Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/5029
Title: Removal of Ca(II) and Mg(II) from aqueous single metal solutions by mercerized cellulose and mercerized sugarcane bagasse grafted with EDTA dianhydride (EDTAD).
Authors: Karnitz Júnior, Osvaldo
Gurgel, Leandro Vinícius Alves
Gil, Laurent Frédéric
Keywords: Adsorption
Mercerization
Modified sugarcane bagasse
Ethylenediaminetetraacetic dianhydride
Hardness water
Issue Date: 2010
Citation: KARNITZ JÚNIOR, O.; GURGEL, L V. A.; GIL, L. F. Removal of Ca(II) and Mg(II) from aqueous single metal solutions by mercerized cellulose and mercerized sugarcane bagasse grafted with EDTA dianhydride (EDTAD). Carbohydrate Polymers, v. 79, p. 184-191, 2010. Disponível em: <http://www.sciencedirect.com/science/article/pii/S014486170900410X>. Acesso em: 02 fev. 2015.
Abstract: In a previous work, chemically modified cellulose (EMC) and sugarcane bagasse (EMMB) were prepared from mercerized cellulose (MC) and twice-mercerized sugarcane bagasse (MMB) using ethylenediaminetetraacetic dianhydride (EDTAD) as modifying agent. In this work we described in detail the modification of these materials in function of reaction time and EDTAD amount in the reaction media. The resistance of ester bond at pH 1, 2, 11, and 12 was also evaluated by FTIR. The results were used to model the hydrolysis process and a kinetic model was proposed. The modified materials (EMMB and EMC) were used to adsorb Ca2+ and Mg2+ ions from aqueous single solutions. The adsorption isotherms were developed at two pH values. These materials showed maximum adsorption capacities for Ca2+ and Mg2+ ions ranging from 15.6 to 54.1 mg/g and 13.5 to 42.6 mg/g, respectively. The modified material from sugarcane bagasse (EMMB) showed larger maximum adsorption capacities than modified material from cellulose (EMC) for both metals.
URI: http://www.repositorio.ufop.br/handle/123456789/5029
metadata.dc.identifier.doi: https://doi.org/10.1016/j.carbpol.2009.07.048
ISSN: 0144-8617
metadata.dc.rights.license: O periódico Carbohydrate Polymers concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3581981052974.
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