Search

The main objective of the present study is to evaluate the sorption capacities of some natural raw materials of vegetable origin for the treatment of the sewage coming from the textile industry. The selected barks are: maritime pine (MP), pine pinion (PP) and Aleppo pine (AP) bark. The effectiveness of these barks was evaluated in the removal of three dye; rhodamine B (RhB), Green Malachite (GM) and Methyl Orange (MO). Initially, the effects of some parameters such as the nature of the adsorbents, the nature of the dyes and the pH were studied. Obtained results reveals that the speed sorption is strongly influencing by the pH medium and the comparative study shows that the adsorption is favourable in the acidic medium with a sorbed amount of (Q=40mg/g) for rhodamine B. The results of the biosorption kinetics reveal that the GM molecules are better biosorbed (Q=48 mg/g) than those of RhB (Q=46 mg/g) and methyl orange (Q=18mg/g), with an equilibrium time of 6 hours. The results of the biosorption isotherms show clearly that the maritime pine bark is the most effective biosorbents with sorbed amount of (QRhB=200mg/g) and (QMO=88mg/g) followed by pignon pine (PP) with (QRhB=184mg/g) and (QMO=56mg/g) and finally Aleppo pine (AP) bark with (QRhB=131mg/g) and (Qmo=46mg/g). All obtained isotherms are modeled using the Langmuir and Freundlich models. According to the adjustment coefficient values R2, corresponding isotherms are well represented by Freundlich model.

Copyright of Silva Lusitana is the property of Unidade de Investigacao de Silvicultura e Productos Florestais and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Silva Lusitana is the property of Unidade de Investigacao de Silvicultura e Productos Florestais and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Annals of Forest Science (EDP Sciences) is the property of EDP Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)