A Mannich base biosorbent derived from alkaline lignin for lead removal from aqueous solution
A Mannich base biosorbent derived from alkaline lignin for lead removal from aqueous solution
复制标题
源自碱性木质素的曼尼希碱生物吸附剂，用于从水溶液中去除铅
DOI：
10.1016/j.jiec.2014.08.021
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发表时间：
2015-03-25
影响因子：
6.1
通讯作者：
Li, Zhili
中科院分区：
文献类型：
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作者：
Ge, Yuanyuan;Song, Quanpeng;Li, Zhili
将碱木素(AL)与甲胺和甲醛进行接枝，制得Mannich碱生物吸附剂(AML)。考察了投加量、反应时间、pH和反应温度对AML含氮量的影响。Mannich碱的含氮量最高可达8.32%。用扫描电子显微镜(SEM)、元素分析和凝胶渗透色谱(GPC)对其进行了表征。动力学吸附表明AML对Pb2+具有快速吸附作用。并遵循二阶模型。吸附平衡结果表明，AML对Pb2+的最大吸收率为60.5 mg/g，是AL的4.2倍。AML在废水净化方面具有很好的潜力。(C)2014年韩国工业和工程化学学会。爱思唯尔出版，版权所有。
A Mannich base biosorbent (AML) was prepared by grafting alkaline lignin (AL) with methylamine and formaldehyde. The effects of dosages, reaction time, pH and temperature of reaction on the nitrogen content of AML were investigated. A maximum nitrogen content of the Mannich base could reach to 8.32%. It was characterized by scanning electron microscopy (SEM), element analysis, and gel permeation chromatography (GPC). Kineticadsorption suggested AML possessed fast adsorption for Pb2+. and followed a second-order model. Adsorption equilibrium results indicated AML had a maximum uptake of 60.5 mg/g for Pb2+ which was 4.2-fold higher than AL. The AML has good potential for cleanup of wastewater. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.