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Treatment of dairy wastewater by electrocoagulation using A-U4G (2017-Al) alloy and pure aluminum as electrode material

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Abstract

The electrocoagulation (EC) process is an efficient and low-cost system for the purification of wastewater. The aim of this work was to investigate the efficiency of two types of aluminum (Al) electrodes (Al alloy and pure Al electrodes) for the treatment of synthetic semi-skimmed milk wastewater. Turbidity, chemical oxygen demand (COD), and concentration of Al species were monitored during the experiments. The effect of various parameters, such as current density and type and nature of the electrode were examined. The results showed that Al alloy electrodes exhibited a higher efficiency than pure Al electrodes. A quasi-total reduction of turbidity and a removal of approximately 58% of the COD were achieved within 24 min at pH 7 and a current density of 14.3 mA cm−2. It was also observed that the removal performance was not affected by the state of the electrode surfaces (polished) under the same operating conditions.

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Acknowledgments

The authors acknowledge the financial support of the Ministry of Higher Education and Scientific Research of Algeria.

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Authors and Affiliations

  1. Laboratory of Physical Chemistry of Materials, Department of Chemistry, Faculty of Sciences and Technology, Chadli Bendjedid University, B.P. 36, 36000, El Tarf, Algeria

    Adel Aitbara

  2. Laboratory of Water Treatment and Valorization of Industrial Wastes, Department of Chemistry, Faculty of Sciences, Badji-Mokhtar University, B.P.12, 23000, Annaba, Algeria

    Adel Aitbara, Assia Khelalfa, Marwa Bendaia, Rahma Abrane & Sabir Hazourli

  3. Laboratory of Silicates, Polymères and Nanocomposites (LSPN), 8 Mai 1945 University, B.P 401, 24000, Guelma, Algeria

    Assia Khelalfa

  4. Univ rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR – UMR6226, 35000, Rennes, France

    Abdeltif Amrane

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  1. Adel Aitbara
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  2. Assia Khelalfa
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Correspondence to Abdeltif Amrane.

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Communicated by Nicolas Roche, Chief Editor.

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Aitbara, A., Khelalfa, A., Bendaia, M. et al. Treatment of dairy wastewater by electrocoagulation using A-U4G (2017-Al) alloy and pure aluminum as electrode material. Euro-Mediterr J Environ Integr 6, 19 (2021). https://doi.org/10.1007/s41207-020-00227-2

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