Arsenic Removal from Natural Groundwater by Electrocoagulation Using Response Surface Methodology

García-Lara, A. M.; Montero‐Ocampo, C.; Equihua-Guillén, F.; Camporredondo-Saucedo, J. E.; Servin-Castañeda, Rumualdo; Muñiz-Valdés, Carlos Rodrigo

doi:10.1155/2014/857625

Cited by 11 publications

(2 citation statements)

References 31 publications

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“…For current applied, most of the works showed a higher arsenic removal efficiency when the current intensity applied is increased (Can et. al., 2014;García et. al., 2014;Kumar et.…”

mentioning

confidence: 99%

Statistical optimization of arsenic removal from synthetic water by electrocoagulation system and its application with real arsenic-polluted groundwater

Mendoza-Chávez

Carabin

Dirany

et al. 2020

Environmental Technology

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Arsenic presence in water has become one of the most concerning environmental problems. Electrocoagulation is a technology that offers several advantages over conventional treatments such as chemical coagulation. In the present work, an electrocoagulation system was optimized for arsenic removal at initial concentrations of 100 µg/L using response surface methodology. The effects of studied parameters were determined by a 23 factorial design; whereas treatment time had a positive effect and current intensity had negative effect on arsenic removal efficiency. With a p-value 0.1629 and a confidence level 99%, the type of electrode material did not have significant effect on arsenic removal. Efficiency over 90% was reached at optimal operating conditions of 0.2 A of current intensity, and 7 min of treatment time using iron as the electrode material. However, the time necessary to accomplish with OMS arsenic guideline 10 µg/L increased from 7 to 30 minutes when real arsenic contaminated-groundwater with an initial concentration of 80.2 ± 3.24 µg/L was used. The de of a pilot-scale electrocoagulation reactor was determined with the capacity to meet the water requirement of a 6417 population community in Sonora, Mexico. To provide the 1.0 L/s required, an electrocoagulation reactor with a working volume of 1.79 m3, a total electrode effective surface of 701 m2, operating at a current intensity of 180 A and an operating cost of 0.0208 US$/day was proposed. Based on these results, electrocoagulation can be considered an efficient technology to treat arseniccontaminated water and meet the drinking water quality standards.

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“…For current applied, most of the works showed a higher arsenic removal efficiency when the current intensity applied is increased (Can et. al., 2014;García et. al., 2014;Kumar et.…”

mentioning

confidence: 99%

Statistical optimization of arsenic removal from synthetic water by electrocoagulation system and its application with real arsenic-polluted groundwater

Mendoza-Chávez

Carabin

Dirany

et al. 2020

Environmental Technology

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show abstract

“…The swift As removal was observed at the beginning of the EC process when arsenic ions were abundant at the electrolysis start. Further, Fe or Al hydroxides generated by the anodic electro dissolution form time dependent complexes dragged out by the feed-groundwater flow out from the reactor [15]. However, the most efficient As removal with respect to lower EC reactor operating time was obtained for the Fe-Fe-Al-Fe combination.…”

Section: Effects Of Fe-al Electrode Combinations On As Removalmentioning

confidence: 98%

Effects of combined Fe-Al electrodes and groundwater temperature on arsenic removal by electrocoagulation

Mohora¹,

Rončević²,

Agbaba³

et al. 2019

Environ. Protect. Eng.

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The removal of arsenic from groundwater by continuous electrocoagulation (EC) using combined Fe-Al electrodes at its natural temperature (16.1±0.2 °C) was comprehensively evaluated. The results obtained indicated that all studied Fe-Al electrode combinations were able to reduce As concentration below 10 μg/dm 3. Nevertheless, the Fe-Fe-Al-Fe electrode combination was the most suitable due to its highest arsenic removal capacity (0.354 µg As/C) for the lowest charge loading 68.4 C/dm 3. The specific consumption of Fe was 0.0339 kg Fe/m 3 and of Al electrodes 0.0145 kg Al/m 3. The operating cost was estimated at 0.182 €/m 3. The increase of the groundwater temperature by 8 °C from its natural temperature influenced increase of the Fe and Al electrodes dissolution rate by 30% and 17%, respectively and that of As removal efficiency by 16%. The residual Fe and Al concentrations in 500 dm 3 of treated groundwater were below WHO guideline values for drinking water. Long-term field operation of the pilot-scale continuous EC reactor is required to validate effectiveness, reliability and robustness of the EC technique for arsenic removal from groundwater confirmed in laboratory conditions.

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Effective removal of arsenide from aqueous solutions using mesoporous CoFe2O4/graphene oxide nanocomposites assisted by artificial intelligence

Wang

et al. 2021

Carbon Lett.

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Arsenic Removal from Natural Groundwater by Electrocoagulation Using Response Surface Methodology

Cited by 11 publications

References 31 publications

Statistical optimization of arsenic removal from synthetic water by electrocoagulation system and its application with real arsenic-polluted groundwater

Statistical optimization of arsenic removal from synthetic water by electrocoagulation system and its application with real arsenic-polluted groundwater

Effects of combined Fe-Al electrodes and groundwater temperature on arsenic removal by electrocoagulation

Effective removal of arsenide from aqueous solutions using mesoporous CoFe2O4/graphene oxide nanocomposites assisted by artificial intelligence

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