水溶液中的活性翠兰KN-G在一种新型球形木质素吸附剂上吸附特性研究(英文)  

Adsorption Behavior of Reactive Turquoise Blue KN-G in Aqueous Solutions on a Novel Spherical Lignin-based Adsorbent

作　　者：刘明华[1] 洪树楠[1] 黄建辉[1] 叶庆[1] 刘千钧[2] 

机构地区：[1]福州大学环境与资源学院,福建福州350002 [2]广东工业大学环境科学与工程学院,广东广州510090

出　　处：《中山大学学报（自然科学版）》2005年第A02期1-6,共6页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(50203003);福建省青年科技创新基金资助项目(2002J002);福建教育厅基金资助项目(JA03012);福州大学科技发展基金资助项目(2003_XQ_28)

摘　　要：以马尾松浆厂提供的碱木素为原料研制出一种新型的球形木质素吸附剂SLBA。然后以活性翠兰KN-G为吸附质研究其在这种含有季铵基团的球形木质素吸附剂上的吸附特性。并进行吸附影响因素的优选实验。实验结果表明：活性翠兰KN-G在吸附剂上的吸附效果取决于吸附质溶液的pH值和吸附质的初始浓度。初始浓度的增大有利于提高平衡吸附容量。在3～8的pH范围内，去除率从12．3％迅速升至98．6％，当溶液的pH值为10．0时，去除率达100％。吸附过程符合Langmuir吸附等温式，即Ce/qe=0．0002136＋0．001225Ce。而且，平衡常数的无量纲系数RL为8．711×10^-4，远小于0．1，说明活性翠兰KN-G在SLBA上的吸附很容易进行。而且，SLBA吸附剂的饱和吸附容量为816．3mg／g，总的穿透容量为761mg／g，吸附效果明显优于活性炭。吸附在SLBA吸附剂上的活性翠兰可用乙醇、双氰胺-甲醛缩聚物和盐酸混合物解析，解析率可达98．7％。A novel spherical lignin-based adsorbent, denoted as SLBA, was prepared using alkali lignin as a raw material which was provided by a mascon pine pulp mill in Fujian, China. Then an investigation was conducted regarding the adsorption behavior of a reactive dye （Turquoise Blue KN-G） from aqueous solutions with the above new spherical lignin-based adsorbent containing the quaternary anunonium cationic group. Moreover, various affecting factors on the adsorption were optimized. It was found that the adsorption of reactive Turquoise Blue KN-G on the adsorbent was found to be initially pH and concentration dependent. The concentration helped to increase the equilibrium adsorption capacity. With an increase in solution pH ranging from 3 to 8, the removal percentage increased sharply from 12.3 % to 98.6 %, and at pH = 10, the removal rate reached 100%. The adsorption process followed the Langmuir adsorption isotherm, i.e., Ce/qe = 0.0002136 ＋ 0.001225 Ce . Moreover, RL, a dimensionless separation factor of an equilibrium parameter, was 8. 711×10^-4, which was far less than 0.1 indicating the favorable adsorption. The saturated adsorption capacity was 816.3 mg/g, and the total breakthrough removal capacity was 761 mg/g, which prevailed over the commercial activated carbens evidently. The reactive Turquoise Blue KN-G adsorbed on SLBA could be recovered with a mixture of alcohol, dicyandiamide-formaldehyde polycondensate and HCl aqueous solutions. And, the maximum desorption efficiency could reach 98.7%.

关 键 词：木质素 球形吸附剂 吸附 活性染料 Langmuir吸附等温式 

分 类 号：O636.2[理学—高分子化学] O647.3[理学—化学]