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陕南石煤及煤灰中钼元素在固液间迁移规律

张卫国 李焕同 王峰 杨甫 滕金祥

张卫国, 李焕同, 王峰, 杨甫, 滕金祥. 陕南石煤及煤灰中钼元素在固液间迁移规律[J]. 煤田地质与勘探, 2020, 48(2): 64-70. doi: 10.3969/j.issn.1001-1986.2020.02.011
引用本文: 张卫国, 李焕同, 王峰, 杨甫, 滕金祥. 陕南石煤及煤灰中钼元素在固液间迁移规律[J]. 煤田地质与勘探, 2020, 48(2): 64-70. doi: 10.3969/j.issn.1001-1986.2020.02.011
ZHANG Weiguo, LI Huantong, WANG Feng, YANG Fu, TENG Jinxiang. Solid-liquid migration of molybdenum in stone coal and coal ash in southern Shaanxi[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(2): 64-70. doi: 10.3969/j.issn.1001-1986.2020.02.011
Citation: ZHANG Weiguo, LI Huantong, WANG Feng, YANG Fu, TENG Jinxiang. Solid-liquid migration of molybdenum in stone coal and coal ash in southern Shaanxi[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(2): 64-70. doi: 10.3969/j.issn.1001-1986.2020.02.011

陕南石煤及煤灰中钼元素在固液间迁移规律

doi: 10.3969/j.issn.1001-1986.2020.02.011
基金项目: 

国家自然科学基金项目(41802187);陕西省教育厅科研计划项目(18JK0521);陕西省煤炭绿色开发地质保障重点实验室基础研究计划项目(MTy2019-09)

详细信息
    第一作者:

    张卫国,1985年生,男,河北保定人,硕士,工程师,研究方向为煤的微量元素地球化学.E-mail:zhangwg0224@163.com

  • 中图分类号: P595;P618.65

Solid-liquid migration of molybdenum in stone coal and coal ash in southern Shaanxi

Funds: 

National Natural Science Foundation of China(41802187)

  • 摘要: 钼是典型的环境敏感元素,同时也是潜在的稀有金属元素,为了查明钼元素在原煤和煤灰中含量特征及其在固(体)液(体)间的迁移规律,选取陕南石煤及煤灰样为研究对象,利用电感耦合等离子体质谱仪(ICP-MS)分析样品中钼元素含量,通过浸泡实验模拟纯水、酸性、碱性和矿井水4种溶液中石煤及煤灰中钼元素浸出率。结果显示:石煤中钼元素含量为315.4~785.4 μg/g,煤灰中钼元素含量675.5~1 005.1 μg/g,燃烧后钼元素具有向石煤灰中富集(迁移)的趋势;不同类型溶液对石煤中钼元素均呈现不同程度的浸出率,总体特征为酸性溶液中钼元素的浸出率普遍偏低,低于其他3种类型溶液;而石煤灰中钼元素在不同溶液中浸出率不同于石煤样,总体特征为酸性溶液中钼元素的浸出率较高。结合浸出量进一步分析表明,酸性条件抑制了石煤中钼元素的迁出能力,而石煤灰样在酸性溶液中的钼浸出率与浸出量普遍高于其他类型溶液。分析认为,有氧燃烧使有机质释放钼元素、含钼矿热解、对钼的吸附能力等方面发生了变化,导致石煤灰中钼元素的迁移能力有所提升。研究认识具有环境保护和钼元素提取利用双重指导意义。

     

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  • 收稿日期:  2019-11-17
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