中国造纸学报2011，Vol.26Issue(2)：53-57,5.
改性木质素胺吸附剂对废水中Pb2+的吸附
Adsorption of Lead Ions in Effluent onto Lignin Amines Adsorbents from Modified Kraft Lignin
摘要
Abstract
Lignin amine adsorbents were synthesized from kraft lignin, diethylenetriamine and formaldehyde via Mannich reaction. The effect of different conditions on the adsorption of Pb2+ was investigated. The results showed that the lignin amine with n( lignin):n(diethylenetri-amine):n (formaldehyde) = 1:1.5:4.5 had the best adsorbing efficiency among three different lignin absorbents. The optimum adsorption conditions were as follows; adsorption temperature was 45℃ , the amount of adsorbents was 1.2 g/L, pH was 5.0 and the adsorption time was 24 hours. Under these conditions the removal of Pb2+ reached 59. 82% , the adsorption capacity was 49. 85 mg/g. This adsorption process was chronic adsorption, the dynamic model was consistent with McKay secondary adsorption kinetics. The adsorption of Pb2 + on lignin amine was affected by the intraparticle diffusion and liquid film diffusion, and the intraparticle diffusion was the main rate-controlling step.关键词
木质素/木质素胺/吸附/Pb2+Key words
lignin/ lignin amine/ adsorption/ Pb2+分类
化学化工引用本文复制引用
刘祖广,吕施贤,闫晓雪,张太顺,曾薇..改性木质素胺吸附剂对废水中Pb2+的吸附[J].中国造纸学报,2011,26(2):53-57,5.基金项目
本课题得到教育部科学技术研究重点项目(210165)及广西教育厅科研项目(200911MS69)的资助。 （210165）
