Use of Electrocoagulation with Aluminum Electrodes to Reduce Hardness in Tunisian Phosphate Mining Process Water

Brahmi, Khaled; Bouguerra, Wided; Belhsan, Hamza; Elaloui, Elimame; Loungou, Mouna; Tlili, Zied; Hamrouni, Béchir

doi:10.1007/s10230-015-0354-4

Cited by 17 publications

(4 citation statements)

References 30 publications

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“…In general, the SSV data was in line with the results of Brahmi et al [46] showing that the most important drawback of the EC process are the long settling time periods. Whilst the results were contrary to the opinion of Ashraf et al [47] who found that over time, the flocs settled well and reached a minimum of about 200 mL L −1 .…”

Section: Interaction Of Electrolysis Time and Current On Settled Slud...supporting

confidence: 88%

Reclamation of forward osmosis reject water containing hexavalent chromium via coupled electrochemical-physical processes

Mousazadeh

Naghdali

Kabdaşlı

et al. 2022

Environmental Technology

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Section: Interaction Of Electrolysis Time and Current On Settled Slud...supporting

confidence: 88%

Reclamation of forward osmosis reject water containing hexavalent chromium via coupled electrochemical-physical processes

Mousazadeh

Naghdali

Kabdaşlı

et al. 2022

Environmental Technology

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“…The electrodes were cleaned before each test by treating them with NaOH (2 M) and HCl (2 M) aqueous solutions after mechanically polishing underwater with abrasive paper [10,12]. The initial pH of the solutions was adjusted by adding either HCl (0.1 M) or NaOH (0.1 M) and NaCl as supporting electrolyte.…”

Section: Electocogulation Testmentioning

confidence: 99%

“…Electrochemical technology contributes in many ways to a cleaner environment and covers a very broad range of technology [10][11][12]. Electrocoagulation process is one of the electrochemical methods that have been developed for drinking water treatment.…”

Section: Introductionmentioning

confidence: 99%

Fluoride removal from synthetic groundwater by electrocoagulation process: parametric and energy evaluation

Chibani¹,

Barhoumi²,

Ncib³

et al. 2019

Desalination and Water Treatment

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This study investigates the effect of several parameters on the electrocoagulation process has been studied in order to optimize the evolution of the fluoride removal percentage and the energy consumption. Optimum experimental conditions of fluoride removal were determined as: pH i = 6, J = 0.27 mA/cm 2 , t EC = 30 min, [NaCl] = 0.5 g/L, d i = 1 cm, S/V = 7.2 m-1 and Stirring speed = 300 rpm with two aluminum electrodes. These operating conditions are allowed to achieve fluoride removal of over 85% in a relatively short operating time with low energy consumption (0.0396 kWh/m 3). The results fitted with the Langmuir and Freundlich equations showed that fluoride removal was achieved by a monolayer adsorption, with a finite number of identical sites. To study the rate-limiting step, the kinetic data of fluoride were analyzed using first-order and second-order kinetic models. Under optimal conditions with 10 and 20 min treatment, fluoride was completely removed for initial concentration of 3 and 6 mg/L respectively. Moreover, for fluoride initial concentration of 10 mg/L, it is possible to reach a residual concentration under the limit recommended by WHO for fluoride concentration in drinking water (1.5 mg/L) with lowest consumption of electricity.

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“…Khairi et al (2011) removed hardness from drinking water using electrochemical cell.The operating parameters of electrode type (Al cathodes and graphite anodes), initial pH (7-8), electric potential (10-28.5 V), electrode spacing (2-4 cm) and operating time were studied. The 85% of hardness was removed at pH of 7.5, detention time of 1 hours and electrical voltage of 28.5V Brahmi et al (2016). used aluminum electrodes to reduce non-carbonate hardness in Tunisian Phosphate Mining process water.…”

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confidence: 99%

Effect of operating conditions and ion contaminations on electro coagulation and oxidation processes for water quality improvement

Theng

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The objective of this study is to investigate the effect of ion contaminations and operating conditions on Electro Coagulation (EC) and Oxidation (EO) in turbidity and natural organic matter (NOM) removal. The experiments were conducted in 4 liters column. Ferrous and calcium were chosen as contaminated ions. The operating condition was varied in terms of initial pH and current density. 100 NTU turbidity and 70 mg/L NOM were synthesized from bentonite and humic acid (HA), respectively. The results showed that bipolar arrangement of electrodes with 2 cm gap was the optimal condition in terms of gas flow rate and electrode corrosive ratio (Qg/Loss) as well as the treatment performance. From kinetic study, turbidity was removed through destabilization mechanism while HA was removed faster by physical attractive force and sweep floc mechanism. The optimal operation time was found at 20 minutes. It was then selected for analyzing the effect of co-ions and operating conditions. Based on the result, calcium, ferrous, and initial pH were significant effect on turbidity removal while current density, initial pH, and ferrous were significant effect on HA removal. The optimal condition on turbidity removal was found at ferrous 1 mg/L, calcium 18 mg/L, initial pH 8, and current density 3.4 mA/cm2. HA was obtained at ferrous 25 mg/L, calcium 8 mg/L, initial pH 5, and current density 4 mA/cm2. The effluent of the worst condition of HA was then taken place for EO process. Aluminum cathode and conductive carbon coated onto graphite anode were the best condition for EO electrode material. The optimal condition was found at current density 5.5 mA/cm2 and operating time 20 minutes in monopolar arrangement for EO process to remove 37 mg/L HA.

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Use of Electrocoagulation with Aluminum Electrodes to Reduce Hardness in Tunisian Phosphate Mining Process Water

Cited by 17 publications

References 30 publications

Reclamation of forward osmosis reject water containing hexavalent chromium via coupled electrochemical-physical processes

Reclamation of forward osmosis reject water containing hexavalent chromium via coupled electrochemical-physical processes

Fluoride removal from synthetic groundwater by electrocoagulation process: parametric and energy evaluation

Effect of operating conditions and ion contaminations on electro coagulation and oxidation processes for water quality improvement

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