论文部分内容阅读
采用X射线衍射(XRD)和电子探针显微分析技术(EPMA)对海相沉积汞矿特征进行了研究,分析了汞的迁移转化规律。表征结果表明,矿石类型包括白云石、方解石、钼钨钙矿、朱砂矿、钙钼矿和少量的钋矿;矿石结构致密,呈包裹和裂隙状态;汞主要以氧化矿为主,还有微量的单质汞,含量约为0.15%(以Hg计)。水和土壤环境中的汞易被各种配位体、有机质、无机颗粒物以及粘土矿等吸附形成有机汞(如甲基汞),一部分汞以气态形式进入大气。
The characteristics of marine sedimentary mercury deposits were studied by X-ray diffraction (XRD) and electron probe microanalysis (EPMA), and the migration and transformation rules of mercury were analyzed. The characterization results show that the ore types include dolomite, calcite, molybdenite, cinnabar, calcium molybdenum ore and a small amount of ore; the ore has a dense structure with parcels and fractures; the mercury is mainly oxidized and the trace minerals Of elemental mercury, in an amount of about 0.15% (in terms of Hg). Mercury in water and soil environment is easily adsorbed by various ligands, organic matter, inorganic particles and clay minerals to form organic mercury (such as methylmercury), and part of mercury enters the atmosphere in gaseous form.