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Enhanced 1,2-dichloroethane removal using g-C3N4/Blue TiO2 nanotube array photoanode in microbial photoelectrochemical cells.
Li, Shaoyu; Ying, Zanyun; Peng, Ruijian; Zhou, Yu; Zhang, Shihan; Zhao, Jingkai; Song, Shuang; Chen, Jianmeng; Ye, Jiexu.
Afiliación
  • Li S; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
  • Ying Z; Ningbo Key Laboratory of Agricultural Germplasm Resources Mining and Environmental Regulation, College of Science & Technology, Ningbo University, Ningbo, 315212, China.
  • Peng R; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
  • Zhou Y; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
  • Zhang S; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
  • Zhao J; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
  • Song S; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
  • Chen J; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China; School of Environment and Natural Resources, Zhejiang University of Science & Technology, Hangzhou, 310023, China. Electronic address: jchen@zjut.edu.cn.
  • Ye J; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China. Electronic address: yejiexu@zjut.edu.cn.
Chemosphere ; 363: 142839, 2024 Sep.
Article en En | MEDLINE | ID: mdl-39019181
ABSTRACT
The compound 1,2-dichloroethane (1,2-DCA), a persistent and ubiquitous pollutant, is often found in groundwater and can strongly affect the ecological environment. However, the extreme bio-impedance of C-Cl bonds means that a high energy input is needed to drive biological dechlorination. Biotechnology techniques based on microbial photoelectrochemical cell (MPEC) could potentially convert solar energy into electricity and significantly reduce the external energy inputs currently needed to treat 1,2-DCA. However, low electricity-generating efficiency at the anode and sluggish bioreaction kinetics at the cathode limit the application of MPEC. In this study, a g-C3N4/Blue TiO2-NTA photoanode was fabricated and incorporated into an MPEC for 1,2-DCA removal. Optimal performance was achieved when Blue TiO2 nanotube arrays (Blue TiO2-NTA) were loaded with graphitic carbon nitride (g-C3N4) 10 times. The photocurrent density of the g-C3N4/Blue TiO2-NTA composite electrode was 2.48-fold higher than that of the pure Blue TiO2-NTA electrode under light irradiation. Furthermore, the MPEC equipped with g-C3N4/Blue TiO2-NTA improved 1,2-DCA removal efficiency by 45.21% compared to the Blue TiO2-NTA alone, which is comparable to that of a microbial electrolysis cell. In the modified MPEC, the current efficiency reached 69.07% when the light intensity was 150 mW cm-2 and the 1,2-DCA concentration was 4.4 mM. The excellent performance of the novel MPEC was attributed to the efficient direct electron transfer process and the abundant dechlorinators and electroactive bacteria. These results provide a sustainable and cost-effective strategy to improve 1,2-DCA treatment using a biocathode driven by a photoanode.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Titanio / Contaminantes Químicos del Agua / Nanotubos / Electrodos / Dicloruros de Etileno Idioma: En Revista: Chemosphere Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Titanio / Contaminantes Químicos del Agua / Nanotubos / Electrodos / Dicloruros de Etileno Idioma: En Revista: Chemosphere Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido