按1SiO2∶ 0.35TBAOH∶ 25H2O的摩尔比,170℃水热晶化48 h得到微孔分子筛MEL,再按n(SiO2)∶ n(CTAB)∶n(H2O)∶n(NaOH)=1∶0.45∶60∶0.48的摩尔比,配成MCM-48的悬浮液,将合成的MEL加入MCM-48的溶液中,80℃水热晶化96h,制备出MEL/MCM-48微介孔复合分子筛,其结构和形貌采用XRD、TEM等手段对其进行了表征.考察了这种复合分子筛的投加量、pH值、吸附时间等因素对阳离子红X-5GN模拟染料废水吸附性能的影响.MEL/MCM-48微介孔复合分子筛的投加量为1 g/L、阳离子红X-5GN染料废水浓度为20 mg/L,溶液为中性、振荡时间为60 min,温度为50℃时吸附效果最好,脱色率以达到了97.8％,吸附动力学曲线不符合一级反应模型(Lagergren一级速率方程),但用二级反应模型(McKay二级速率方程)来描述可以得到很好的相关性.
参考文献
| [1] | D. S. Bhange;Veda Ramaswamy .Thermal expansion studies of silicalite-2 molecular sieves of MEL (ZSM-11) topology[J].Journal of porous materials,2012(3):301-305. |
| [2] | Kaldstrom, M.;Kumar, N.;Heikkila, T.;Tiitta, M.;Salmi, T.;Murzin, D. Yu. .Transformation of levoglucosan over H-MCM-22 zeolite and H-MCM-41 mesoporous molecular sieve catalysts.[J].Biomass & Bioenergy,2011(5):1967-1976. |
| [3] | loana Fechete;Ovidiu Ersen;Francois Garin .Catalytic behavior of MnMCM-48 and WMnMCM-48 ordered mesoporous catalysts in a reductive environment: a study of the conversion of methylcyclopentane[J].Catalysis science & technology,2013(2):444-453. |
| [4] | Mansoor Anbia;Nourali Mohammadi .A fast and efficient method for the removal of hexavalent chromium from aqueous solutions[J].Journal of porous materials,2011(1):13-21. |
| [5] | 杨宇川,辉永庆,何小波,钟志京.微孔-介孔复合分子筛研究进展与应用前景[J].硅酸盐通报,2006(02):86-90. |
| [6] | 成岳,潘顺龙,焦创,王晶.Fe-MEL分子筛催化剂的制备及其催化脱色[J].过程工程学报,2012(01):148-153. |
| [7] | 潘健民,成岳,魏运洋.Ce-MCM-48分子筛的合成与吸附动力学研究[J].硅酸盐通报,2012(04):920-924. |
| [8] | Viveka Alfredsson;Michael W. Anderson .Structure of MCM-48 Revealed by Transmission Electron Microscopy[J].Chemistry of Materials,1996(5):1141-1146. |
| [9] | Poladi PHRP.;Landry CC. .Synthesis, characterization, and catalytic properties of a microporous/mesoporous material, MMM-1[J].International Journal of Quantum Chemistry,2002(2):363-369. |
| [10] | 周志华 .MCM-48/ZSM-5复合分子筛及膜的制备研究[D].大连理工大学,2009. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%