| 斜发沸石的合成研究 | |
| Synthesis of Clinoptilolite | |
| 摘要: 采用水热法，分别在物质量的比为2.1Na2O∶10SiO2∶Al2O3∶110.1H2O和1.05K2O∶1.05Na2O:12SiO2∶Al2O3∶250H2O的条件下合成出较高纯度斜发沸石，研究了斜发沸石合成的各种影响因素。结果表明，在140、160和180 ℃条件下均能合成出斜发沸石，且提高温度可以缩短斜发沸石的晶化时间；反应混合物的硅铝物质量的比应控制在10～12之间；碱度的降低会导致晶化时间延长，过高的碱度则导致晶种溶解；反应混合物中K+的存在利于斜发沸石的晶化。合成斜发沸石对海水中K+饱和吸附量达 38.60 mg·g-1以上，其吸附性能显著优于文献报导的天然斜发沸石。 | |
| 关键词: 斜发沸石 合成 结晶度 | |
| 基金项目: | |
| Abstract: High purity clinoptilolite was synthesized by hydrothermal method with the molar ratio of 2.1Na2O∶10SiO2∶Al2O3∶110.1H2O and 1.05K2O∶1.05Na2O∶12SiO2∶Al2O3∶250H2O. The effect of various factors on the synthesis was studied. The results show that the clinoptilolite can be obtained at 140, 160 and 180 ℃ respectively, and the crystallization period decreases with the increase of temperature. The optimized ratio of SiO2/Al2O3 is found to be 10～12. The crystallization period increases with the decrease in the content of alkali, but the crystal seeds will be dissolved in the system with too high alkali content. The K+ in the reaction system is favorable to the crystallization process of clinoptilolite. The adsorption capability of the synthesized cinoptilolite to K+ in the seawater is up to 38.60 mg·g-1, which is remarkably higher than that of the natural clinoptilolite reported in references. | |
| Keywords: clinoptilolite synthesis crystallinity | |
| 摘要点击次数: 1202 | |
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| 袁俊生,石林,韩惠茹,纪志永.斜发沸石的合成研究[J].无机化学学报,2007,23(6):994-998. | |
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