Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal

S. Müller; T. Behrends; C.M. van Genuchten

doi:10.1201/9781351046633-200

Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal

S. Müller, T. Behrends, C.M. van Genuchten

Publikation: Bidrag til bog/rapport/konferenceproceedings › Konferenceartikel i proceedings › peer review

Resumé

Iron-electrocoagulation (Fe-EC), the electrochemical generation of Fe adsorbents in situ, is an effective treatment solution for arsenic (As) contaminated water in decentralized areas. However, extended field trials also revealed problems regarding the efficiency over long-term operation. To investigate how Fe generation is affected by repeated operation of Fe-EC systems, we performed laboratory experiments over a range of electrochemical and solution chemical conditions for 15–35 runs in batch mode. Our results show that Fe generation declines continuously during repeated operation under typical field conditions, resulting in a lower Fe dose than expected based on Faraday’s law. In addition, we find that efficient Fe generation can be maintained in electrolytes free of oxyanions or by applying charge dosage rates ≥15 C L⁻¹ min⁻¹. Based on these results, we discuss potential strategies to maintain the efficiency of Fe-EC field systems under realistic conditions.

Originalsprog	Engelsk
Titel	Environmental Arsenic in a Changing World
Undertitel	Proceedings of the 7th International Congress and Exhibition on Arsenic in the Environment (AS 2018), July 1-6, 2018, Beijing, P.R. China
Redaktører	Yong-Guan Zhu, Huaming Guo, Prosun Bhattacharya, Jochen Bundschuh, Arslan Ahmad, Ravi Naidu
Forlag	Taylor & Francis Group
Sider	506-507
Antal sider	2
ISBN (Trykt)	978-113848609-6
DOI	https://doi.org/10.1201/9781351046633-200
Status	Udgivet - 2018
Udgivet eksternt	Ja
Begivenhed	7th International Congress and Exhibition Arsenic in the Environment, 2018 - Beijing, Kina Varighed: 1 jul. 2018 → 6 jul. 2018 Konferencens nummer: 7

Konference

Konference	7th International Congress and Exhibition Arsenic in the Environment, 2018
Forkortet titel	AS 2018
Land/Område	Kina
By	Beijing
Periode	1/07/18 → 6/07/18

Programområde

Programområde 2: Vandressourcer

Adgang til dokumentet

10.1201/9781351046633-200Licens: CC BY-NC-ND

Citationsformater

Müller, S., Behrends, T., & van Genuchten, C. M. (2018). Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal. I Y.-G. Zhu, H. Guo, P. Bhattacharya, J. Bundschuh, A. Ahmad, & R. Naidu (red.), Environmental Arsenic in a Changing World: Proceedings of the 7th International Congress and Exhibition on Arsenic in the Environment (AS 2018), July 1-6, 2018, Beijing, P.R. China (s. 506-507). Taylor & Francis Group. https://doi.org/10.1201/9781351046633-200

Müller, S. ; Behrends, T. ; van Genuchten, C.M. / Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal. Environmental Arsenic in a Changing World: Proceedings of the 7th International Congress and Exhibition on Arsenic in the Environment (AS 2018), July 1-6, 2018, Beijing, P.R. China. red. / Yong-Guan Zhu ; Huaming Guo ; Prosun Bhattacharya ; Jochen Bundschuh ; Arslan Ahmad ; Ravi Naidu. Taylor & Francis Group, 2018. s. 506-507

@inproceedings{c4451c0ce6d147a69ef0089e40351de6,

title = "Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal",

abstract = "Iron-electrocoagulation (Fe-EC), the electrochemical generation of Fe adsorbents in situ, is an effective treatment solution for arsenic (As) contaminated water in decentralized areas. However, extended field trials also revealed problems regarding the efficiency over long-term operation. To investigate how Fe generation is affected by repeated operation of Fe-EC systems, we performed laboratory experiments over a range of electrochemical and solution chemical conditions for 15–35 runs in batch mode. Our results show that Fe generation declines continuously during repeated operation under typical field conditions, resulting in a lower Fe dose than expected based on Faraday{\textquoteright}s law. In addition, we find that efficient Fe generation can be maintained in electrolytes free of oxyanions or by applying charge dosage rates ≥15 C L−1 min−1. Based on these results, we discuss potential strategies to maintain the efficiency of Fe-EC field systems under realistic conditions.",

author = "S. M{\"u}ller and T. Behrends and {van Genuchten}, C.M.",

note = "Funding Information: CMvG acknowledges funding support by a NWO Veni grant (Project No. 14400). Funding Information: This work was financially supported by National Council for Science and Technology (CONACYT), within the Program Attention to National Problems. Publisher Copyright: {\textcopyright} 2018, CRC Press/Balkema. All rights reserved.; 7th International Congress and Exhibition Arsenic in the Environment, 2018, AS 2018 ; Conference date: 01-07-2018 Through 06-07-2018",

