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Modified Activated Carbon Fiber Felt for the Electrosorption of Norfloxacin in Aqueous Solution

by Xianzhen Li 1, Yue Hu 1, Diao She 2,3,* and Wei-Bo Shen 2,3,*
1
College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
2
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
3
Institute of Soil and Water Conservation, CAS&MWR, Yangling 712100, China
*
Authors to whom correspondence should be addressed.
Sustainability 2020, 12(10), 3986; https://doi.org/10.3390/su12103986
Received: 22 April 2020 / Revised: 11 May 2020 / Accepted: 11 May 2020 / Published: 13 May 2020
(This article belongs to the Section Resources and Sustainable Utilization)
As an antibiotic, Norfloxacin (NOR) is widely found in the water environment and presents considerable harm to human beings. At present, the preparation of removal materials is complicated, and the removal efficiency is not high. The adsorption effect of modified activated carbon fiber felt (MACFF) electrosorption and its influencing factors on NOR were studied. Activated carbon fiber felt (ACFF) was modified with 20% nitric acid, and the ACFFs were characterized by SEM, TEM, and FTIR both before and after modification. The optimal working conditions for electrosorption with an MACFF electrode were as follows: the voltage was 1.0 V, the pH was 6, and the plate spacing was 10 mm. The maximum adsorption capacity of the MACFF for NOR was 128.55 mg/g. Model fitting showed that pseudo-second-order kinetic model and Langmuir model were more suitable for explaining this adsorption process. In addition, this study found that, with 20% nitric acid as the regeneration liquid and under the reverse charging method, the regeneration rate of the MACFF electrode was maintained at approximately 96% and the regeneration was good, therefore, this technology can not only save operation costs but also has good development prospects in sewage treatment. View Full-Text
Keywords: nitric acid modification 1; activated carbon fiber felt 2; electrosorption 3; norfloxacin 4 nitric acid modification 1; activated carbon fiber felt 2; electrosorption 3; norfloxacin 4
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Li, X.; Hu, Y.; She, D.; Shen, W.-B. Modified Activated Carbon Fiber Felt for the Electrosorption of Norfloxacin in Aqueous Solution. Sustainability 2020, 12, 3986.

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