摘要
纤维素基磁性聚偕胺肟树脂（BMAO）吸附AuCl-4、IrCl2-6、PdCL2-4和PtCl2-6等贵金属配阴离子符合Freundlich等式和Langmuir等温吸附方程。动力学研究表明，吸附同属二级反应，但本质不同；粒内扩散是吸附速度的控制阶段。测定了浓集因素、分配系数、吸附效率及pH值变化对吸附容量的影响。从扫描电镜观察论证了AuCl-4和IrCl2-6在BMAO上吸附时发生的氧化还原反应及由此表现出来的超当量吸附。
Adsorption of noble - metal compex amons such as AuCl4, liC, PdCl-and Ptcl adsorbed by cellulase - based magnetic pogly amidoxime adsorbent (BMAO) accords with Fre-undlich equation and bogrmuir adsorption isotherm. StUdie8 of adsolption kinetics show that allthe adsorptions are second - order reaction but there are essential differences between them. Theintwicle diffoion is the xate - detendning step. Concentraion factors, distribution coefficients, adsorption efficiencies and the effects of pH on adsorption capacity were measured. Observaion of SEM suggests that the redox reaction takes place during adsorption of Aucl and liclby BMA0, and brings about the super - equivalent adsorption.
出处
《纤维素科学与技术》
CAS
CSCD
1998年第2期45-56,共12页
Journal of Cellulose Science and Technology
基金
中国科学院广州化学研究所纤维素化学开放研究实验室资助
关键词
纤维素基
磁性树脂
聚偕胺肟
贵金属
吸附
cellulose-based magnetic adsorbent
polyamidoxime
noble-metal
adsorption
redox reaction
