Sayadi Mohammad Hossein, Ahmadpour Najmeh, Homaeigohar Shahin
Department of Environmental Engineering, Faculty of Natural Resources and Environment, University of Birjand, Birjand 9717434765, Iran.
Department of Environmental Engineering, Faculty of Agriculture and Natural Resources, Ardakan University, Ardakan 8951895491, Iran.
Nanomaterials (Basel). 2021 Jan 24;11(2):298. doi: 10.3390/nano11020298.
This study aimed to synthesize a new magnetic photocatalytic nanosystem composed of Ag-CuFeO@WO and to investigate its photodegradation efficiency for two drug pollutants of Gemfibrozil (GEM) and Tamoxifen (TAM) under Ultraviolet (UV) light irradiation. In this regard, the effect of pH, catalyst dosage, and drug concentration was thoroughly determined. The largest photodegradation level for GEM (81%) and TAM (83%) was achieved at pH 5, a photocatalyst dosage of 0.2 g/L, drug concentration of 5 mg/L, and contact time of 150 min. The drug photodegradation process followed the pseudo first-order kinetic model. In addition to the photodegradation effect, the nanocomposites were proved to be efficient in terms of antibacterial activity, proportional to the Ag doping level. The Ag-CuFeO@WO nanocomposite exhibited a stable, efficient performance without an obvious catalytic loss after five successive cycles. Taken together, the developed magnetic photocatalyst is able to simultaneously disinfect wastewater streams and to degrade pharmaceutical contaminants and thus shows a promising potential for purification of multi-contaminant water systems.
本研究旨在合成一种由Ag-CuFeO@WO组成的新型磁性光催化纳米系统，并研究其在紫外光照射下对吉非罗齐（GEM）和他莫昔芬（TAM）两种药物污染物的光降解效率。在此方面，深入测定了pH值、催化剂用量和药物浓度的影响。在pH值为5、光催化剂用量为0.2 g/L、药物浓度为5 mg/L以及接触时间为150分钟时，GEM（81%）和TAM（83%）达到了最大光降解水平。药物光降解过程遵循准一级动力学模型。除了光降解作用外，纳米复合材料在抗菌活性方面也被证明是有效的，且与银掺杂水平成正比。Ag-CuFeO@WO纳米复合材料在连续五个循环后表现出稳定、高效的性能，且无明显的催化损失。综上所述，所开发的磁性光催化剂能够同时对废水进行消毒并降解药物污染物，因此在净化多污染物水系统方面显示出有前景的潜力。
