共查询到17条相似文献，搜索用时 312 毫秒
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利用离子交换方法可以制备出K-型、Na-型和Ca-型斜发沸石。斜发沸石所含的阳离子类型不同,其物理化学性能有明显的差异。本文就不同类型的阳离子对斜发沸石的某些物理化学性能的影响进行了研究。 相似文献
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中国科学院地质研究所矿物组 《地质科学》1977,12(3):284-288
斜发沸石是天然沸石中较常见和具有实际应用价值的一种。其化学分子式为:Ca（Na·K）4Al6Si30O72·24H2O。关于斜发沸石的吸附、阳离子交换等性能,国外已有很多研究,并已将天然的斜发沸石、丝光沸石应用于从空气中富集氧、石油化工、原子能放射性废水和工业污水的处理、干燥剂,土壤改良剂、造纸充填剂等许多方面。 相似文献
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天然沸石是岩石圈上部分布最广的硅酸盐矿物之一,它普遍地见于各种火山岩和火山-沉积岩中。沸石不仅在岩浆期后热液阶段生成,而且在沉积-成岩作用阶段、表生作用(风化)阶段、低级变质阶段都可以生成。由于沸石对周围的物理化学条件和热、动力变质作用反应灵敏,因此,它是了解地质体形成时的地质环境及其变化的良好的指示矿物。本文概述了我国东部中生代火山岩中沸石岩的分布、时代、产出的地层岩性剖面、原岩类型、矿物组合及其生成顺序,并探讨了它的形成条件和成因类型,其中主要涉及具有工业意义的斜发沸石岩和丝光沸石岩。 相似文献
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浙江缙云中生代火山岩丝光沸石矿物学特征及其成因浅析 总被引：5，自引：0，他引：5
运用X射线衍射、红外吸收光谱、差热-热重分析、扫描电镜形貌研究及微区化学成分分析等手段,研究了浙江省缙云县产于球泡流纹岩球泡腔体内和产于角砾凝灰岩、凝灰熔岩型沸石矿体内的丝光沸石的矿物学特征及其成因机制。研究表明,球泡腔体内的丝光沸石与矿体内丝光沸石的矿物学特征存在明显差别:前者仅与石英紧密共生,而后者则与斜发沸石、石英以及蒙脱石等紧密共生;前者12元环通道半径收缩,而后者则8元环通道半径收缩。同时,前者具有更高的K2O/CaO、SiO2/Al2O3以及K2O/Na2O比值,而后者则阳离子电价过剩程度更高。研究认为,球泡内丝光沸石是球泡捕获的火山热液结晶产物,而矿体内丝光沸石是火山岩成岩期间隙溶液活动产物。 相似文献
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淡红沸石(Stellerite)是辉沸石族矿物之一种,曾在白令海峡中的苏联铜岛、美国阿拉斯加的朱诺、芬兰和苏联东外贝加尔的一些多金属矿床发现过。前人对淡红沸石着重进行了结晶学和热分析的研究,而对其地质产状和成因以及与有关矿化的关系相对少一些。到目前为止,我国还沒有对淡红沸石进行过报导。 相似文献
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综合应用显微观测、化学分析和物化检测手段，对黑龙江省穆棱沸石矿床沸石岩进行了系统研究，确定其矿物组成主要为斜发沸石和丝光沸石，二可单独产出，也可形成混合型矿石。该矿石在成分上属高硅型沸石，SiO2／Al2O3比值均大于8，有富元素As、Pb等较低。物化性能测试表明，穆棱沸石矿为高品级沸石矿，矿石平均热失重值达12．8％，NH4^ 交换容量为146．10meq/100g^,K^ 交换容量平均9．58mmol/100g，丝光沸石热稳定性可稳定至800℃-900℃，具有良好的开发应用前景。 相似文献
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中国科学院地质研究所矿物组 《地质科学》1977,12(3):275-283
沸石是一种含水的碱和碱土金属的骨架状铝硅酸盐。由于沸石具有分子筛的作用,在应用中通常又将沸石称为分子筛。沸石作为催化剂、干燥剂、吸附剂和离子交换剂广泛地应用于工农业各个方面。天然沸石作为一种新型的矿物资源越来越为人们所重视。 相似文献
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为了探讨有关天然沸石降低水溶液中氟含量方面实际应用的可能性及其机理,笔者自1979年春到1982年冬断断续续开展了些试验。实验中也用雪硅钙石(建筑上加气砖废料)对笔者的观点作了进一步验证。 相似文献
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Daniel B. Hawkins 《Contributions to Mineralogy and Petrology》1974,45(1):27-36
Cluster analysis showed that at least five compositional subgroups exist within the heulandite family of zeolites. The two extreme members of these five groups are the traditional heulandites and clinoptilolites. At a coarser level of clustering, two subgroups, clinoptilolite and heulandite, are evident. As shown by discriminant analysis, the most important compositional variable distinguishing all these groups is calcium. From principal components analysis, it was found that the c cell dimensions of the heulandite family of zeolites varies directly with aluminum and inversely with silicon. The a cell dimension and the β angle seem to vary inversely with the iron content. The b cell dimension may vary inversely with iron and aluminum and directly with silicon. 相似文献
