Visible-light-driven photocatalytic inactivation of bacteriophage f2 by Cu-TiO2 nanofibers in the presence of humic acid
Visible-light-driven photocatalytic inactivation of bacteriophage f2 by Cu-TiO2 nanofibers in the presence of humic acid
复制标题
腐殖酸存在下 Cu-TiO2 纳米纤维可见光驱动光催化灭活噬菌体 f2
DOI：
10.1016/j.jes.2018.09.017
复制
发表时间：
2019-03-01
影响因子：
6.9
通讯作者：
Zheng, Xiang
中科院分区：
文献类型：
--
作者：
Cheng, Rong;Kang, Mi;Zheng, Xiang
饮用水中的致病病毒对公众健康构成极大威胁。可见光驱动光催化技术是一种很有前途的病毒灭活技术。然而，现有的光催化抗病毒研究大多是在单组分体系中进行的，忽略了实际水体中广泛存在的天然有机物的影响。本论文制备了电纺铜纳米纤维作为光催化剂，并首次对其在腐植酸(HA)存在下的光催化抗病毒性能进行了全面的研究。在反应过程中对反应混合物的性质进行了测试。此外，还对混合系统光催化消毒的安全性、可靠性和稳定性进行了评价。结果表明，随着HA浓度的增加，去除病毒的效率降低。反应溶液的类型，如PbS缓冲液或水，对去除效果没有显著影响。在酸性条件下，光催化剂与病毒之间的静电作用力增强，脱毒效率较高。随着反应时间的延长，溶液中的pH值先上升后趋于稳定，电导率保持稳定，溶解氧先上升后下降。安全测试表明，释放到溶液中的铜离子浓度低于国际标准规定。没有观察到光再活化现象，HA的加入显著降低了光催化剂的再利用效率。(C)2018中国科学院生态环境科学研究中心。爱思唯尔出版公司(Elsevier B.V.)
Pathogenic viruses in drinking water are great threats to public health. Visible-lightdriven photocatalysis is a promising technology for virus inactivation. However, the existing photocatalytic antiviral research studies have mostly been carried out in single-component systems, neglecting the effect of natural organic matter, which exists widely in actual water bodies. In this paper, electrospun Cu-TiO2 nanofibers were prepared as photocatalysts, and their photocatalytic antiviral performance in the presence of humic acid (HA) was comprehensively studied for the first time. The properties of the reaction mixture were measured during the reaction. In addition, the safety, reliability and stability of photocatalytic disinfection in the mixed system were evaluated. The results showed that the virus removal efficiency decreased with the increase of the HA concentration. The type of reaction solution, such as PBS buffer solution or water, did not affect the removal efficiency noticeably. Under acidic conditions, the electrostatic forces between photocatalysts and viruses were strengthened, leading to higher virus removal efficiency. As the reaction time went on, the pH value in the solution increased first and then tended to be stable, the conductivity remained stable, and the dissolved oxygen increased first and then decreased. The safety test showed that the concentration of Cu ions released into the solution was lower than specified by the international standards. No photoreactivation was observed, and the addition of HA significantly reduced the reutilization efficiency of the photocatalysts. (C) 2018 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.