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- 저자 : Louadj, Amel (검색결과 1 건)
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Louadj, Amel,Bouras, Omar,Rebahie, Ihssene,Cheknane, Omar,Zermane, Faiza Techno-Press 2021 Advances in environmental research Vol.10 No.2
Composite granules (named Fe-PILMG) based on both an Algerian montmorillonite with iron and gluten as an inert binder are prepared and used in the elimination of cadmium by dynamic adsorption in fixed bed columns. This study is essentially focused on the adsorption of Cd (II) in dynamic mode on a fixed bed based on Fe-PILMG sorbent granules followed by a study on the chemical regeneration of these new saturated adsorbents. The various regeneration tests are carried out with NaOH solution. The experimental data on the elimination of Cd (II) (pH = 7, T = 20 ± 2℃) in dynamic mode reveal that this adsorption is considerably influenced by the flow rate (2 to 5 mL min-1), Cd (II) initial concentration (20 to 50 mg L-1), and bed height (5 and 15 cm) and that a modification of each of these parameters can strongly influence the efficiency of this process. The assessment of the experimental data is carried out using the Thomas, Yoon & Nelson and Bohart-Adams models. The fit of the experimental and modeled breakthrough curves indicates excellent applicability of the mathematical models studied which is confirmed by high values of the correlation coefficient for the Bohart-Adams model (R<sup>2</sup> = 0.99, model constants N0 = 634.87 mg L-1, kBA = 0.079 (L (mg min)-1), from Yoon and Nelson model (R<sup>2</sup> = 0.97, ζ = 413.03 min, KYN = 0.0049 min-1), Thomas (R<sup>2</sup> = 0.98, q0 = 49.03 mg g-1, KTH = 5.21 mL (mg. min)-1).
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