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The paper deals with results of general and systematic analysis of data from deep-sea drilling (360 stations) and a personal study carried out by the authors on the distribution and facies location of authigenic zeolites in the sedimentary mantle of the World Ocean.The scheme of zeolite distribution, compiled for the Holocene—Pleistocene, Miocene, Eocene and Cretaceous periods confirmed the previously established global stratification of zeolites. It showed that the main mass of phillipsite was formed during the Pleistocene—Holocene, while clinoptilolite was a predominant mineral in Eocene and Cretaceous rocks. Both zeolites were wide-spread in the Oligocene and Miocene. Facies location and paragenesis of associated minerals as well as the original material of their formation are different for phillipsite and clinoptilolite.The most probable reasons for vertical stratification of oceanic zeolites of global significance are changes of the character of volcanism in time and general evolution of sedimentation in the World Ocean. 相似文献
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天然沸石吸附性能与阳离子组分之间的关系 总被引：7，自引：0，他引：7
吸附性能是沸石矿物的重要特性之一，也是相关领域应用的重要依据。以嫩江、海林和穆棱三大沸石矿床为例，通过对天然沸石矿的化学成分、沸石类型、矿石品位（CEC值）、比表面积及吸附性能的系统研究与对比分析，总结天然沸石矿附吸性能差异变化规律与原因。研究表明，天然沸石对气体CO2、H2S、SO2、NO2和气态H2O的吸附容量均与其（CaO MgO)/(Na2O K2O)比值之间呈正相关性关系，富二价阳离子组分者吸附容量大，富一价阳离子组分者吸附容量较小。据此，可作为天然沸石矿吸附性能预测评价的重要依据。 相似文献
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R. Montigny H. Bougault Y. Bottinga C.J. Allegre 《Geochimica et cosmochimica acta》1973,37(9):2135-2147
Abundances of major elements, rare earth elements, transition metals, alkali metals and alkaline earth metals have been measured in a representative suite of samples from the Pindos (Greece) ophiolitic complex. Our data indicate that the igneous members of the complex are genetically related. An ocean floor origin of the complex is suggested. 相似文献
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Recent studies suggest that siderophores form stable complexes with divalent metals and affect their mobility. In this work, effects of trihydroxamate microbial siderophores and desferrioxamine-B (DFOB) on Pb(II), Zn(II), and Cd(II) sorption by two kinds of synthesized zeolites (13X and Na?CY) as a function of pH were investigated. Results showed that 13X zeolite has a higher sorption affinity for studied metals than Na?CY. DFOB strongly affected metal sorption on both zeolites. Under slightly acidic to neutral condition, DFOB increased the metal sorption on zeolites due to the sorption of positively charged heavy metal?CDFOB complexes. Whereas by increasing pH (>7), the mobilizing effect of DFOB was observed for Pb, Zn, and Cd. DFOB drastically decreased (80?%) Zn sorption in alkaline condition. As a result, siderophores can weaken the treatment efficiency of zeolites and increase the bioavailability of metals in soils. Surface complexation modeling revealed that the effects of DFOB on metal sorption by 13X and Na?CY zeolites can be explained by the differences in their surface charge. In general, the result shows the influence of DFOB on metal sorption by zeolites over the pH range 4?C9 and decreasing in the sequence Zn?>?Pb?>?Cd. 相似文献