【摘要】 沙柳木粉（SPP）经醚化反应制备成羧甲基沙柳木粉（CMS）。将CMS溶解到1-丙烯基-3-甲基咪唑氯盐（[AMIM] Cl）和二甲基亚砜（DMSO）中,采用聚乙烯醇（PVA）为成膜剂,制备羧甲基沙柳木粉膜（CMSM）。探究在不同吸附条件下CMSM对Cd²⁺的吸附性能。采用FTIR、SEM、XRD和XPS对CMSM进行表征。吸附结果表明:Cd²⁺初始浓度为800 mg·L^-1,pH值为5,吸附时间105 min,吸附温度35℃时,CMSM对Cd²⁺的吸附效果最佳。表征结果表明:O-H、-COOH、-C-O-C-、-CH₂、-NH₂基团参与吸附Cd²⁺的反应。CMSM表面比较疏松,有孔隙,成狭缝型。CMSM晶体内部变得蓬松,Cd²⁺更容易被CMSM吸附。CMSM对Cd²⁺的吸附属于多分子层吸附,同时存在化学吸附和物理吸附,且以化学吸附为主,准二级动力学模型和Freundlich等温线模型与其吸附过程相符合。更多还原

【Abstract】 Carboxymethyl Salix powder（CMS） was prepared by etherification of Salix powder（SPP）.CMS was dissolved in 1-propenyl-3-methylimidazolium chloride（[AMIM] Cl） and dimethyl sulfoxide（DMSO）,and carboxymethyl salix powder membrane（CMSM） was prepared by using polyvinyl alcohol（PVA） as film-forming agent.The adsorption properties of CMSM for Cd²⁺ under different adsorption conditions were investigated.CMSM was characterized by FTIR,SEM,XRD and XPS.The adsorption results showed that the adsorption effect of CMSM on Cd²⁺ was the best when the initial concentration of Cd²⁺ was 800 mg·L^-1,the pH value was 5,the adsorption time was 105 min,and the adsorption temperature was 35 ℃.The characterization results showed that OH,-COOH,-C-O-C-,-CH₂,-NH₂ groups are involved in the adsorption of Cd²⁺.The surface of CMSM is relatively loose,with pores and slits.The interior of CMSM crystal becomes fluffy,and Cd²⁺ is more easily adsorbed by CMSM.The adsorption of Cd²⁺ by CMSM belongs to multi-molecular layer adsorption,and there are chemical adsorption and physical adsorption at the same time,and it is mainly chemical adsorption.The pseudo-second-order kinetic model and Freundlich isotherm model are consistent with its adsorption process.更多还原