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A tartrate-EDTA-Fe complex mediates electron transfer and enhances ammonia recovery in a bioelectrochemical-stripping system
Zhang, De-Xin; Zhai, Si-Yuan; Zeng, Ran; Liu, Cheng-Yan; Zhang, Bo; Yu, Zhe; Yang, Li-Hui; Li, Xi-Qi; Hou, Ya-Nan; Wang, Ai-Jie; Cheng, Hao-Yi
2022-07
Source PublicationENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
ISSN2666-4984
Volume11Issue:0Pages:100186
AbstractTraditional bioelectrochemical systems (BESs) coupled with stripping units for ammonia recovery suffer from an insufficient supply of electron acceptors due to the low solubility of oxygen. In this study, we proposed a novel strategy to efficiently transport the oxidizing equivalent provided at the stripping unit to the cathode by introducing a highly soluble electron mediator (EM) into the catholyte. To validate this strategy, we developed a new kind of iron complex system (tartrate-EDTA-Fe) as the EM. EDTA-Fe contributed to the redox property with a midpoint potential of -0.075 V (vs. standard hydrogen electrode, SHE) at pH 10, whereas tartrate acted as a stabilizer to avoid iron precipitation under alkaline conditions. At a ratio of the catholyte recirculation rate to the anolyte flow rate (RC-A) of 12, the NH4 thorn -N recovery rate in the system with 50 mM tartrate-EDTA-Fe complex reached 6.9 +/- 0.2 g N mz d 1, approximately 3.8 times higher than that in the non-EM control. With the help of the complex, our system showed an NH4 thorn -N recovery performance comparable to that previously reported but with an extremely low RC-A (0.5 vs. 288). The strategy proposed here may guide the future of ammonia recovery BES scale-up because the introduction of an EM allows aeration to be performed only at the stripping unit instead of at every cathode, which is beneficial for the system design due to its simplicity and reliability. (c) 2022 The Authors. Published by Elsevier B.V. on behalf of Chinese Society for Environmental Sciences, Harbin Institute of Technology, Chinese Research Academy of Environmental Sciences. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Department中国科学院环境生物技术重点实验室 ; 中国科学院环境生物技术重点实验室
KeywordMICROBIAL FUEL-CELLS PIG SLURRY REMOVAL NITRATE ACID
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47766
Collection中国科学院环境生物技术重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Nanjing Tech Univ, Coll Civil Engn, Nanjing 211816, Peoples R China
4.Harbin Inst Technol Shenzhen, Sch Civil & Environm Engn, State Key Lab Urban Water Resource & Environm, Shenzhen 518055, Peoples R China
5.Tianjin Chengjian Univ, Sch Environm & Municipal Engn, Tianjin Key Lab Aquat Sci & Technol, Tia
Recommended Citation
GB/T 7714
Zhang, De-Xin,Zhai, Si-Yuan,Zeng, Ran,et al. A tartrate-EDTA-Fe complex mediates electron transfer and enhances ammonia recovery in a bioelectrochemical-stripping system[J]. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY,2022,11(0):100186.
APA Zhang, De-Xin.,Zhai, Si-Yuan.,Zeng, Ran.,Liu, Cheng-Yan.,Zhang, Bo.,...&Cheng, Hao-Yi.(2022).A tartrate-EDTA-Fe complex mediates electron transfer and enhances ammonia recovery in a bioelectrochemical-stripping system.ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY,11(0),100186.
MLA Zhang, De-Xin,et al."A tartrate-EDTA-Fe complex mediates electron transfer and enhances ammonia recovery in a bioelectrochemical-stripping system".ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 11.0(2022):100186.
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