Cost-effective electrocoagulation process for the remediation of fluoride from pretreated photovoltaic wastewater

Palahouane, B.; Drouiche, Nadjib; Aoudj, S.; Bensadok, K.

doi:10.1016/j.jiec.2014.06.033

Cited by 102 publications

(24 citation statements)

References 17 publications

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“…(2016) [1][2][3][4][5][6][7][8][9] www.deswater.com doi: 10.1080/19443994.2016.1184189 Al ! Al 3þ þ 3e À…”

Section: Desalination and Water Treatmentunclassified

“…Electrocoagulation (EC) has been tested on several waters such as alcohol distillery wastewaters [3], synthetic natural waters [4], pasta and cookie processing wastewaters [5], polluted rivers [6], laundry wastewaters [7], fluoride [8][9][10][11][12][13], pesticide [14], Boron [15], azo dye [16], and chromium [17]. EC electrodes are made from aluminum, iron, or a combination of these.…”

Section: Introductionmentioning

confidence: 99%

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Wastewater disinfection by electrocoagulation process and its interaction with abiotic parameters

Boudjema

Drouiche

Kherat

et al. 2016

Desalination and Water Treatment

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In this study, we evaluated the influence of abiotic factors and their interaction on the bactericidal effects of electrocoagulation. We followed the kinetics of bacterial density vs. time and some abiotic parameters such as pH, conductivity, turbidity, TSS, and COD, by setting the intensity of the current to 3 A using aluminum electrodes. To determine the effectiveness of the treatment, the behavior of bacteria towards the electric current was investigated by calculating the mortality rate (log 10) or bacterial survival (UFC mL −1 ) after treatment. The results show that the removal rate of the bacteria is 6 log 10 with a significant correlation (R 2 = 0.98) by increasing the time. A strong correlation was observed with the pH increase which is R 2 = 0.93. A positive correlation has been demonstrated with the elimination of bacterial biomass and COD and negative with TSS.

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“…(2016) [1][2][3][4][5][6][7][8][9] www.deswater.com doi: 10.1080/19443994.2016.1184189 Al ! Al 3þ þ 3e À…”

Section: Desalination and Water Treatmentunclassified

Section: Introductionmentioning

confidence: 99%

Wastewater disinfection by electrocoagulation process and its interaction with abiotic parameters

Boudjema

Drouiche

Kherat

et al. 2016

Desalination and Water Treatment

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“…High fluorine-containing wastewater is widely produced in the fluorine chemical, aluminium electrolysis, steel, and photovoltaic industries all over the world (Jiang et al 2013;Groth III 1975;Palahouane et al 2015). Excess fluorine in wastewater has serious detrimental effects for propagation and human beings (Brindha et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Recovery of cryolite with high molar ratio from high fluorine-containing wastewater

Jiang

Zhou

2017

Euro-Mediterr J Environ Integr

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The recovery of fluoride from wastewater has great economic and environmental significance for the fluorine industry. Cryolite is an optimal product for fluorine recovery from high fluorine-containing wastewater. The cryolite with a high molar ratio is more valuable and is extensively used in the aluminum electrolytic industry. The present study aims to recover cryolite with a high molar ratio from high fluorine-containing wastewater through the crystallization process. The crystallization conditions of cryolite with a high molar ratio were investigated by laboratory experiment and thermodynamic modeling. The results show that the composition of the cryolite products may be a mixture of Na 3 AlF 6 and NaAlF 4 for the Al 3? -Na ? -F --H ? -H 2 O system. Favorable conditions for the formation of AlF 6 3-and Na 3 AlF 6 include higher pH, higher influent concentration of fluorine, and lower reaction temperature. Cryolite products with a high molar ratio can be recovered from high-fluorine containing wastewater at a pH range of 3.69-8.39, a reaction temperature of 20-30°C, and an a k of 3.11-4.44. The results can be used to predict and to guide the crystallization process of cryolite with a high molar ratio.

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“…EC is an intensively studied process and it has been successfully used to treat biodiesel wastewater, urban wastewater, chips manufacturing wastewater, landfill leachate, and dye stuff . Moreover, it has also been used for the removal of boron from aqueous solution, remediation of fluoride from pretreated photovoltaic wastewater, elimination of the malathion pesticide from polluted solutions, and simultaneous removal of hexavalent chromium and COD from industrial wastewater …”

Section: Introductionmentioning

confidence: 99%

Treatment of Dairy Industry Cleaning‐in‐Place Wastewater by Electrocoagulation Supported with Immersed Membrane Process

Ates

Özay

Dizge

2017

CLEAN Soil Air Water

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This study aims to develop an easy and economic technique for dairy cleaning‐in‐place wastewater treatment to obtain high‐quality treated wastewater effluent. A batch electrocoagulation (EC) study is conducted using iron and aluminum electrodes. The effects of various operational parameters are investigated on the treatment performance. Maximum soluble chemical oxygen demand (COD) removal efficiencies of 81% for an Fe–Fe electrode and 53% for an Al–Al electrode are obtained at an applied voltage of 10 V, an electrode spacing of 2 cm, pH of 7.2, for a reaction time of 60 min. Moreover, protein removal efficiencies of 72.6 and 79.4% are obtained for Fe–Fe and Al–Al electrodes, respectively. An immersed membrane is integrated into the EC reactor and the reactor is operated in continuous mode. COD removal efficiency is determined as 86.4 and 84.5% for Fe–Fe and Al–Al electrodes, respectively, in continuous mode. The protein removal efficiency is also calculated as 80.9 and 83.8% for Fe–Fe and Al–Al electrodes, respectively. The Fe–Fe electrode shows the maximum COD removal efficiency, whereas Al–Al provides the maximum protein removal efficiency. Additionally, field emission scanning electron microscopy (FE‐SEM) and Fourier transform IR spectroscopy (FT‐IR) are applied to describe fouling phenomena.

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Cost-effective electrocoagulation process for the remediation of fluoride from pretreated photovoltaic wastewater

Cited by 102 publications

References 17 publications

Wastewater disinfection by electrocoagulation process and its interaction with abiotic parameters

Wastewater disinfection by electrocoagulation process and its interaction with abiotic parameters

Recovery of cryolite with high molar ratio from high fluorine-containing wastewater

Treatment of Dairy Industry Cleaning‐in‐Place Wastewater by Electrocoagulation Supported with Immersed Membrane Process

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