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。
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 mecha- nism 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 hydroxylphenyl groups in immobilized black wattle tannin.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2006年第3期266-271,共6页
Chemical Research and Application
基金
中科院与攀钢集团的院地合作项目"钒生产为水处理工艺探索及中试研究"资助)
关键词
胶原纤维
固化单宁
吸附
V(V)
collagen fibre
immobilized tannin
adsorption
V （ V ）
作者简介
联系人简介：袁世斌（1973-），男，副研究员，主要研究方向：材料化学。Email：yuansb@cib．ac．cn
