weihai Haida Hospital Limited Company, Weihai 264200,Shandong,China 3 School of Chemical Engineering and Materials, Quanzhou Normal University, Quanzhou 362000, Fujian, China
Abstract: Antibiotics have played an important role in the prevention and treatment of diseases. However, with the use of antibiotics, the amount of antibiotic residues in wastewater is increasing day by day, and the water environment is polluted, which affects human health. On the other hand, a large number of egg shells are produced in daily life and industrial production, which seriously pollutes the environment. In this work, wool spherical calcium molybdate photocatalytic material was successfully prepared by using biological waste egg shell as reactor and calcium source under mild conditions. The samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectra, scanning electron microscopy and Brunauer-Emmett-Teller analysis, etc. The effect of ammonium molybdate, egg membrane and cetyltrimethylammonium bromide with different amount was studied by photocatalytic degradation of tetracycline hydrochloride in wastewater. The results show that the surface area of CaMoO4 was the largest and the photocatalytic performance was the highest by low temperature oil bath method combined with 650 ℃ calcination process when the mass ratio of ammonium molybdate, egg membrane and cetyltrimethylammonium bromide is 30∶10∶1. The degradation of 70% tetracycline hydrochloride in wastewater can be completed by wool ball calcium molybdate material for 1.5 h, and the degradation rate still reaches more than 68% after repeated experiment six times. In addition, the wool ball calcium molybdate photocatalytic material is environmental friendly and has no antibacterial activity, which can be used for selective degradation of antibiotics in wastewater.
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2022, Vol. 36 
