球状钼酸钙在可见光下选择性光催化降解废水中的抗生素

Selective Photodegradation of Antibiotic in Wastewater by Spherical Calcium Molybdate Under Visible Light Irradiation

抗生素在人类预防和诊治疾病方面发挥了重要作用。但抗生素的大量使用,导致废水中抗生素残留量增多,水体受到污染,影响人类身体健康。另一方面,生活和工业生产中产生大量的鸡蛋壳,严重污染环境。以生物废弃物鸡蛋壳为反应器和钙源,在温和条件下可制备出毛线球状CaMoO_(4)光催化材料,并用X射线衍射、傅里叶变换红外光谱、拉曼光谱、场发射扫描电子显微镜、Brunauer-Emmett-Teller对样品进行一系列表征,通过光催化降解废水中盐酸四环素研究了不同质量的钼酸铵、鸡蛋膜、十六烷基三甲基溴化铵对CaMoO_(4)光催化性能的影响。实验结果表明,采用低温油浴法结合650℃煅烧工艺,钼酸铵、鸡蛋膜、十六烷基三甲基溴化铵的质量比为30∶10∶1时,CaMnO_(4)的比表面积最大,光催化性能最高。毛线球状CaMoO_(4)材料经1.5 h即可完成废水中70%盐酸四环素的降解,且经过六次重复实验后,降解率仍可达68%以上。除此之外,毛线球状CaMoO_(4)光催化材料无抗菌性,有良好的环境友好性,可用于废水中抗生素的选择性降解。

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 CaMoO_(4) 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.