Crosslinking of Chitosan with a Trifunctional Crosslinker and the Adsorption of Acid Dyes and Metal Ions onto the Resulting Polymer
Crosslinking of Chitosan with a Trifunctional Crosslinker and the Adsorption of Acid Dyes and Metal Ions onto the Resulting Polymer
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DOI：
10.1260/026361706778062568
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发表时间：
2006-02
影响因子：
2.9
通讯作者：
Y. Shimizu;Yoshihiro Saito;Takeo Nakamura
中科院分区：
文献类型：
--
作者：
Y. Shimizu;Yoshihiro Saito;Takeo Nakamura
使用三官能试剂作为交联剂合成了新型壳聚糖基吸附材料，并评估了所得聚合物对两种酸性染料和几种金属离子的吸附能力。具有最低取代度的交联壳聚糖对CI酸性橙7表现出非常高的吸附能力。降低取代度和染料溶液的pH值导致吸附能力增加。取代度最低的交联壳聚糖对Cu2+离子表现出相当显着的吸附能力。对二价金属离子的吸附按以下顺序减少：Cu2+»Ni2+>Cd2+、Pb2+、Ca2+。
Novel chitosan-based adsorbent materials were synthesized using a trifunctional reagent as a crosslinker and the adsorption capability of the resulting polymers towards two acid dyes and several metal ions was evaluated. The crosslinked chitosan with the lowest degree of substitution showed a very high adsorption capability towards CI Acid Orange 7. Decreasing the degree of substitution and the pH of the dye solution led to an increase in the adsorption capability. The crosslinked chitosan with the lowest degree of substitution exhibited quite remarkable adsorption powers towards the Cu2+ ion. Such adsorption towards divalent metal ions decreased in the following sequence: Cu2+ » Ni2+ > Cd2+, Pb2+, Ca2+.