固砷矿物臭葱石组成与结构及其浸出稳定性研究现状

发布时间：2018-08-10 22:26

【摘要】：综述了固砷矿物臭葱石的组成与结构性能,及其浸出稳定性研究现状。不同条件下制备的臭葱石样品,会因SO42-夹杂和结晶水量变化,具有不同的组成。已提出双齿双核和双齿单核两种臭葱石结构模型,两者是否属实尚存在争议。臭葱石的溶度积介于10~(-21.17)~10~(-25.83)之间波动。在弱酸性(pH 2~6)、氧化条件下,臭葱石浸出稳定性较高,能较好满足长期堆存要求;而在强酸性或碱性区域,或在还原性条件下,其浸出稳定性较差。
[Abstract]:The composition, structural properties and leaching stability of arsenic-fixing mineral geranite are reviewed. The samples of geranite prepared under different conditions have different compositions due to the change of SO42-inclusion and crystalline water content. Two structural models of geranite, double-tooth binuclear and double-tooth mononuclear, have been proposed. Whether they are real or not is still controversial. The solubility product fluctuates between 10~(-21.17)~10~(-25.83). Under weak acidity (pH 2~6) and oxidation conditions, the leaching stability of scallion is high, which can meet the long-term storage requirements well. However, the leaching stability of scallion is poor in strong acidity or alkaline region, or in reducing condition.
【作者单位】： 中南大学冶金与环境学院;
【基金】：国家自然科学基金项目(51574285)~~
【分类号】：X758
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本文编号：2176392