Adsorption of copper(II) and chromium(III) ions onto amidoximated cellulose
Adsorption of copper(II) and chromium(III) ions onto amidoximated cellulose
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DOI：
10.1002/(sici)1097-4628(20000328)75:13
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发表时间：
2000-03
影响因子：
3
通讯作者：
R. Saliba;H. Gauthier;R. Gauthier;M. Petit-Ramel
中科院分区：
文献类型：
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作者：
R. Saliba;H. Gauthier;R. Gauthier;M. Petit-Ramel
纤维素粉的化学改性是通过在碱性介质中与丙烯腈相继反应，然后在羟胺水溶液中进行反应来制备胺肟化的纤维素胺。由于络合作用，在不同pH值的缓冲溶液中，胺肟基团可以固定重阳离子。吸附铜(II)、铬(III)离子的能力与载体中胺基的数量和污染溶液中金属的浓度有关。吸附极限值证明了1/1络合物的形成。用更强的络合剂如乙二胺四乙酸处理，可以使阳离子解吸。
Chemical modification of cellulose powder is performed by successive reactions with acrylonitrile in an alkaline medium followed by aqueous hydroxylamine to prepare amidoximated cellulose. Due to complexation, the amidoxime groups immobilize heavy cations from buffered solutions at various pH values. The capacity of adsorption for Cu(II) and Cr(III) ions is related to the amount of amidoxime groups in the support and to the metal concentration of the polluted solution. The formation of a 1/1 complex is proved by the adsorption limit values. Desorption of the cations is possible by treatment with a stronger complexing agent such as ethylenediaminetetracetic acid.