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Effect of the acid treatment of olive stone on the biosorption of lead in a packed - bed column / Monica Calero de Hoces in Industrial & engineering chemistry research, Vol. 49 N° 24 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12587–12595 Titre : Effect of the acid treatment of olive stone on the biosorption of lead in a packed - bed column Type de document : texte imprimé Auteurs : Monica Calero de Hoces, Auteur ; Gabriel Blazquez Garcia, Auteur ; Alicia Ronda Galvez, Auteur Année de publication : 2011 Article en page(s) : pp. 12587–12595 Note générale : Chimie industrielle Mots-clés : Biosorption Résumé : Biosorption of lead(II) ions from aqueous solutions by untreated, HCl-treated, H2SO4-treated, HNO3-treated, and H3PO4-treated olive stone was studied in a continuous-upflow packed-bed column. The effect of acid treatment on the lead biosorption capacity of olive stone was determined by evaluating the breakthrough curves obtained at different inlet concentrations of lead, changing from 10 to 150 mg/L. Results indicated that the treatment of olive stone with inorganic acids improves significantly its capacity to removal lead ions from aqueous solution. Finally, the Adams−Bohart, Thomas, Yoon and Nelson, and dose−response models were used to analyze the experimental data to determine the characteristic parameters of the column useful for process design. In particular, the dose−response model was able to simulate breakthrough curves at lower and higher time periods with high correlation coefficients. The maximum column biosorption capacity predicted by this model at an inlet lead concentration of 150 mg/L was 1.31 mg/g for unmodified olive stone and 14.03 mg/g for olive stone treated by H2SO4. Also, the pH variations during the sorption process have been reported. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1013597 [article] Effect of the acid treatment of olive stone on the biosorption of lead in a packed - bed column [texte imprimé] / Monica Calero de Hoces, Auteur ; Gabriel Blazquez Garcia, Auteur ; Alicia Ronda Galvez, Auteur . - 2011 . - pp. 12587–12595. Chimie industrielle in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12587–12595 Mots-clés : Biosorption Résumé : Biosorption of lead(II) ions from aqueous solutions by untreated, HCl-treated, H2SO4-treated, HNO3-treated, and H3PO4-treated olive stone was studied in a continuous-upflow packed-bed column. The effect of acid treatment on the lead biosorption capacity of olive stone was determined by evaluating the breakthrough curves obtained at different inlet concentrations of lead, changing from 10 to 150 mg/L. Results indicated that the treatment of olive stone with inorganic acids improves significantly its capacity to removal lead ions from aqueous solution. Finally, the Adams−Bohart, Thomas, Yoon and Nelson, and dose−response models were used to analyze the experimental data to determine the characteristic parameters of the column useful for process design. In particular, the dose−response model was able to simulate breakthrough curves at lower and higher time periods with high correlation coefficients. The maximum column biosorption capacity predicted by this model at an inlet lead concentration of 150 mg/L was 1.31 mg/g for unmodified olive stone and 14.03 mg/g for olive stone treated by H2SO4. Also, the pH variations during the sorption process have been reported. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1013597