轻工学报2018，Vol.33Issue(6)：8-18,11.DOI:10.3969/j.issn.2096-1553.2018.06.002
交联壳聚糖微球的制备及其对水中芳香族羧基化合物的吸附性能研究
Research on preparation of crosslinked chitosan microspheres and its adsorption properties for aromatic carboxyl compounds in water
摘要
Abstract
Using chitosan as raw material, liquid paraffin as dispersant, formaldehyde as pre-crosslinking agent and epichlorohydrin as crosslinking agent, crosslinked chitosan microspheres were prepared by reversed-phase suspension method. The adsorption properties of crosslinked chitosan microspheres on aromatics carboxy compounds in water were studied. The results showed that it had fast adsorption rate and large adsorption capacity, the saturated adsorption capacity of crosslinked chitosan microspheres for 2-hydroxy-3-naphthoic acid, α-naphthoic acid and benzoic acid were 702. 0 mg·g-1, 320. 1 mg·g-1, 176. 3 mg·g-1at the p H value of 3. 5and 288 K, respectively. The adsorption process conformed to the Lagergren-second-order kinetic equation, and the adsorption isotherm model conformed to the Langmuir isotherm adsorption equation, which was mainly monolayer adsorption. The adsorption process was a spontaneous, exothermic and entropic reduction process with physical adsorption and chemical action. The crosslinked chitosan microspheres had good recycling ability. After 8 cycles of regeneration, the adsorption capacity could still be stabilized above 97％.关键词
交联壳聚糖微球/芳香族羧基化合物/反相悬浮法/吸附性能Key words
crosslinked chitosan microsphere/aromatic carboxyl compounds/reversed-phase suspension method/adsorption property分类
资源环境引用本文复制引用
黄浦,施文健,潘旻旻,彭阳,闻海峰..交联壳聚糖微球的制备及其对水中芳香族羧基化合物的吸附性能研究[J].轻工学报,2018,33(6):8-18,11.基金项目
国家自然科学基金项目(51208299) （51208299）
