摘要
为更好地利用木质素,本研究将木质素纤维化处理并用于吸附含Cr^(6+)的废水。考察了木质素纤维投入量、吸附时间和不同初始Cr^(6+)浓度对吸附效果的影响,并结合孔隙结构与表面化学结构分析了影响原因。结果表明:(1)木质素纤维在不同吸附剂投入量、吸附时间和吸附溶液初始浓度条件下对Cr^(6+)的吸附性能均优于相同条件下木质素粉末对Cr^(6+)的吸附性能;(2)木质素粉末纺丝成木质素纤维后,虽然总孔容变化不大,但明显增加了木质素的总比表面积,这为木质素吸附Cr^(6+)时提供了更多的接触位点;(3)木质素主要官能团在纺丝前后变化不大,但木质素表面羟基的相对含量在纺丝后增加较多,并与Cr^(6+)结合,从而提高了木质素纤维的吸附性能。
To better utilize lignin,lignin-based fiber was prepared and used to absorb Cr^6+ in waste water.The effect of different lignin-based fiber quantity used,adsorption time,and different initial Cr^6+ concentrations on the adsorption effects were characterized,with the causes analyzed based on the pore structure and surface chemical structure,the resulting showing:①Lignin-based fiber had better adsorption property than that of lignin powder under the conditions of different quantity of lignin-based fibers,adsorption time and different initial Cr^6+ concentration;②Total higher specific surface area of lignin-based fibers was obtained while total pore volume was almost the same,which provided more contacting position points for Cr^6+ adsorption after lignin powder was made into lignin fiber by means of spinning;content of the main hydroxyl groups which could be combined with Cr^6+ increased after spinning,improving the;③The main functional groups of lignin did not change much before and after spinning,but the relative content of hydroxyl groups on the surface of lignin increased more after spinning and combination with Cr^6+,thus improving the adsorption performance of lignin fiber
作者
田彪
陈思危
宋玮晔
刘静宜
林剑
TIAN Biao;CHEN Si-wei;SONG Wei-hua;LIU Jing-yi;LIN Jian(Beijing Key Laboratory of Wood Science and Engineering,Beijing Forestry University,Beijing 100083,China)
出处
《林业机械与木工设备》
2019年第2期21-25,共5页
Forestry Machinery & Woodworking Equipment
基金
北京林业大学"国家级大学生创新创业训练计划"项目(201710022031)
