摘要
通过甲醛将菜籽多酚固定在壳聚糖微球,制成壳聚糖固化菜籽多酚微球,研究其对水中Pb、Cd、Hg离子的吸附效果。该微球对Pb、Cd、Hg的最大吸附量分别为88.50、117.15、147.25 mg/g。其吸附行为符合Freundlich等温吸附方程。壳聚糖固化菜籽多酚微球对Pb、Cd、Hg的吸附动力学可以用拟二级速率方程来描述。使用4种解吸剂分别对3种离子进行解吸试验,发现硝酸对3种离子的解吸效果较好,该吸附剂可重复使用。
Polyphenols have been immobilized on chitosan microspheres by formaldehyde in the paper. The adsorption effects of Pb, Cd and Hg ions on polyphenol immobilized chitosan microspheres have been studied as well. The maximum adsorption capacities of Pb, Cd and Hg on the microspheres were 88.50, 117.15, 147.25 mg/g respectively. The adsorption performance was corresponded with Freundlich isotherm equation. The adsorption kinetics of Pb, Cd and Hg on polyphenol immobilized chitosan microspheres could be expressed by pseudo - second - rate equation. Four categories of desorbent were successively used in ion desorption experiments, and the results showed that the nitrate was the best for desorption of three ions. Further, the adsorbent was available to be reused.
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2015年第9期98-102,共5页
Journal of the Chinese Cereals and Oils Association
关键词
壳聚糖
菜籽多酚
微球
重金属离子
吸附
chitosan, rapeseed polyphenol, microsphere, heavy metal ions, adsorption
