【摘要】 为了研究金属离子掺杂TiO₂介孔材料吸附钩藤生物总碱的活性,以固相合成法制备的Ni-TiO₂、Zn-TiO₂、Al-TiO₂介孔材料为吸附剂,对钩藤提取液进行吸附和洗脱实验。结果表明,在常压和298K下,Ni-TiO₂介孔材料对钩藤生物总碱的吸附行为属准一级吸附,速率常数k=0.01257min-1,吸附表观活化能E_a=-1067J/mol,静态吸附容量达111.5mg/g。动态吸附容量为75.3mg/g,洗脱率为90.2%。Ni-TiO₂经3次吸附后,镍离子几乎没有流失,所制得的钩藤碱符合国家卫生标准。上述实验结果证明,Ni-TiO₂介孔材料是一种性能优良的吸附剂,能很好地从钩藤提取液中吸附分离生物总碱。更多还原

【Abstract】 Adsorption performance of total alkaloids from rhynchophylla with three kinds of metal ions doped TiO₂ mesoporous material was studied. Ni-TiO₂, Zn-TiO₂ and Al-TiO₂ mensoporous materials were prepared and used as adsorbents for adsorption and elution of extracts of Ramulus Uncariae cum Uncis（Gouteng）. The results showed that Ni-TiO₂ mesoporous material was an excellent adsorbent for rhynchophylline. The rate coefficient（k=0.01257min-1） and the apparent sorption activation energy（E_a=-1067J/mol） were obtained. The static adsorption capacity was up to 111.5mg/g, the dynamic adsorption capacity was 75.3mg/g, and elution efficiency was 90.2%. Furthermore, there was almost no loss of Ni2+ ions in Ni-TiO₂ after adsorption for three times, the rhynchophylline extracted was accorded with National Health Standard of GB 16210-1996. These results indicated that Ni-TiO₂ mesoporous materials could effectively extract total alkaloids from Ramulus Uncariae cum Uncis（Gouteng）.更多还原