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Biosynthetic FeS/BC hybrid particles enhanced the electroactive bacteria enrichment in microbial electrochemical systems.
Li, Zeng; Zhang, Peng; Qiu, Ye; Zhang, Zhaohan; Wang, Xin; Yu, Yanling; Feng, Yujie.
Afiliação
  • Li Z; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin 150090, PR China.
  • Zhang P; Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650500, Yunnan, PR China.
  • Qiu Y; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin 150090, PR China.
  • Zhang Z; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin 150090, PR China.
  • Wang X; College of Environmental Science & Engineering, Nankai University, Tianjin, 300071, PR China.
  • Yu Y; School of Chemistry & Chemical Engineering, Harbin Institute of Technology, Harbin 150001, PR China.
  • Feng Y; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin 150090, PR China. Electronic address: yujief@hit.edu.cn.
Sci Total Environ ; : 143142, 2020 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-33168253
ABSTRACT
Modifying the surface of an anode can improve electroactive bacteria (EAB) enrichment, thereby enhancing the performance of the associated microbial electrochemical systems (MESs). In this study, biosynthetic FeS nanoparticles were used to modify the anode in MESs. The experimental results demonstrated that the stable maximum voltage of the FeS composited biochar (FeS/BC)-modified anode reached 0.72 V, which is 20% higher than that of the control. The maximum power density with the FeS/BC anode was 793 mW/m2, which is 46.31% higher than that obtained with the control (542 mW/m2). According to cyclic voltammetry (CV) analysis, FeS/BC facilitates the direct electron transfer between bacteria and the electrode. The biomass protein concentration of the FeS/BC anode was 841.75 µg/cm2, which is almost 1.5 times higher than that of the carbon cloth anode (344.25 µg/cm2); hence, FeS/BC modification can promote biofilm formation. The composition of Geobacter species on the FeS/BC anode (75.16%) was much higher than that on the carbon cloth anode (4.81%). All the results demonstrated that the use of the biosynthetic FeS/BC anode is an environmentally friendly and efficient strategy for enhancing the electroactive biofilm formation and EAB enrichment in MESs.
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Sci Total Environ Ano de publicação: 2020 Tipo de documento: Artigo

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Sci Total Environ Ano de publicação: 2020 Tipo de documento: Artigo