球形二乙醇胺基木质素的合成及其对Cu^(2+)的吸附性能  

The Synthesis of Spherical Diethanolamine Based Lignin and Its Adsorption Character of Cu^(2+)

作　　者：卑莹[1] 艾青[1] 任世学[1] 方桂珍[1] 

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,黑龙江哈尔滨150040

出　　处：《生物质化学工程》2012年第4期27-31,共5页Biomass Chemical Engineering

基　　金：国家林业局公益性行业专项(200904072);国家自然科学基金资助项目(30901135)

摘　　要：以碱木质素为原料合成二乙醇胺基木质素(DLNS),再以反向悬浮技术将其制成微球形态的二乙醇胺基木质素,通过红外光谱、扫描电镜对其进行了表征,通过物理吸附仪测定产物的比表面积,然后在重金属离子污染物模拟水样中测定了其对Cu2+的吸附性能。实验结果表明:红外分析证明木质素分子已经引入二乙醇胺,凯氏定氮法测定产物的含氮量为1.66%,进一步证实二乙醇胺基木质素已经合成;产物对Cu2+的吸附在开始的0.5 h内,吸附容量增长很快,至6 h后到达平衡;吸附容量随温度的升高而增大;当球形二乙醇胺基木质素吸附剂为4 g/L时,每克吸附剂的吸附容量最大为24.12 mg,相同条件下碱木质素对Cu2+的吸附容量为每克5.84 mg,二乙醇胺基木质素对铜离子的吸附容量为每克10.71 mg,改性后的球形二乙醇胺基木质素吸附性能有较大改善。In this paper, the spherical diethanolamine based lignin was prepared by inverse suspension polymerization technique using alkaline lignin and diethanolamine as raw materials. The products were characterized by FTIR and SEM, the specific surface area and pore structure were analysed by H2-TPD, and its adsorbility of copper ions were determined in the simulation environment which contain heavy metal. The analysis of FFIR confirmed the introduction of diethanolamine into the lignin molecular, and its N content is 1.66%. From the kinetic curve, it can be seen that in the beginning half hours, the adsorption capacity grows rapidly, then it gets the balance in six hours, the adsorption capacity increased with temperature increase. The adsorption capacity achieves maximum as 24. 12 mg/g when adsorbent is 4 g/L. The adsorption capacity was enhanced greatly compared with alkaline lignin and diethanolamine based lignin, which adsorption capacity was 5.84 mg/g and 10.71 mg/g respectively.

关 键 词：球形二乙醇胺基木质素 合成 反向悬浮技术 Cu2+吸附 

分 类 号：X832[环境科学与工程—环境工程]