高校化学工程学报2017，Vol.31Issue(2)：470-477,8.DOI:10.3969/j.issn.1003-9015.2017.02.029
改性壳聚糖微球制备及其对阴离子染料的吸附行为研究
Preparation of Modified Chitosan Microspheres and their Anionic Dye Adsorption Behaviors
摘要
Abstract
Chitosan was prepared by alkaline N-deacetylation of squid pens β-chitin. Diethylenetriamine and epichlorohydrin modified chitosan microspheres (DECM) were synthesized via emulsion crosslinking using chitosan as monomer and diethylenetriamine and epichlorohydrin as crosslinker. The structure and properties of DECM were characterized by SEM, FT-IR, XRD and TGA, and the results show that DECM has large specific surface area and relatively more active sites. Adsorption of Congo red (CR) and Acid green 50 (AG50) onto the microspheres were studied with static adsorption, and the results show that the adsorption kinetics of two dyes follow the pseudo-second-order model. The maximal adsorption capacities calculated by Langmuir equation at pH 3.0 and 25℃ are 428.7 mg·g-1 and 691.8 mg·g-1, respectively. Freundlich model indicates that favourable adsorption mechanism can be applied for both dyes. Furthermore, anionic dyes adsorbed by the microspheres are successfully released using 0.1 mol·L-1 NaOH and the adsorption capacity remains over 92% even after 5 adsorption-desorption cycles.关键词
壳聚糖微球/表征/阴离子染料/吸附/重复利用Key words
chitosan microspheres/characterization/anionic dyes/adsorption/recycling分类
资源环境引用本文复制引用
林越呈,王宏鹏,龚金炎,杨俊兴,胡升,梅乐和,黄俊..改性壳聚糖微球制备及其对阴离子染料的吸附行为研究[J].高校化学工程学报,2017,31(2):470-477,8.基金项目
浙江省重大科技专项(2008C14067) （2008C14067）
浙江省农业生物资源生化制造协同创新中心开放基金(2016KF0020). （2016KF0020）
