Exploration of the degradation mechanism of ciprofloxacin in water by nano zero-valent iron combined with activated carbon and nickel

doi:10.1016/j.molliq.2021.118212

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	Exploration of the degradation mechanism of ciprofloxacin in water by nano zero-valent iron combined with activated carbon and nickel
	Chen, Yong; Zhang, Jiawei; Xu, Hui
刊名	Journal of Molecular Liquids
	2022
卷号	345
关键词	Activated carbon Degradation Iron Liquid chromatography Mass spectrometry Nickel Nickel compounds Oxidation resistance Reaction kinetics Activated carbon supported Activated carbon-supported nano zero-valent iron/nickel bimetal composite Bimetal composites Ciprofloxacin removal Degradation mechanism Iron-nickel Nano zero-valent irons Removal efficiencies Transition metal elements ]+ catalyst
ISSN号	0167-7322
DOI	10.1016/j.molliq.2021.118212
英文摘要	The addition of second transition metal element has been proven to be one of the most efficient methods to enhance removal efficiency of nano zero-valent iron (nZVI). Here, activated carbon-supported nano zero-valent iron/nickel bimetal composite (AC-nZVI/Ni) as efficient adsorbents to remove ciprofloxacin (CIP) in water is reported. The dispersity of nZVI is dramatically improved by AC. Mass ratio of iron to nickel (50:1) endows AC-nZVI/Ni excellent removal efficiency (98.5% at 120 min), which can be achieved in a wide range of pH. The investigations on degradation kinetics show kinetic behavior is affected by Ni element because the reaction order is changed from pseudo-first-order (AC-nZVI) to pseudo-second-order (AC-nZVI/Ni). At the same time the apparent active energy (Ea) is decreased from 61.06 to 47.11 kJ/mol, which is beneficial for rapid removal of CIP. With the help of AC, the oxidation resistance of AC-nZVI/Ni is the highest one among experimental samples in 100 days, suggesting a good long-term stability. Eventually, three possible degradation paths and ten degradation products of CIP are proposed depending on the analysis of Liquid chromatography-mass spectrometry (LC-MS). These findings may provide a new perspective on evaluating the roles of second metal and supported material to enhance the removal efficiency of nZVI, which is helpful to tailor and create high-efficiency adsorbent material based on nZVI for wastewater fields. © 2021 Elsevier B.V.
语种	英语
出版者	Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158038]
专题	石油化工学院
作者单位	College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Chen, Yong,Zhang, Jiawei,Xu, Hui. Exploration of the degradation mechanism of ciprofloxacin in water by nano zero-valent iron combined with activated carbon and nickel[J]. Journal of Molecular Liquids,2022,345.
APA	Chen, Yong,Zhang, Jiawei,&Xu, Hui.(2022).Exploration of the degradation mechanism of ciprofloxacin in water by nano zero-valent iron combined with activated carbon and nickel.Journal of Molecular Liquids,345.
MLA	Chen, Yong,et al."Exploration of the degradation mechanism of ciprofloxacin in water by nano zero-valent iron combined with activated carbon and nickel".Journal of Molecular Liquids 345(2022).