摘要
利用稻壳中丰富的氧化硅为硅源,以Al(OH)3为外加铝源,采用水热法合成P型分子筛。通过实验得到制备P型分子筛的最佳条件:硅铝摩尔比(SiO2/Al2O3)为5.6,钠硅摩尔比(Na2O/SiO2)为1.43,水钠摩尔比(H2O/Na2O)为18.3,反应温度为85℃,反应时间为24 h。X射线衍射(XRD)与扫描电镜分析表明,该条件下合成的P型分子筛具有较高的结晶度,无杂相,其Ca2+(以CaCO3计)交换容量可达320 mg/g。该方法为农业副产物的再利用提供了一条有效途径。
P-type zeolite was hydrothermal synthesized with rice husk as silicon source and Al（OH）3 as Al source.Results showed that the optimum composition for synthesis of P-type zeolite was SiO2/Al2O3 molar ratio of 5.6,Na2O/SiO2 molar ratio of 1.43,and H2O/Na2O molar ratio of 18.3,which could give maximum calcium ionic exchange capacity of P-type zeolite for 320 mg/g（equivalent to CaCO3） when the crystallization temperature was 85 ℃ and reacted for 24 h.Analysis of XRD and SEM indicated that the P zeolite synthesized under optimum condition had pure form,single phase and high crystalline,it could be used as wash auxiliary.The method provided an effective way for the reuse of agricultural by-products.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2011年第6期23-25,35,共4页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.20901012)
辽宁省教育厅科学技术研究资助项目(No.05L074
No.05L081)
关键词
稻壳
P型分子筛
水热法
rice husk
P-type zeolite
hydrothermal synthesis
