Combined electrocoagulation and electroflotation for removal of fluoride from drinking water

Qianhai Zuo; Xueming Chen; Wei Li; Guohua Chen

doi:10.1016/j.jhazmat.2008.02.039

Combined electrocoagulation and electroflotation for removal of fluoride from drinking water

Qianhai Zuo, Xueming Chen, Wei Li, Guohua Chen

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

136 Citations (Scopus)

Abstract

A combined electrocoagulation (EC) and electroflotation (EF) process was proposed to remove fluoride from drinking water. Its efficacy was investigated under different conditions. Experimental results showed that the combined process could remove fluoride effectively. The total hydraulic retention time required was only 30 min. After treatment, the fluoride concentration was reduced from initial 4.0-6.0 mg/L to lower than 1.0 mg/L. The influent pH value was found to be a very important variable that affected fluoride removal significantly. The optimal influent pH range is 6.0-7.0 at which not only can effective defluoridation be achieved, but also no pH readjustment is needed after treatment. In addition, it was found that SO₄^2- had negative effect; Ca²⁺ had positive effect; while Cl^- had little effect on the fluoride removal. The EC charge loading, EF charge loading and energy consumption were 3.0 Faradays/m³, 1.5 Faradays/m³, and 1.2 kWh/m³, respectively, under typical conditions where fluoride was reduced from initial 4.0 to 0.87 mg/L. © 2008 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	452-457
Journal	Journal of Hazardous Materials
Volume	159
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jhazmat.2008.02.039
Publication status	Published - 30 Nov 2008
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Defluoridation
Drinking water
Electrocoagulation
Electroflotation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Combined electrocoagulation and electroflotation for removal of fluoride from drinking water",

abstract = "A combined electrocoagulation (EC) and electroflotation (EF) process was proposed to remove fluoride from drinking water. Its efficacy was investigated under different conditions. Experimental results showed that the combined process could remove fluoride effectively. The total hydraulic retention time required was only 30 min. After treatment, the fluoride concentration was reduced from initial 4.0-6.0 mg/L to lower than 1.0 mg/L. The influent pH value was found to be a very important variable that affected fluoride removal significantly. The optimal influent pH range is 6.0-7.0 at which not only can effective defluoridation be achieved, but also no pH readjustment is needed after treatment. In addition, it was found that SO42- had negative effect; Ca2+ had positive effect; while Cl- had little effect on the fluoride removal. The EC charge loading, EF charge loading and energy consumption were 3.0 Faradays/m3, 1.5 Faradays/m3, and 1.2 kWh/m3, respectively, under typical conditions where fluoride was reduced from initial 4.0 to 0.87 mg/L. {\textcopyright} 2008 Elsevier B.V. All rights reserved.",

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TY - JOUR

T1 - Combined electrocoagulation and electroflotation for removal of fluoride from drinking water

AU - Zuo, Qianhai

AU - Chen, Xueming

AU - Li, Wei

AU - Chen, Guohua

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2008/11/30

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N2 - A combined electrocoagulation (EC) and electroflotation (EF) process was proposed to remove fluoride from drinking water. Its efficacy was investigated under different conditions. Experimental results showed that the combined process could remove fluoride effectively. The total hydraulic retention time required was only 30 min. After treatment, the fluoride concentration was reduced from initial 4.0-6.0 mg/L to lower than 1.0 mg/L. The influent pH value was found to be a very important variable that affected fluoride removal significantly. The optimal influent pH range is 6.0-7.0 at which not only can effective defluoridation be achieved, but also no pH readjustment is needed after treatment. In addition, it was found that SO42- had negative effect; Ca2+ had positive effect; while Cl- had little effect on the fluoride removal. The EC charge loading, EF charge loading and energy consumption were 3.0 Faradays/m3, 1.5 Faradays/m3, and 1.2 kWh/m3, respectively, under typical conditions where fluoride was reduced from initial 4.0 to 0.87 mg/L. © 2008 Elsevier B.V. All rights reserved.

AB - A combined electrocoagulation (EC) and electroflotation (EF) process was proposed to remove fluoride from drinking water. Its efficacy was investigated under different conditions. Experimental results showed that the combined process could remove fluoride effectively. The total hydraulic retention time required was only 30 min. After treatment, the fluoride concentration was reduced from initial 4.0-6.0 mg/L to lower than 1.0 mg/L. The influent pH value was found to be a very important variable that affected fluoride removal significantly. The optimal influent pH range is 6.0-7.0 at which not only can effective defluoridation be achieved, but also no pH readjustment is needed after treatment. In addition, it was found that SO42- had negative effect; Ca2+ had positive effect; while Cl- had little effect on the fluoride removal. The EC charge loading, EF charge loading and energy consumption were 3.0 Faradays/m3, 1.5 Faradays/m3, and 1.2 kWh/m3, respectively, under typical conditions where fluoride was reduced from initial 4.0 to 0.87 mg/L. © 2008 Elsevier B.V. All rights reserved.

KW - Defluoridation

KW - Drinking water

KW - Electrocoagulation

KW - Electroflotation

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DO - 10.1016/j.jhazmat.2008.02.039

M3 - RGC 21 - Publication in refereed journal

C2 - 18359559

SN - 0304-3894

VL - 159

SP - 452

EP - 457

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

IS - 2-3

ER -

Combined electrocoagulation and electroflotation for removal of fluoride from drinking water

Abstract

Bibliographical note

Research Keywords

UN SDGs

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