Removal of sulfamethoxazole in water by electro-enhanced Co2+/peroxydisulfate system with activated carbon fiber-cathode

Shuan Liu; Shabi Ui Hassan; Haojie Ding; Shiyao Li; Fan Jin; Zhiquan Miao; Xuxu Wang; Hong Li; Chun Zhao

doi:10.1016/j.chemosphere.2019.125644

Removal of sulfamethoxazole in water by electro-enhanced Co²⁺/peroxydisulfate system with activated carbon fiber-cathode

Chemosphere. 2020 Apr:245:125644. doi: 10.1016/j.chemosphere.2019.125644. Epub 2019 Dec 14.

Authors

Shuan Liu¹, Shabi Ui Hassan², Haojie Ding², Shiyao Li³, Fan Jin², Zhiquan Miao², Xuxu Wang², Hong Li⁴, Chun Zhao⁵

Affiliations

¹ State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China; School of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi, 832003, PR China.
² State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China.
³ State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China; School of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi, 832003, PR China; Huayue Institute of Ecological Environment Engineering, Chongqing, 401120, PR China.
⁴ Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China. Electronic address: lihong666@cqu.edu.cn.
⁵ State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China; School of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi, 832003, PR China. Electronic address: pureson@163.com.

PMID: 31864051
DOI: 10.1016/j.chemosphere.2019.125644

Abstract

The ACF-cathode/Co²⁺/PDS system was validated to effectively remove sulfamethoxazole (SMX), a typical carcinogenic and refractory antibiotic from the aqueous environment. The experimental conditions such as initial pH, PDS, Co²⁺ concentrations, and current density were optimized. Moreover, the system exhibited excellent ability for SMX degradation in surface water and tap water. It was proved that ACF-cathode/Co²⁺/PDS consumes much less electrical energy per order (E_EO) values than Pt-cathode/Co²⁺/PDS processes. More importantly, due to the cathodic protection, the removal rate of SMX within 30 min was satisfactory even after ACF used for 10 cycles continuously. In addition, the cobalt residue in the ACF-cathode/Co²⁺/PDS process was much lower than that of Pt-cathode/Co²⁺/PDS system due to the deposition of cobalt on ACF surface. The catalytic system not only had high catalytic performance, but also had less cobalt residue in the solution and lower power consumption. Therefore, the study provided a novel technology for the removal of refractory pollutants in water.

Keywords: Activated carbon fiber; Cobalt; Electrochemical; Peroxydisulfate; Sulfamethoxazole.

MeSH terms

Carbon Fiber / chemistry
Charcoal / chemistry
Cobalt / chemistry
Dietary Fiber
Electrodes
Oxidation-Reduction
Sulfamethoxazole / chemistry*
Water
Water Pollutants, Chemical / analysis
Water Pollutants, Chemical / chemistry*
Water Purification / methods*

Substances

Carbon Fiber
Dietary Fiber
Water Pollutants, Chemical
Water
Charcoal
Cobalt
Sulfamethoxazole