新型胺化介孔炭的制备及其对pbii的吸附-北京玛格泰克科技发展.pdf

中国环境科学 2014,34(8) ：1985~1992 China Environmental Science 新型胺化介孔炭的制备及其对 Pb(II) 的吸附 李坤权 1*,杨美蓉 1,王燕锦 2,贾佳祺 1,郑 正 3 (1.南京农业大学工学院,智能化农业装备江苏省重点实验室,江 苏 南京 210031 ；2.河南农业大学,农业部农村可再生能源新材料与装备重点实验室,河南 郑州 450002 ；3.复旦大 学环境科学与工程系,上海 200433) 摘要：采用微波辅助磷酸活化制备了高中孔率蔗渣基介孔炭,并通过硝酸氧化和乙二胺聚合在其孔道内修饰了含氮多胺基团,探索了溶液 浓度、温度、吸附剂剂量等对改性介孔炭的 Pb(II)吸附性能、行为和热力学特性的影响.结果表明,蔗渣基介孔炭较宽的孔道结构可通过乙 二胺缩水聚合反应在其表面接枝酰胺、仲胺等含氮基团;胺化改性增强化了介孔炭对水溶液中 Pb(II) 的固定作用,改性后介孔炭对 Pb(II) 的 吸附量高达 180mg/g,是改性前介孔炭的 1.5 倍;改性介孔炭对 Pb(II) 的去除率显著增加,对溶液浓度60mg/L 的Pb(II)去除率接近 100%.等温 吸附与热力学数据表明,胺化改性介孔炭对 Pb(II) 的吸附位能量存在差异化,吸附是自发的吸热反应过程,温度对铅(II)离子吸附有促进作用, 化学作用在吸附过程中发挥了重要作用. 关键词：介孔炭；胺化；吸附；铅离子；乙二 中图分类号：X703 文献标识码：A 文章编号：1000-6923(2014)08-1985-08 Preparation of amine-modified mesoporous activated carbon and its adsorption of lead (II) from aqueous solution. LI 1* 1 2 1 3 Kun-quan , YANG Mei-rong , WANG Yan-jin , JIA Jia-qi , ZHENG Zheng (1.College of Engineering, Nanjing Agricultural University, Nanjing 210031, China ；2. Key Laboratory of New Materials and Facilities for Rural Renewable Energy, Ministry of Agriculture, Henan Agricultural University, Zhengzhou 450002, China ；3.Environmental Science and Engineering Department, Fudan University, Shanghai 200433, China). China Environmental Science, 2014,34(8)：1985~1992 Abstract ：Biomass-based mesoporous carbons were prepared from bagasse by microwave assisted H3PO4 activation. Polyamine groups were modified on the prepared carbon channels’ surfaces by nitric acid oxidation followed by reaction with ethylenediamine. The influence of initial concentration, temperature, carbon dose on the adsorption capacity, characteristic and thermodynamics of Pb (II) on the modified mesoporous carbon was investigated. The results showed t