In:
Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 399-401 ( 2011-11), p. 1282-1288
Abstract:
In this paper, ions i.e. Cu 2+ , Pb 2+ and Cd 2+ were absorbed by the amphoteric bagasse hemicelluloses, and the influences of pH value, adsorption time and the initial concentration of metal ion have been studied. The results show that the optimal adsorption pH values for Cu 2+ , Pb 2+ and Cd 2+ are 6.5, 6.0 and 7.5, respectively. The adsorption capacity to ions Cu 2+ , Pb 2+ and Cd 2+ reaches the maximum values when the adsorption time is 180 min. Net adsorption to ions Cu 2+ , Pb 2+ and Cd 2+ increases with increasing the initial concentration of the metal ions. Analysis results of adsorption dynamics show that the adsorption of Cu 2+ , Pb 2+ and Cd 2+ follows Ho 's Pseudo second-order kinetics linear model. It can be seen from the adsorption isothermal research that absorption of the amphoteric bagasse hemicelluloses to ions Cu 2+ , Pb 2+ and Cd 2+ can be well described by the Langmuir isotherm linear model. Moreover, the theoretical values of the maximum absorption capacity qmax for ions Cu 2+ , Pb 2+ and Cd 2+ were determined to be 21.98 mg/g, 81.97 mg/g and 31.85 mg/g, respectively.
Type of Medium:
Online Resource
ISSN:
1662-8985
DOI:
10.4028/www.scientific.net/AMR.399-401
DOI:
10.4028/www.scientific.net/AMR.399-401.1282
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2011
detail.hit.zdb_id:
2265002-7
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