Tannin-Immobilized Collagen/Cellulose Bead as an Effective Adsorbent for Cu(II) in Aqueous Solutions
Tannin-Immobilized Collagen/Cellulose Bead as an Effective Adsorbent for Cu(II) in Aqueous Solutions
复制标题
单宁固定胶原/纤维素珠作为水溶液中 Cu(II) 的有效吸附剂
DOI：
10.1166/jbmb.2014.1480
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发表时间：
2014-12
影响因子：
0.5
通讯作者：
Yang, Haiyang
中科院分区：
文献类型：
--
作者：
Ding, Cuicui;Chen, Lihui;Huang, Liulian;Yang, Haiyang
胶原/纤维素珠通过由1-乙基-3-甲基咪唑乙酸盐重构胶原和纤维素（胶原/纤维素质量比= 1/6）来制备。在此基础上，利用胶原蛋白与杨梅单宁反应，制备了杨梅单宁固定化胶原蛋白/纤维素（BT-CC）小球。研究了BT-CC对水溶液中Cu（II）的吸附性能。SEM和XRD分析结果表明，吸附Cu（II）后，复合材料的结构得到了很好的保持。此外，在吸附Cu（II）之后，BT-CC的最大分解温度甚至增加了0.77 °C，证实了BT-CC的稳定性。BT-CC对Cu（II）的吸附表现出pH依赖性，在pH = 5.0时吸附量最大。以胶原蛋白的质量含量为基准，根据实验得到的吸附等温线，BT-CC在298、308和318 K时的最大吸附量分别为0.73、0.96和1.12 mmol/g。在动力学研究中，吸附平衡在298和318 K都达到约300 min，和实验数据可以很好地拟合的伪一级速率模型。BT-CC在3次吸附-脱附循环后仍保持良好的吸附性能。结果表明，BT-CC对Cu（II）具有较高的稳定性、较大的吸附容量和良好的重复使用性。
Collagen/cellulose bead was prepared by the reconstitution of collagen and cellulose (collagen/cellulose mass ratio = 1/6) from 1-ethyl-3-methylimidazolium acetate. Based on this, a novel bio-adsorbent, bayberry tannin immobilized collagen/cellulose (BT-CC) bead, was obtained via the reaction of collagen with bayberry tannin. The adsorption properties of BT-CC to Cu(II) in aqueous solution were investigated. Results from SEM and XRD indicated the well preservation of structure after the adsorption of Cu(II). Furthermore, the maximum decomposition temperature of BT-CC after the adsorption of Cu(II) was even increased for ∼7 °C, confirming the stability of BT-CC. The adsorption of Cu(II) on BT-CC displayed pH-dependence and the maximum adsorption was obtained at pH = 5.0. Based on the mass content of collagen, the maximum adsorption capacity of BT-CC was 0.73, 0.96 and 1.12 mmol/g at 298, 308 and 318 K, respectively, according to the experimental adsorption isotherms. In kinetics studies, the adsorption equilibrium at both of 298 and 318 K reached within ∼300 min, and the experimental data could be well fitted by the pseudo-first-order rate model. Furthermore, good adsorption properties of BT-CC remained after three cycles of adsorption–desorption. These results indicated that high stability, great adsorption capacity and good reusability of BT-CC as the adsorbent to Cu(II) could be obtained.