| 胶原纤维固化黑荆树单宁吸附V(V)的研究 |
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| 引用本文： | 李娜,袁世斌,李旭东.胶原纤维固化黑荆树单宁吸附V(V)的研究[J].化学研究与应用,2006,18(3):266-271. |
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| 作者姓名： | 李娜 袁世斌 李旭东 |
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| 作者单位： | 1. 成都理工大学材料与生物工程学院,四川,成都,610059;中国科学院成都生物研究所,四川,成都,610041
2. 中国科学院成都生物研究所,四川,成都,610041 |
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| 基金项目： | 中国科学院与攀钢集团的院地合作项目 |
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| 摘 要： | 研究了胶原纤维固化黑荆树单宁对V(V)的吸附。采用不同温度、pH值等条件进行吸附研究,并进一步探讨了固化黑荆树单宁的吸附动力学和吸附柱动力学及其吸附机理。结果表明,该材料对V(V)的吸附平衡符合Freund lich方程,温度对吸附平衡的影响不明显;吸附动力学可用拟二级速度方程来描述,该材料同时具有良好的柱动力学特性;V(V)的吸附过程可能存在三个反应,即V(V)与吸附剂之间发生氧化还原反应生成V(IV),V(IV)和-COOH之间发生离子交换反应,以及V(IV)与单宁的邻位羟基发生螯合。
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| 关 键 词： | 胶原纤维 固化单宁 吸附:V(V) |
| 文章编号： | 1004-1656（2006）-0266-06 |
| 收稿时间： | 2005-09-23 |
| 修稿时间： | 2005-11-20 |
Study on adsorption behaviors of V(V)on collagen fiber immobilized black wattle tannin |
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| LI Na,YUAN SHi-bin,LI Xu-dong.Study on adsorption behaviors of V(V)on collagen fiber immobilized black wattle tannin[J].Chemical Research and Application,2006,18(3):266-271. |
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| Authors: | LI Na YUAN SHi-bin LI Xu-dong |
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| Institution: | 1. College of Materials and Bioengineering, Chengdu University of Technology,Chengdu 610059,China; 2. Chengdu Institute of Biology, Chinese Academy of sciences, Chengdu 610041, China |
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| Abstract: | The Adsorption of V(V) on collagen fibre immobilized black wattle tannin was studied under different temperatures and pH values.A dsorption kinetics,column adsorption kinetics to V(V)and the adsorption mechanism were also studied.The results show that adsorption isotherms of immobilized black wattle tannin ofV(V)can be described by the Freundlich model and the influence of temperature on adsorption isotherms are unobvious.The adsorption rate can be well fitted by pseudo-second-order rate model.Collagen fiber immobilized black wattle tannin has excellent properties of column adsorption kinetics.The adsorption mechanism of V(V) consisted of three reaction steps:redox between V(V)and adsorbent,ion exchange between reduced V(IV)and-COOH,and then chelation between the reduced V(IV)and the adjacent hydroxylpheny1 groups in immobilized black wattle tannin. |
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| Keywords: | collagen fibre immobilized tannin adsorption V(V) |
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