采用共沉淀法制备Fe_3O_4磁流体,再与5A沸石复合制备一系列不同Fe_3O_4载量的磁性5A沸石,并对其进行X射线衍射、扫描电子显微镜、X射线能谱仪、振动样品磁强计等表征分析,测定了磁分离回收率及铜、锌、镉离子饱和交换吸附量.结果表明,Fe_3O_4微粒主要赋存于5A沸石粒间,磁性5A沸石具有良好的超顺磁性,铜、锌、镉离子的饱和交换吸附量随Fe_3O_4载量增加而小幅降低,但仍与5A沸石相当.Fe_3O_4载量为25%时,其饱和磁化强度、剩余磁化强度分别为13.817、0.351A·m~2/kg,磁分离回收率为98.78%,铜、锌、镉离子的饱和交换吸附量分别为77.1、70.8、135.3mg/g.
Magnetic influence of Fe_3O_4 was prepared by coprecipitation method,and then prepared magnetic 5A zeolite with different loadings of Fe_3O_4,the production were characterized by X ray diffraction,scanning electron microscopy,energy dispersive spectrometer and vibration sample magnetometer,the magnetic recovery rate and saturation exchange-adsorption capacity to copper,zinc,cadmium ion were also measured.The results show that Fe_3O_4 particles mainly occurrence between the grains of 5A zeolite,magnetic 5A zeolite show well characteristic of superparamagnetism,and the saturation exchange-adsorption capacity to copper,zinc and cadmium ion of magnetic 5A zeolite are approximate with 5A zeolite,but decrease slightly along with the loadings of Fe_3O_4 increasing.When the loadings of Fe_3O_4 is 25%,the saturation magnetic induction and remanence magnetization of magnetic 5A zeolite is 13.817,0.351A·m~2/kg,magnetic recovery rate is 98.78%,saturation ion exchange-adsorption capacity to copper,zinc,cadmium is 77.1,70.8,135.3mg/g,respectively.
参考文献
| [1] | 徐如人;庞文琴;于吉红.分子筛与多孔材料化学[M].北京:科学出版社,2004:14-15. |
| [2] | 曹吉林;闫栋梁;刘秀伍 等.4A沸石分子筛及其制备方法[P].中国:CN1868877,2006-11-29. |
| [3] | Ji-lin Cao;Xiu-Wu Liu;Rui Fu .Magnetic P zeolites: Synthesis, characterization and the behavior in potassium extraction from seawater[J].Separation and Purification Technology,2008(1):92-100. |
| [4] | 曹吉林,邢冬强,刘秀伍,谭朝阳.超声波合成磁性4A沸石分子筛[J].物理化学学报,2007(12):1893-1898. |
| [5] | 曹吉林,付睿,刘秀伍,谭朝阳.磁性4A沸石分子筛的合成与表征[J].天津大学学报,2009(02):183-188. |
| [6] | 曹吉林,闫栋梁,刘秀伍,谭朝阳.磁性4A沸石制备及其对水中氯乙酸吸附[J].离子交换与吸附,2008(05):400-407. |
| [7] | 曹吉林,付睿,刘秀伍,谭朝阳.磁性核P型沸石的合成及表征[J].无机化学学报,2007(12):2065-2071. |
| [8] | Luiz C.A. Oliveira;Diego I. Petkowicz;Alessandra Smaniotto;Sibele B.C. Pergher .Magnetic zeolites: a new adsorbent for removal of metallic contaminants from water[J].Water research: A journal of the international water association,2004(17):3699-3704. |
| [9] | Feng D.;Aldrich C. .Removal of heavy metal ions by carrier magnetic separation of adsorptive particulates[J].Hydrometallurgy,2000(3):359-368. |
| [10] | 哈斯其木格,李松波,徐爱菊,郭兴巴图.制备沸石基纳米非晶软磁材料的新方法及其磁性[J].高等学校化学学报,2003(09):1633-1636. |
| [11] | 杨万政,沈光涛,关奇.沸石基纳米非晶软磁材料的制备及其磁性[J].内蒙古大学学报（自然科学版）,2004(06):643-647. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%