Efficient reduction of antimony by sulfate-reducer enriched bio-cathode with hydrogen production in a microbial electrolysis cell

Arulmani, S.; Dai, Junxi; Li, Han; Chen, Zhenxin; Zhang, Hongguo; Yan, Jia; Xiao, Tangfu; Sun, Weimin

doi:10.1016/j.scitotenv.2021.145733

Cited by 28 publications

(3 citation statements)

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“…Applying an external voltage to the cathode and anode can provide the driving force for electron transfer and the current was monitored with a multimeter (UNI‐T 803, Unido Smart Test Store, Shanghai, China). Meanwhile, when the reaction system had the maximum current output and reached stability, a mature electrochemical biofilm was formed on the cathode surface 20,21 …”

Section: Methodsmentioning

confidence: 99%

“…Meanwhile, when the reaction system had the maximum current output and reached stability, a mature electrochemical biofilm was formed on the cathode surface. 20,21 The electrolyte medium consisted of phosphate buffered medium. 22 Na 2 HPO 4 (0.0383 mol L −1 ) and NaH 2 PO 4 (0.0621 mol L −1 ) were purchased from Shanghai Bohr Chemical Reagent Co. Ltd. KCl (0.0017 mol L −1 ) and CaCl 2 (0.0014 mol L −1 ) were obtained from ) and H 3 BO 3 (0.00009251 mol L −1 ) were purchased from Tianjin Fuchen Chemical Reagent Factory.…”

Section: Construction Of Bioelectrochemical Reactorsmentioning

confidence: 99%

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Investigating the performance and mechanism of nitrogen gas fixation and conversion to ammonia based on biocathode bioelectrochemistry system

Lin

Guo

et al. 2022

J of Chemical Tech & Biotech

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Background Nowadays, microbial electrochemistry is widely used to produce valuable products (CH4, CH3CH2OH, CH3COOH, etc.) from carbon dioxide. Meanwhile, given that low‐value nitrogen (N2) is abundantly available as a feedstock for chemicals, thus ammonia (NH3) synthesis using bioelectrochemistry is still a promising technology. However, considering N2 stability and ammonium (NH4+) adsorption with a proton exchange membrane, developing suitable microbial systems for NH3 synthesis still faces challenges. Based on this, we developed a single‐chamber biocathode bioelectrochemical system for efficient NH3 production. Results For the reaction system that we constructed, NH4+ production reached 6.31 mg L−1 within 10 days, and NH4+ production was positively correlated with current density. A C2H2 reduction assay further verified the activity of nitrogenase enzyme. Microbial community analysis revealed that Clostridia plays a crucial role in the N2 fixation process, and the synergistic interaction between different microorganisms favors electron transfer and an increase in NH3 production. Conclusions The results of a series of experiments have proved that this green and economical method can be used to efficiently generate NH4+. This reaction system not only utilizes the advantages of obtaining electrons for reduction reaction, but also improves electron transfer and avoids the shortcomings of NH4+ adsorption. Additionally, this in‐depth study of N2 fixation mechanism provides a theoretical reference for other applications of bioelectrochemical systems. © 2022 Society of Chemical Industry (SCI).

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Section: Methodsmentioning

confidence: 99%

Section: Construction Of Bioelectrochemical Reactorsmentioning

confidence: 99%

Investigating the performance and mechanism of nitrogen gas fixation and conversion to ammonia based on biocathode bioelectrochemistry system

Lin

Guo

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…However, traditional water electrolysis suffers from the issues of high capital investment, intensive energy consumption and the low value of anode products. 7,8 Hydrogen production via MEC technology is designed to solve these problems. It reduces the energy consumption of water electrolytic with the assistance of microorganisms, whilst purifying the sewage wastes at the anode.…”

Section: Introductionmentioning

confidence: 99%