Ma Yongmei, Li Siyue
Research Center for Ecohydrology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences Chongqing 400714 China
RSC Adv. 2019 Oct 18;9(57):33519-33524. doi: 10.1039/c9ra08145c. eCollection 2019 Oct 15.
The removal of antibiotic residues in the aquatic environment is still a big challenge in environmental protection. Here, we developed NaYF:Yb,Tm@TiO as a highly efficient photocatalyst for photocatalytic degradation of ciprofloxacin (CIP), a representative antibiotic in water under simulated solar irradiation. NaYF:Yb,Tm@TiO can efficiently utilize a broad spectrum of solar energy to improve the efficiency of ciprofloxacin removal from an aquatic environment. The optimum operation conditions of photocatalyst dosage, pH value, and initial concentrations of CIP were determined by a series of contrast experiments. The dynamic process of CIP removal was monitored by UV-vis spectrophotometry, and can be well predicted by a pseudo first order model. The optimal conditions of photocatalyst dosage, initial concentration of CIP and pH value for CIP photocatalytic degradation were 1 g L, 10 M and 8, respectively. This study provides an efficient method for antibiotic removal and enables a promising strategy for other organic water pollutant treatments.
去除水环境中的抗生素残留仍然是环境保护中的一项重大挑战。在此，我们开发了NaYF:Yb,Tm@TiO作为一种高效光催化剂，用于在模拟太阳辐射下光催化降解水中具有代表性的抗生素环丙沙星（CIP）。NaYF:Yb,Tm@TiO能够有效利用广谱太阳能，提高从水环境中去除环丙沙星的效率。通过一系列对比实验确定了光催化剂用量、pH值和CIP初始浓度的最佳操作条件。采用紫外-可见分光光度法监测CIP去除的动态过程，并用伪一级模型进行了很好的预测。CIP光催化降解的光催化剂用量、CIP初始浓度和pH值的最佳条件分别为1 g L、10 μM和8。本研究为抗生素去除提供了一种有效方法，并为其他有机水污染物处理提供了一种有前景的策略。
