Combined electrocoagulation and electroflotation for removal of fluoride from drinking water

Zuo, Qianhai; Chen, Xueming; Li, Wei; Chen, Guohua

doi:10.1016/j.jhazmat.2008.02.039

Cited by 125 publications

(61 citation statements)

References 26 publications

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“…Effective removal of pollutants by flotation and sedimentation is augmented by metal based coagulants having a similar effect as the metal cations produced by anode. The key reactions are as follows (Zuo et al, 2008):…”

Section: Electrocoagulation (Ec) and Electrocoagulation/flotation (Ef)mentioning

confidence: 99%

Arsenic and fluoride contaminated groundwaters: A review of current technologies for contaminants removal

Jadhav

Bringas

Yadav

et al. 2015

Journal of Environmental Management

464

146

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Section: Electrocoagulation (Ec) and Electrocoagulation/flotation (Ef)mentioning

confidence: 99%

Arsenic and fluoride contaminated groundwaters: A review of current technologies for contaminants removal

Jadhav

Bringas

Yadav

et al. 2015

Journal of Environmental Management

464

146

View full text Add to dashboard Cite

“…Al 3+ produced by anodic dissolution undergoes hydrolysis to produce simple compounds Al(OH) 2+ (Mouedhen et al 2008;Chen 2004;Fouad et al 2009;Zuo et al 2008;Gao et al 2005).…”

Section: Resultsmentioning

confidence: 99%

“…Previous studies have used a traditional vertical parallel plate cells or horizontal cells with mesh or array of horizontal cylindrical anodes (Chen et al 2000;Chen 2004;Fouad et al 2009;Emamjomeh et al 2009;Zuo et al 2008;Gao et al 2005;Mostefa and Tir 2004;Carmona et al 2006;Dimoglo et al 2004), such simple electrodes suffer from low surface area and low active mass of anode per unit volume of the cell.…”

Section: Introductionmentioning

confidence: 99%

Separation of Oil from Oil–Water Emulsions by Electrocoagulation in an Electrochemical Reactor with a Fixed-Bed Anode

Hassan

Nirdosh

Sedahmed

2015

Water Air Soil Pollut

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In separation of oil from oil-water emulsion by electrocoagulation in an electrolytic cell with a fixedbed anode which is made of randomly packed aluminum cylinders in a perforated plastic basket, the cathode was a horizontal aluminum plate placed below the bed anode at the cell bottom. The effects of different variables such as current density, bed height, cylinder diameter, NaCl concentration on the rate of oil removal, and electrical energy consumption were studied. Under optimum conditions, the separation efficiency reached 85 % after 5 min and a maximum of 99 % after 35 min. The rate of oil removal and oil separation efficiency increased with increasing the current density and NaCl concentration. Increasing bed height was found to increase the rate of oil removal and separation efficiency. It was also found that there was an optimum (cylinder diameter) at which the rate of oil removal and separation efficiency were higher than those at other diameters. Electrical energy consumption, which ranged from 0.35 to 27.5 kW h/kg of oil removed, was found to increase with increasing the current density, bed height and decreasing NaCl concentration. Energy consumption was found to decrease at optimum cylinder diameter. For 99 % oil removal, Al consumption under the present range of conditions ranged from 0.017 to 0.34 g/ L of emulsion and the amount of sludge ranged from 0.55 to 1.48 g/L depending on the operating conditions. Comparison of the performance of the present cell with traditional cells shows that the present cell is superior to traditional cells such as the vertical parallel plate cell.

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“…Besides, fluoride containing water may also contain different types of co-existing ions that affect the defluoridation efficiency [24][25][26]. In this view, the effect and concentration of co-existing ions such as Cl À , NO 3 À , SO 4 2À , PO 4 3À , Ca 2+ and Mg 2+ on defluoridation by EC process using Al electrodes has also been investigated [27][28][29][30]. Normally, the use of Al based sludges for fluoride removal process has shown adverse effect to human health.…”

Section: Introductionmentioning

confidence: 99%

Comparison and understanding of fluoride removal mechanism in Ca2+, Mg2+ and Al3+ ion assisted electrocoagulation process using Fe and Al electrodes

Govindan

Raja

Maheshwari

et al. 2015

Journal of Environmental Chemical Engineering

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Combined electrocoagulation and electroflotation for removal of fluoride from drinking water

Cited by 125 publications

References 26 publications

Arsenic and fluoride contaminated groundwaters: A review of current technologies for contaminants removal

Arsenic and fluoride contaminated groundwaters: A review of current technologies for contaminants removal

Separation of Oil from Oil–Water Emulsions by Electrocoagulation in an Electrochemical Reactor with a Fixed-Bed Anode

Comparison and understanding of fluoride removal mechanism in Ca2+, Mg2+ and Al3+ ion assisted electrocoagulation process using Fe and Al electrodes

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