化工学报2012，Vol.63Issue(1)：301-306,6.DOI:10.3969/j.issn.0438-1157.2012.01.042
生物质阴离子树脂的合成、表征及吸附性能
Preparation, characteristics and adsorption properties of anion resin prepared from biomass
摘要
Abstract
An anion exchange resin (MWS, modified wheat straw) was prepared by chemical modification of wheat straw grafting epichlorohydrin, triethylamine and diethylenetriamine to improve MWS performance, particularly for adsorption of NO7 in water. The results showed that amine groups with positive-charge had been introduced into the structure of MWS, which resulted in improving significantly adsorption capacity for NO3- in water. The analysis of zeta potential and surface elemental as well as FTIR and Raman spectra indicated that the adsorption mechanism of MWS for NO3- was ion exchange. The adsorption data could be well fitted with the Langmuir model and the correlation coefficient (R2) was higher than 0. 988. The results of competition adsorption indicated that the adsorption efficiency for co-present ions followed an order as SO42-＞H2PO4-＞NO3-＞NO2-. The maximum adsorption capacity (Qmax) of MWS for NO3- was 52. 1 mg·g-1, which could compared with that of commercial resin, and showed that there was a significant increase than that of raw WS (1. 3 mg·g-1). In addition, column adsorption test showed that the breakthrough adsorption capacity for NO3- was about 45. 2 mg· g-1, and both 0. 1 mol·L-1 NaCl and HCl solutions could be used as regenerating agent for the desorption of NO3- from the MWS.关键词
麦草秸秆/硝酸根/吸附/最大吸附量/拉曼光谱Key words
wheat straw/nitrate/adsorption/maximum adsorption capacity/Raman spectrum分类
资源环境引用本文复制引用
高悦,许醒,高宝玉,岳钦艳..生物质阴离子树脂的合成、表征及吸附性能[J].化工学报,2012,63(1):301-306,6.基金项目
国家自然科学基金项目(50878121). （50878121）
