Development of an empirical model for fluoride removal from photovoltaic wastewater by electrocoagulation process

Drouiche, Nadjib; Aoudj, S.; Lounici, H.; Mahmoudi, Hacène; Ghaffour, Noreddine; Goosen, Mattheus F. A.

doi:10.5004/dwt.2011.1966

Cited by 55 publications

(19 citation statements)

References 24 publications

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“…Many researchers reported that the current intensity influenced the electro-chemical process efficiency [5,7,10]. In order to assess current effect on the present process, runs were done by applying the following intensities: 320, 480, 640 and 800 mA.…”

Section: Effect Of Current Intensitymentioning

confidence: 99%

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Development of an integrated electro-coagulation–flotation for semiconductor wastewater treatment

Aoudj

Khelifa

Drouiche

et al. 2014

Desalination and Water Treatment

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In this study, an electro-coagulation-flotation process was used as a polishing treatment of semiconductor wastewater after precipitation. Batch mode experiments were undertaken using aluminium sheets as anode and stainless steel as cathode. Experiments on a synthetic solution showed that coupling electro-coagulation with electro-flotation in the same cell is efficient for simultaneous defluoridation and clarification. This combination was carried out by proper electrode arrangement and material choice. The performance is ascribed to the combined effect of anodically created coagulants and hydrogen micro-bubbles evolving on the cathode. The effects of the main parameters: electrode nature and arrangement, treatment time, current intensity, initial pH, initial concentration, type and concentration of supporting electrolytes were studied. Defluoridation efficiency may reach 90% corresponding to residual fluoride of 4.61 mg/L, while, turbidity removal efficiency may reach about 85% which corresponds to a residual turbidity of 3.09 NTU. The obtained final concentrations comply with national hazardous waste regulations.

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Section: Effect Of Current Intensitymentioning

confidence: 99%

“…Aluminium salts reduce excessive residual fluoride and destabilize colloidal CaF 2 particles. This step is followed by flocculent addition to enhance solid-liquid separation by sedimentation, flotation or filtration [1,[5][6][7]. However, to ensure effectiveness of the process, big quantities of reagents are added.…”

Section: Introductionmentioning

confidence: 99%

Development of an integrated electro-coagulation–flotation for semiconductor wastewater treatment

Aoudj

Khelifa

Drouiche

et al. 2014

Desalination and Water Treatment

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“…It also plays a role in bone health [1][2][3][4]. The contamination of fluoride in groundwater and surface water could come either from natural geological sources or from industries such as glass treatment, fertilizer, photovoltaic solar cells industry, semiconductor manufacturing and metal finishing industries [5,6]. There are various defluoridation treatment technologies, such as, adsorption, coagulation, membrane processes and electrochemical techniques.…”

Section: Introductionmentioning

confidence: 99%

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

Palahouane

Drouiche

Aoudj

et al. 2015

Journal of Industrial and Engineering Chemistry

102

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“…Several biological, physical, and chemical treatment processes have been suggested for the removal of dyes from aqueous waste streams, such as adsorption, biosorption, membrane processes, advanced oxidation, chemical coagulation, flocculation, and electrochemical methods such as electrooxidation [1][2][3] and electrocoagulation [4][5][6][7][8][9][10][11].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Electrochemical treatment of actual dye house effluents using electrocoagulation process directly powered by photovoltaic energy

Marmanis

Dermentzis

Christoforidis

et al. 2014

Desalination and Water Treatment

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In the present work, the decolorization treatment of colored wastewaters produced from polyamide textile dyeing is studied using the electrocoagulation process with sacrificial aluminum electrodes. The electrical energy is obtained from a solar photovoltaic array by directly connecting it to the electrocoagulator without batteries. The photovoltaic electrocoagulation (PV-EC) system is made versatile according to the instantaneous solar irradiation by adjusting the wastewater flow rate to the current intensity supplied by the photovoltaic array. All the PV-EC experiments were performed in Kavala Institute of Technology (latitude 40˚55´, longitude 24˚22´, and altitude 138 m above the sea level). The purpose of this paper is to investigate all parameters affecting the efficiency of the process, such as initial wastewater pH, conductivity, operating time, flow rate, and solar irradiation. The efficiency of the EC process was followed by measurements of turbidity and chemical oxygen demand (COD). According to the obtained experimental results, fast and effective decolorization of the treated wastewater occurred in a few minutes of electroprocessing. Turbidity was quantitatively reduced from 103 to 0.2 NTU, amounting to a removal percentage of over 99%, whereas COD was reduced by 65%. The proposed process is appropriate for decolorizing colored textile dye wastewaters and especially for small applications in remote and isolated locations without connection to public electric grid.

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Development of an empirical model for fluoride removal from photovoltaic wastewater by electrocoagulation process

Cited by 55 publications

References 24 publications

Development of an integrated electro-coagulation–flotation for semiconductor wastewater treatment

Development of an integrated electro-coagulation–flotation for semiconductor wastewater treatment

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

Electrochemical treatment of actual dye house effluents using electrocoagulation process directly powered by photovoltaic energy

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