Publications Scientifiques
Permanent URI for this communityhttps://dspace.univ-boumerdes.dz/handle/123456789/10
Browse
5 results
Search Results
Item Continuous flow adsorption of orange acid II by coffee grounds in fixed bed column(University M'hamed Bougara - Boumerdes, 2020) Mahdi, K.; Benrachedi, K.A continuous fixed-bed column study on coffee grounds was carried out at bed depths 0.5-2 cm, flow rates of 0.18-0.53 mL.min-1with initial orange acid II concentrations of 20-100 mg.L-1 at room temperature. The breakthrough time of fixed-bed increased with the increase in bed depth, which permitted orange acid II to diffuse more into the interior of coffee grounds. But decreased with increasing initial concentration, and flow rate.The experimental data were in good agreement with both Thomas and Yoon-Nelson modelsItem Chemical production and characterisation of activated carbon from waste 'coffee grounds'(Inderscience Enterprises, 2013) Mekarzia, A.; Namane, A.; Benrachedi, K.; Belhaneche-Bensemra, NaimaItem Removal of malathion from polluted water by adsorption onto chemically activated carbons produced from coffee grounds(2014) Bouchenafa-Saïb, N.; Mekarzia, A.; Bouzid, B.; Mohammedi, O.; Khelifa, A.; Benrachedi, K.; Belhaneche, N.Item Determination of the adsorption capacity of activated carbon made from coffee grounds by chemical activation with ZnCl2 and H3PO4(2005) Namane, A.; Mekarzia, A.; Benrachedi, K.; Belhaneche-Bensemra, Naima; Hellal, A.In order to evaluate the adsorptive capacities of granular activated carbon produced from coffee grounds by chemical activation, the adsorption of different phenols and acid and basic dyes, has been carried out. The comparison with a commercial activated carbon has been made. Adsorption isotherms of phenols and dyes (acid and basic) onto produced and commercial granular activated carbons were experimentally determined by batch tests. Both Freundlich [1] and Langmuir [2] models are well suited to fit the adsorption isotherm data. As a result, the coffee grounds based activated carbon may be promising for phenol and dye removal from aqueous streamsItem Coupling ultrafiltration with adsorption on activated coffee for use as a reverse osmosis pretreatment(2009) Benrachedi, K.; Bensouali, K.; Houchati, H.The objective of this work was to replace the conventional pretreatment of reverse osmosis by coupling ultrafiltration with adsorption onto activated coffee-like adsorbent material. Adsorption was achieved on activated carbon prepared from a waste of coffee. A protocol of preparation is described as well as a characterization of the activated coffee. Physical and chemical activation was done. The development of a porous texture was proved by scanning electron micrography. A study of adsorption kinetic shows that the new material has a high adsorption capacity. The ultrafiltration–adsorption coupling is a good pretreatment for reverse osmosis