@article{Boulahia_Hank_Meridja_Chergui_2023, place={Belgrade, Serbia}, title={Full factorial design methodology approach to optimize the elimination of gallic acid from water by coagulation using activated acorns barks as coagulant-aid: Scientific paper}, volume={88}, url={https://shd-pub.org.rs/index.php/JSCS/article/view/11943}, DOI={10.2298/JSC220623084B}, abstractNote={<p>This study investigated the elimination of organic matter from water by the coagulation process using a biomaterial “acorns barks” as a coagulant-aid 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 2<sup>3</sup> 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<sup>-1</sup> of initial gallic acid con­cen­tration, 50 mg L<sup>-1</sup> 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.</p>}, number={4}, journal={Journal of the Serbian Chemical Society}, author={Boulahia, Nadjiba and Hank, Dalila and Meridja, Samir and Chergui, Abdelmalek}, year={2023}, month={Jan.}, pages={437–450} }