工程科学学报2017，Vol.39Issue(10)：1518-1524,7.DOI:10.13374/j.issn2095-9389.2017.10.009;
季铵型木质素的合成及其对AuCl4-的吸附性能
Synthesis of quaternary ammonium lignin and its adsorption properties on AuCl-4
摘要
Abstract
Quaternary ammonium lignin was synthesized from rice straw after phenolization, crosslinking and amination. Its ad-sorption properties for AuCl -4 were investigated. The adsorbent was characterized by Fourier transform infrared spectroscopy (FT- IR), scanning electron microscope (SEM), thermogravimetric analysis and differential scanning calorimetry (TG- DSC). The effects of ini-tial concentration of AuCl -4 , concentration of hydrochloric acid and adsorption time on the effect of adsorption for AuCl -4 were dis-cussed. The results show that the quaternary ammonium lignin has excellent thermal stability and its surface is irregularly rough and porous. The maximum adsorption capacity is 3. 27 mol·kg - 1 when the concentration of hydrochloric acid is 0. 5 mol·L - 1 , the initial concentration of AuCl -4 is 6. 0 mmol·L - 1 and the adsorption time is 100 h. The equilibrium time of adsorption for AuCl -4 is 360 min when the concentration of AuCl -4 is 1 mmol·L - 1 , the concentration of hydrochloric acid is 0. 5 mol·L - 1 . Moreover, AuCl -4 was re-duced to elemental gold by the phenolic hydroxyl group of the quaternary ammonium lignin through the analyses of XRD, SEM and FT- IR.关键词
稻草/季铵型木质素/合成/AuCl-4/吸附性能Key words
rice straw/quaternary ammonium lignin/synthesis/AuCl -4/adsorption properties分类
化学化工引用本文复制引用
张保平,杨芳,马钟琛,郭美辰,刘运..季铵型木质素的合成及其对AuCl4-的吸附性能[J].工程科学学报,2017,39(10):1518-1524,7.基金项目
教育部第 47 批留学回国人员科研启动基金资助项目(FMRU201203) （FMRU201203）
