Cation removal using cellulose chemically modified by a Schiff base procedure applying green principles

被引：44
作者：
da Silva Filho, Edson C. [1 ,2 ]
de Melo, Julio C. P. [3 ]
da Fonseca, Maria G. [4 ]
Airoldi, Claudio [3 ]
机构：
[1] Univ Fed Piaui, BR-64800000 Floriano, PI, Brazil
[2] Univ Fed Piaui, BR-64900000 Bom Jesus, PI, Brazil
[3] Univ Estadual Campinas, Inst Chem, BR-13084971 Campinas, SP, Brazil
[4] Univ Fed Paraiba, Dept Quim, BR-58059900 Joao Pessoa, Paraiba, Brazil
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2009年 / 340卷 / 01期
基金：
巴西圣保罗研究基金会;
关键词：
Modified cellulose; Schiff base; Free solvent; Cation adsorption; ADSORPTION; PRECONCENTRATION; THERMODYNAMICS; BEHAVIOR; CENTERS; SYSTEM; COPPER; WASTE; PHASE;
D O I：
10.1016/j.jcis.2009.08.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pentane-2,4-dione (acetylacetone) molecules were covalently incorporated under several different conditions to etilylene-1,2-diamine (en)-modified cellulose, using polar solvents or without solvents. The quantitative amount of en incorporated was given from 0.37 +/- 0.01 to 3.03 +/- 0.01 mmol of nitrogen per grain of cellulose, depending on the synthetic routes and after Schiff base formation this percentage was reduced by 1.38-6.12%. The synthetic routes indicated that lower solvent volumes produced higher amounts of en incorporation. However, the highest degree of pendant groups on the polymeric cellulose structure was obtained from a solvent-free reaction route. This procedure was applied for synthesizing all Schiff bases, causing a decrease in the amount of nitrogen. The available basic centers on the best covalently bonded biopolymer were investigated for adsorption of divalent copper, cobalt, nickel, and zinc from aqueous solution, with a capacity order Of Cu2+ > Co2+ > Ni2+ > Zn2+. Published by Elsevier Inc.
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页码：8 / 15
页数：8
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