文献类型：期刊文献

中文题名：希夫碱型木质素基吸附材料的制备及其对Pb^(2+)吸附性能研究

英文题名：PREPARATION OF SCHIFF BASE-MODIFIED-LIGNIN ADSORBENT AND ITS ADSORPTION PERFORMANCE OF Pb^(2+)

作者：张雪彦[1] 金灿[1] 刘贵锋[1] 吴国民[1] 霍淑平[1] 陈健[1] 孔振武[1]

第一作者：张雪彦

机构：[1]中国林业科学研究院林产化学工业研究所生物质化学利用国家工程实验室国家林业局林产化学工程重点开放性实验室江苏省生物质能源与材料重点实验室

年份：2017

卷号：33

期号：5

起止页码：403-415

中文期刊名：离子交换与吸附

外文期刊名：Ion Exchange and Adsorption

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：十二五科技支撑项目(2015BAD14B06);国家自然科学基金项目(31400516);中国林科院中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2014QB043)

语种：中文

中文关键词：木质素;Pb^(2+);希夫碱;离子吸附

外文关键词：Lignin; Schiffbase; pb^2＋; Ion adsorption.

分类号：O636.2

摘要：以乙酸木质素为原料,通过曼尼希胺化反应和希夫碱反应制备希夫碱型木质素基离子吸附材料(SLA),利用红外光谱、核磁共振氢谱和元素分析等手段对SLA的结构进行表征。考察了溶液pH值、吸附剂用量和离子溶液初始浓度等因素对SLA吸附性能的影响。结果表明,在pH=5.0、吸附剂用量2.0g/L、Pb^(2+)溶液浓度200mg/L条件下,SLA对Pb^(2+)具有较高的吸附量(65.45mg/g)和良好的吸附选择性。研究结果表明,SLA对Pb^(2+)的等温吸附过程符合Freundlich等温吸附模型,存在非均匀多层吸附现象;SLA对Pb^(2+)的吸附动力学过程符合准二级吸附动力学模型,表明SLA对Pb^(2+)的吸附作用主要为化学吸附。
Acetic acid lignin （AL） was used to prepare Schiff base-modified-lignin adsorbent （SLA） through Mannich reaction and Schiff base reaction. The structure of SLA was characterized by FT-IR, 1H NMR and EA analysis. The adsorption performance of SLA toward Pb^2＋ was examined under different conditions, such as pH, dosage and Pb^2＋ initial concentration. The maximum adsorption capacity of Pb^2＋ by SLA was found to be 65.45mg/g with high selectivity among various metal ions under the optimized condition at pH of 5.0, dosage of 2.0g/L and Pb^2＋ initial concentration of 200mg/L. The adsorption isotherms were found to be in good agreement with Freundlich model, which suggested a non-monolayer and multilayer adsorption behavior. The adsorption kinetic process could be well fitted by Pseudo-second-order kinetic model with a correlation coefficient R^2〉0.998. It reflected that the adsorption mechanism of Pb^2＋ by SLA was mainly regarded as chemical adsorption between the metal ions and Schiff base sites.