中文摘要：

利用浸提实验研究了草酸和酒石酸作用下花岗岩中钾的释放量与低分子量有机酸种类、浓度和时间的关系,同时讨论了释放出来的钾的可能来源。研究结果表明：草酸浸提钾的能力强于酒石酸,在相同的条件下草酸浸提的钾量是酒石酸的2~27倍;在0.005~0.500 mol L-1浓度范围内,浸提的钾量随着有机酸浓度的升高而增大;浸提的钾量随着浸提时间的延长而增大,最后趋于稳定;在实验过程中,花岗岩的矿物组成未发生明显的变化,说明进入到溶液中的钾并非来自晶格内部,很有可能是来自于正长石、白云母表面及其边缘断键。

英文摘要：

Extraction experiments have been used to research the relationship between the potassium release from granite and the kind,concentration and extraction time of low-molecular-weight organic acid under the effect of oxalic acid and tartaric acid,meanwhile discussing the possible origin of released potassium.The results indicated that oxalic acid extracted 2 to 27 times of potassium than tartaric acid in the same condition.In concentration rang of 0.005-0.500 mol L-1,the contents of extracted potassium increased with the increase of the concentration of the organic acids.The contents of extracted potassium increase with the increase of reacting time and tend to be stable eventually.The constitute of granite was not changed obviously,which indicates that potassium in solution does not come from crystal lattice,but possibly origin from the surface and broken-covalent-bond in edges of orthoclase and muscovite.