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Geochemistry of two peats suitable for medical uses and their behaviour during leaching

机译:适用于医疗用途的两种泥炭的地球化学特征及其在浸出过程中的行为

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The compositional characteristics of two peats, from Austria and Italy, have been studied. The Massaciuccoli peat shows a high quantity of trace elements (Br, Cd, Mo, Se, U, As and Sb) with respect to the average shale, whereas the Neydheding peat contains more Br, Se and U. Since the therapeutic properties of peats are broad and interesting, the mobility of trace elements (As, Cd, Hg, Pb, Sb, Se, Te and Tl) used for pelotherapy, during water leaching and after Na exchange, have been checked. The data conceming the leaching procedure indicate that the analysed peats are rather stable materials under laboratory conditions. Although the concentration of some toxic elements (As, Se, Cd and Hg) in bulk peats are of the same order of magnitude as in muds used in pelotherapy, the release after similar leaching is lesser. The higher release from muds could be explained by the high exchange capacity of smectite minerals. These minerals are characterised by low cation selectivity because the chemical interactions between smectite and sorbed species is mainly ionic. On the other hand, the cation--organic matter interactions can establish a higher degree of covalent bonds, that are more stable during the interactions developed with leaching. An additional possibility can be considered taking into account the genetic conditions of peat formation. In the upper part, the acidic and oxidising conditions cause the depletion of mobile elements. This process can be seen as a natural cleaning, which occurs under relatively strong conditions compared to the use during medical treatments.
机译:研究了来自奥地利和意大利的两种泥炭的组成特征。 Massaciuccoli泥炭相对于平均页岩显示出大量的微量元素(Br,Cd,Mo,Se,U,As和Sb),而Neydheding泥炭包含更多的Br,Se和U。广泛而有趣的是,在水浸过程中和交换钠后,已对用于水疗法的微量元素(As,Cd,Hg,Pb,Sb,Se,Te和Tl)的迁移性进行了检查。证实浸出过程的数据表明,分析出的泥炭在实验室条件下是相当稳定的材料。尽管散装泥炭中某些有毒元素(As,Se,Cd和Hg)的浓度与土壤疗法中使用的泥浆的浓度数量级相同,但在类似浸出后的释放较少。蒙脱石矿物的高交换能力可以解释其从泥浆中释放的更高。这些矿物的特征在于阳离子选择性低,因为蒙脱石与被吸附物质之间的化学相互作用主要是离子性的。另一方面,阳离子与有机物的相互作用可以建立更高程度的共价键,在通过浸出形成的相互作用过程中更稳定。考虑泥炭形成的遗传条件,可以考虑其他可能性。在上部,酸性和氧化条件导致活动元素的消耗。该过程可视为自然清洁,与药物治疗期间的使用相比,在相对较强的条件下进行。

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