Sorption of Sulfadiazine, Norfloxacin, Metronidazole, and Tetracycline by Granular Activated Carbon: Kinetics, Mechanisms, and Isotherms
Sorption of Sulfadiazine, Norfloxacin, Metronidazole, and Tetracycline by Granular Activated Carbon: Kinetics, Mechanisms, and Isotherms
复制标题
DOI：
10.1007/s11270-017-3320-x
复制
发表时间：
2017-04-01
影响因子：
2.9
通讯作者：
He, Chi
中科院分区：
文献类型：
--
作者：
Liu, Pingping;Wang, Qiaorui;He, Chi
活性炭由于其发达的孔结构、高的超滤活性以及优异的机械和化学稳定性，近年来在含磷废水处理中得到了广泛的应用。本文首次研究了以玉米秸秆为原料制备的颗粒活性炭（GAC）对磺胺嘧啶（SDZ）、诺氟沙星（NOR）、甲硝唑（MDE）和四环素（TC）等4种典型抗生素的吸附性能。动力学，机制，和等温线模型相关的吸附过程。结果表明，活性炭对三种重金属离子的吸附能力顺序为SDZ > NOR > MDE > TC.吸附动力学符合准二级动力学模型。无论是韦伯-莫里斯颗粒内扩散和博伊德动力学模型传达的信息，膜扩散是占主导地位的吸附过程。吸附等温线更好地符合朗缪尔模型。本研究为活性炭去除城市和工业废水中的抗生素奠定了基础。
Activated carbon has widespread application in antibiotic-loaded wastewater treatment in recent years, owing to its developed pore structure, high superficies reactivity, and excellent mechanical and chemical stability. In this work, sorption experiments of four representative antibiotics, including sulfadiazine (SDZ), norfloxacin (NOR), metronidazole (MDE), and tetracycline (TC), over granular activated carbon (GAC), which was made from maize straw, were firstly studied. Kinetics, mechanism, and isotherm models related to the sorption process were employed. Results revealed that the sorption capacity by GAC followed the order SDZ > NOR > MDE > TC. The sorption kinetics of the four antibiotics well conformed to the pseudo-second-order model. Both the Weber-Morris intraparticle diffusion and Boyd kinetic models conveyed the information that film diffusion was dominant in the sorption process. The sorption isotherm was better fitted to the Langmuir model. This research may pave a basic way for removing antibiotics in municipal and industrial wastewater by activated carbon.