期刊
CARBOHYDRATE POLYMERS
卷 79, 期 1, 页码 184-191出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2009.07.048
关键词
Adsorption; Mercerization; Modified sugarcane bagasse; Ethylenediaminetetraacetic dianhydride; Hardness water
资金
- Brazilian Government Agencies: Funda Ao de Amparo a Pesquisa do Estado de Minas Gerais - FAPEMIG
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - CAPES
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. (C) 2009 Elsevier Ltd. All rights reserved.
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