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Cobiss

Journal of the Serbian Chemical Society 2023 Volume 88, Issue 4, Pages: 437-450
https://doi.org/10.2298/JSC220623084B
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Full factorial design methodology approach to optimize the elimination of gallic acid from water by coagulation using activated acorns barks as coagulant-aid

Boulahia Nadjiba (Ecole Nationale Supérieure Agronomique (ENSA), Hacen Badi, El Harrach Alger, Algérie + Laboratoire de Maitrise de l’Eau en Agriculture, Ecole Nationale Supérieure Agronomique (ENSA), Hacen Badi, El Harrach Alger, Algérie)
Hank Dalila (Ecole Nationale Supérieure Agronomique (ENSA), Hacen Badi, El Harrach Alger, Algérie + Laboratoire des Sciences et Techniques de l’Environnement, Ecole Nationale Polytechnique, Hacen Badi, El Harrach Alger, Algérie)
Meridja Samir (Ecole Nationale Supérieure Agronomique (ENSA), Hacen Badi, El Harrach Alger, Algérie + Laboratoire de Maitrise de l’Eau en Agriculture, Ecole Nationale Supérieure Agronomique (ENSA), Hacen Badi, El Harrach Alger, Algérie)
Chergui Abdelmalek (Laboratoire des Sciences et Techniques de l’Environnement, Ecole Nationale Polytechnique, Hacen Badi, El Harrach Alger, Algérie + Ecole Nationale Polytechnique, Hacen Badi, El Harrach Alger, Algérie)

This study investigated the elimination of organic matter from water by the coagulation process using a biomaterial “acorns barks” as a coagulantaid with the presence of aluminium sulphate in low concentration. The removal of gallic acid from water was first studied by two processes: the adsorption on activated acorns barks, and coagulation by aluminium sulphate, separately. The hybrid system was then studied, and the optimal operating conditions were determined. The performance of the hybrid system (coagulation/adsorption) mainly depends on the initial concentration of gallic acid, the coagulant dose and the mass of coagulant-aid. A full factorial design 23 was used to determine the optimum conditions for gallic acid removal. The maximum removal of gallic acid in water was 92.48 %, achieved at 20 mg L-1 of initial gallic acid concentration, 50 mg L-1 of aluminium sulphate coagulant concentration and 1.5 g of activated acorns barks adsorbent mass. The application of these optimal conditions on urban wastewater for the elimination of organic matter has shown the performance of this hybrid system treatment.

Keywords: adsorption, biomaterial, hybrid system, optimization, urban wastewater


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