Study of the weathering of albite at room temperature and pressure with a fluidized bed reactor
Study of the weathering of albite at room temperature and pressure with a fluidized bed reactor
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流化床反应器常温常压钠长石风化研究
DOI：
10.1016/0016-7037(84)90217-5
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发表时间：
1984
影响因子：
5
通讯作者：
R. Wollast
中科院分区：
文献类型：
--
作者：
L. Chou;R. Wollast
利用流化床连续反应器研究了钠长石风化初期的动力学和机理。同时测定的Si，Al和Na和所观察到的低浓度的溶解的元素，总是在低于饱和度的水平，相对于可能的二次沉淀物，表明在长石的表面发生的几十埃的残留层的形成。该层的组成（富含Si和/或Al）强烈依赖于水溶液的pH。该层的形成之后是准稳态的建立，在此期间，钠长石的溶解倾向于成为化学计量的。
A continuous reactor based on the fluidized bed technique was developed in order to study the kinetics and the mechanisms of the initial stages of weathering of albite. Simultaneous determination of Si, Al and Na and the observed low concentrations of the dissolved elements which were always at levels below saturation with respect to possible secondary precipitates, indicate that formation of a residual layer of a few tens of angstroms occurred at the surface of the feldspar. The composition of this layer, enriched in Si and/or Al, is strongly dependent on the pH of the aqueous solution. The formation of the layer is followed by the establishment of a quasi-steady state during which the dissolution of albite tends to become stoichiometric.