采用十六烷基三甲基溴化铵和壳聚糖季铵盐协同对钠基膨润土进行改性,制备了一种新型的吸附剂。研究了改性膨润土吸附苯胺的机理及其主要影响因素。实验结果表明,改性膨润土对苯胺的吸附几乎不受吸附温度和溶液酸碱性影响;并在较短的时间内到达吸附平衡。外加无机盐可促进改性土对苯胺的吸附,吸附过程遵循准二阶动力学模型。改性土适合处理高浓度苯胺溶液。当苯胺质量浓度为3 000mg/L时,其吸附容量达29.7mg/g。改性土对苯胺的吸附符合Freundlich等温吸附模式,吸附机制主要是分配作用。
A novel absorbent was prepared using Na-bentonite modified with cetyltrimethyl ammonium bromide and quaternized chitosan.The adsorption mechanism of the modified bentonite for aniline was studied,and the major factors affecting the adsorption of aniline onto the modified bentonite were investigated.The results shown the contacting temperature and pH value of the solution have no influence on the adsorption of aniline onto the modified bentonite.The adsorption equilibrium is attained in a short time.The foreign salts may improve the adsorption of aniline onto the modified bentonite.The adsorption process fits the pseudo-second-order kinetic well.The modified bentonite is suitable for the treatment of aniline solution with a high concentration.The adsorption capacity is 29.7 mg/g at pH 7.0 and 20℃ when the concentration of aniline solution is 3000 mg/L.The adsorption isotherm is accorded with the Freundlish isotherm.The main adsorption mechanism is partitioning effect.
参考文献
| [1] | A.Safa Ozcan;Bilge Erdem;Adnan Ozcan .Adsorption of Acid Blue 193 from aqueous solutions onto BTMA-bentonite[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2005,266:73-81. |
| [2] | Ming Kuang Wang;Chun Han Ko;Chihhao Fan et al.p-Nitrophenol,phenol and aniline sorption by organo-elays[J].Journal of Hazardous Materials,2007,149:275-282. |
| [3] | 李静,岳钦艳,李倩,高宝玉,原爱娟.阳离子聚合物/膨润土对苯酚的吸附及其机理研究[J].山东大学学报（理学版）,2008(09):31-35,50. |
| [4] | 朱利中;张淳;周立峰 等.有机胺膨润土吸附苯酚的性能及在水处理中的应用初探[J].中国环境科学,1994,14(05):346-349. |
| [5] | 朱利中,陈宝梁,罗瑜.有机膨润土吸附水中多环芳烃的性能及机理研究[J].环境科学学报,2000(01):21-26. |
| [6] | 舒月红,贾晓珊.CTMAB-膨润土从水中吸附氯苯类化合物的机理--吸附动力学与热力学[J].环境科学学报,2005(11):1530-1536. |
| [7] | 张亚静,朱瑞芬,童兴龙.壳聚糖季铵盐对味精废水絮凝作用[J].水处理技术,2001(05):281-283. |
| [8] | 冯玉杰,金永新,孙晓君,蔡伟民,岳国军.壳聚糖季铵盐处理玉米酒精清糟液的研究[J].环境污染与防治,2002(03):129-131. |
| [9] | 张亚静,朱瑞芬,李颖.壳聚糖季铵盐对造纸废水絮凝效果研究[J].宁波高等专科学校学报,2001(02):42-45. |
| [10] | Huang, R.;Zheng, D.;Yang, B.;Wang, B.;Zhang, Z. .Preparation and characterization of CTAB-HACC bentonite and its ability to adsorb phenol from aqueous solution[J].Water Science and Technology,2011(1):286-292. |
| [11] | Huang Ruihua;Chen Guohua;Sun Mingkun et al.Studies on nanofiltration membrane formed by diisocyanate crosslinkingof quaternized chitosan on poly(aerylonltrile)(PAN)support[J].Journal of Membrane Science,2006,286(1,2):237-244. |
| [12] | 何雪寒,王菲菲,潘方珍.有机蒙脱石处理苯胺废水实验研究[J].中国非金属矿工业导刊,2008(06):49-51,57. |
| [13] | 陈志勇.有机膨润土制备及其对苯胺的吸附性研究[J].矿产综合利用,2004(01):19-22. |
| [14] | 杨性坤,白玉萍,张钰.有机蒙脱土的制备及对苯胺废液的吸附性能[J].信阳师范学院学报（自然科学版）,2010(03):430-433. |
| [15] | 任广军,翟玉春,宋恩军,张春丽,王昕.柱撑膨润土对染料酸性红B的吸附行为[J].非金属矿,2004(02):46-48. |
| [16] | 邵丹,王昕,任广军.柱撑膨润土吸附水中苯胺的性能研究[J].当代化工,2007(03):279-281. |
| [17] | 陈宝梁,朱利中.阴-阳离子有机膨润土吸附水中对硝基苯酚的性能及机理研究[J].浙江大学学报(理学版),2002(03):317-323. |
| [18] | 陈明明,王郑,缪伟,王琪,周祺,沈涛,陈泽恩.凹凸棒复合吸附剂对苯酚的吸附研究[J].化工技术与开发,2009(08):35-38. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%