利用环己烷/正己醇、壳聚糖、Fe2＋/Fe3＋盐和Triton X-100组成的W/O微乳体系中加NaOH溶液沉淀剂,原位制备磁性壳聚糖纳米粒子,并经乙二胺改性（EMCN）,用于吸附酸性橙12（AO12）和酸性橙10（AO10）。利用透射电镜、X-射线衍射、红外等对产物进行了表征。结果表明,EMCN分散良好,粒径15 nm~40 nm,饱和磁化强度25.6 emu/g。AO12和AO10最佳pH值分别为4.0和3.0;吸附速率很快,平衡时间40 min~60 min。吸附平衡用Langmuir模型拟合最好,饱和吸附容量分别为AO12 2.81 mmol/g,AO10 1.82 mmol/g。由D-R模型计算E值（14.95 kJ/mol~18.54 kJ/mol）表明以化学吸附为主。EMCN可用NH4OH/NH4Cl（pH10.0）溶液再生。
The magnetic chitosan nanoparticles（MCN） were in-situ prepared by adding the NaOH solution precipitant into a W/O microemulsion system containing cyclehexane/n-hexanol,chitosan,Fe2＋/Fe3＋ salts and Triton X-100.The MCN were then modified with ethylenediamine（EMCN） and used for the adsorption of Acid Orange 12（AO12） and Acid Orange 10（AO10）.The adsorbents were characterized by TEM,XRD and FT-IR.The results show that EMCN are monodispersed,and have a particle size of 15 nm～40 nm and a saturation magnetization of 25.6 emu/g.The maximum adsorption occurred at pH 4.0 for AO12 and pH 3.0 for AO10,respectively.The adsorption was very quick with the equilibrium time of 40 min～60 min.The equilibrium data fitted well with Langmuir isotherm,and the saturation adsorption capacity was 2.81 mmol/g for AO12 and 1.82 mmol/g for AO10,respectively.The E values（14.95 kJ/mol～18.54 kJ/mol） calculated form D-R isotherm indicated that the chemisorption was predominant on the adsorption.The EMCN could be regenerated using NH4OH/NH4Cl solution（pH 10.0） as elution.
参考文献
| [1] | A.J.Varma;S.V.Deshpande;J.F.Kennedy .Meta complexation by chitosan and its deriatives:a review[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2004(1):77-93. |
| [2] | A. Kamari;W.S. Wan Ngah;M.Y. Chong .Sorption of acid dyes onto GLA and H2SO4 cross-linked chitosan beads[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2009(3):1180-1189. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%