year = "2018",

doi = "10.1201/9781351046633-200",

language = "English",

isbn = "978-113848609-6",

pages = "506--507",

editor = "Yong-Guan Zhu and Huaming Guo and Prosun Bhattacharya and Jochen Bundschuh and Arslan Ahmad and Ravi Naidu",

booktitle = "Environmental Arsenic in a Changing World",

publisher = "Taylor & Francis Group",

address = "United Kingdom",

}

Müller, S, Behrends, T & van Genuchten, CM 2018, Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal. i Y-G Zhu, H Guo, P Bhattacharya, J Bundschuh, A Ahmad & R Naidu (red), Environmental Arsenic in a Changing World: Proceedings of the 7th International Congress and Exhibition on Arsenic in the Environment (AS 2018), July 1-6, 2018, Beijing, P.R. China. Taylor & Francis Group, s. 506-507, 7th International Congress and Exhibition Arsenic in the Environment, 2018, Beijing, Kina, 1/07/18. https://doi.org/10.1201/9781351046633-200

Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal. / Müller, S.; Behrends, T.; van Genuchten, C.M.
Environmental Arsenic in a Changing World: Proceedings of the 7th International Congress and Exhibition on Arsenic in the Environment (AS 2018), July 1-6, 2018, Beijing, P.R. China. red. / Yong-Guan Zhu; Huaming Guo; Prosun Bhattacharya; Jochen Bundschuh; Arslan Ahmad; Ravi Naidu. Taylor & Francis Group, 2018. s. 506-507.

Publikation: Bidrag til bog/rapport/konferenceproceedings › Konferenceartikel i proceedings › peer review

TY - GEN

T1 - Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal

AU - Müller, S.

AU - Behrends, T.

AU - van Genuchten, C.M.

N1 - Conference code: 7

PY - 2018

Y1 - 2018

N2 - Iron-electrocoagulation (Fe-EC), the electrochemical generation of Fe adsorbents in situ, is an effective treatment solution for arsenic (As) contaminated water in decentralized areas. However, extended field trials also revealed problems regarding the efficiency over long-term operation. To investigate how Fe generation is affected by repeated operation of Fe-EC systems, we performed laboratory experiments over a range of electrochemical and solution chemical conditions for 15–35 runs in batch mode. Our results show that Fe generation declines continuously during repeated operation under typical field conditions, resulting in a lower Fe dose than expected based on Faraday’s law. In addition, we find that efficient Fe generation can be maintained in electrolytes free of oxyanions or by applying charge dosage rates ≥15 C L−1 min−1. Based on these results, we discuss potential strategies to maintain the efficiency of Fe-EC field systems under realistic conditions.

AB - Iron-electrocoagulation (Fe-EC), the electrochemical generation of Fe adsorbents in situ, is an effective treatment solution for arsenic (As) contaminated water in decentralized areas. However, extended field trials also revealed problems regarding the efficiency over long-term operation. To investigate how Fe generation is affected by repeated operation of Fe-EC systems, we performed laboratory experiments over a range of electrochemical and solution chemical conditions for 15–35 runs in batch mode. Our results show that Fe generation declines continuously during repeated operation under typical field conditions, resulting in a lower Fe dose than expected based on Faraday’s law. In addition, we find that efficient Fe generation can be maintained in electrolytes free of oxyanions or by applying charge dosage rates ≥15 C L−1 min−1. Based on these results, we discuss potential strategies to maintain the efficiency of Fe-EC field systems under realistic conditions.

UR - http://www.scopus.com/inward/record.url?scp=85079224175&partnerID=8YFLogxK

U2 - 10.1201/9781351046633-200

DO - 10.1201/9781351046633-200

M3 - Conference article in proceedings

AN - SCOPUS:85079224175

SN - 978-113848609-6

SP - 506

EP - 507

BT - Environmental Arsenic in a Changing World

A2 - Zhu, Yong-Guan

A2 - Guo, Huaming

A2 - Bhattacharya, Prosun

A2 - Bundschuh, Jochen

A2 - Ahmad, Arslan

A2 - Naidu, Ravi

PB - Taylor & Francis Group

T2 - 7th International Congress and Exhibition Arsenic in the Environment, 2018

Y2 - 1 July 2018 through 6 July 2018

ER -

Müller S, Behrends T, van Genuchten CM. Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal. I Zhu YG, Guo H, Bhattacharya P, Bundschuh J, Ahmad A, Naidu R, red., Environmental Arsenic in a Changing World: Proceedings of the 7th International Congress and Exhibition on Arsenic in the Environment (AS 2018), July 1-6, 2018, Beijing, P.R. China. Taylor & Francis Group. 2018. s. 506-507 doi: 10.1201/9781351046633-200

Efficient generation of aqueous Fe in electrocoagulation systems for low-cost arsenic removal

Resumé

Konference

Programområde

Adgang til dokumentet

Fingeraftryk

Citationsformater