Rapid decontamination of tetracycline hydrolysis product using electrochemical CNT filter: Mechanism, impacting factors and pathways

Shengnan Yang; Yanbiao Liu; Chensi Shen; Fang Li; Bo Yang; Manhong Huang; Ming Yang; Zhiwei Wang; Wolfgang Sand

doi:10.1016/j.chemosphere.2019.125525

Rapid decontamination of tetracycline hydrolysis product using electrochemical CNT filter: Mechanism, impacting factors and pathways

Chemosphere. 2020 Apr:244:125525. doi: 10.1016/j.chemosphere.2019.125525. Epub 2019 Nov 30.

Authors

Shengnan Yang¹, Yanbiao Liu², Chensi Shen³, Fang Li³, Bo Yang¹, Manhong Huang³, Ming Yang⁴, Zhiwei Wang⁵, Wolfgang Sand⁶

Affiliations

¹ Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China.
² Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai, 200092, China. Electronic address: yanbiaoliu@dhu.edu.cn.
³ Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai, 200092, China.
⁴ Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Instrumental Analysis Center, Donghua University, Shanghai, 201620, China.
⁵ Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai, 200092, China; State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
⁶ Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China; Institute of Biosciences, Freiberg University of Mining and Technology, Freiberg, 09599, Germany.

PMID: 31812051
DOI: 10.1016/j.chemosphere.2019.125525

Abstract

In this study, electrooxidation of the tetracycline hydrolysis products was investigated using a carbon nanotube (CNT) electrochemical filter and 4-epianhydrochlortetracycline (EACTC) as a model compound. Electrochemical filtration of 10 μmol L^-1 EACTC at a voltage of 2.5 V and a flow rate of 1.5 mL min^-1 (hydraulic residence time <3 s) provided an oxidation flux of 1251 ± 28 μmol h^-1 m^-2. Replacement of the Ti cathode with a CNT filter cathode increased the EACTC oxidative flux by 1.3 fold at a voltage of 2.5 V. The electrochemical filtration process is effective for the degradation of EACTC and the reduction of the antimicrobial activity based on liquid chromatography time-of-flight mass spectrometry (LC-TOF-MS) analysis and luminescent bacteria test. The high oxidation flux within 300 min (1212-1263 μmol h^-1 m^-2) and affordable cost (0.25 kWh m^-3) at a voltage of 2.5 V show the potential application of the electrochemical filtration system as a promising unit for EACTC degradation. These findings provided new insights into the rational design principles of novel continuous-flow filtration system aimed to efficiently remove hydrolysis products of the antibiotic tetracycline.

Keywords: CNT filter; Continuous-flow; Degradation pathway; Electrooxidation; Tetracycline hydrolysis product.

MeSH terms

Anti-Bacterial Agents
Decontamination
Electrodes
Filtration / methods
Hydrolysis
Models, Chemical*
Nanotubes, Carbon / chemistry*
Oxidation-Reduction
Tetracycline / chemistry*
Titanium / chemistry
Water Pollutants, Chemical / analysis
Water Pollutants, Chemical / chemistry*

Substances

Anti-Bacterial Agents
Nanotubes, Carbon
Water Pollutants, Chemical
Titanium
Tetracycline