李松鹏;吴攀;李学先;陈满志;吴敏;

• 1:贵州大学资源与环境工程学院喀斯特地质资源与环境教育部重点实验室
• 2:贵州大学农学院

摘要(Abstract)：

为探究不同风化程度含煤岩系剖面中潜在有毒元素的地球化学特征，以黔西南龙潭组含煤岩系为研究对象，采用XRD、XRF、ICP-MS、BCR连续提取等技术和方法，对比分析不同风化程度含煤岩系剖面的化学组成、矿物学特征和潜在有毒元素含量及其赋存形态。结果表明，含煤岩系在风化过程中表现为明显的Si、Al累积和Fe的流失。相较于弱风化剖面，强风化剖面中伊利石、高岭石等粘土矿物占比相对较大，黄铁矿占比相对较小。弱风化和强风化含煤岩系剖面均较为富集As。强风化泥岩较弱风化泥岩表现为As、Cd的流失和Cr累积的特征；强风化煤中Cr、As、Cd、Pb均出现不同程度的累积，其中Cr、As累积最为明显。不同风化程度的煤和泥岩中Cr以残渣态为主，As以残渣态和可还原态为主。潜在有毒元素的迁移释放与元素含量及赋存形态紧密相关，在风化作用过程中其环境效应值得人们关注。

关键词(KeyWords)： 含煤岩系;潜在有毒元素;赋存形态;风化特征

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金委员会-贵州省人民政府喀斯特科学研究中心项目（编号：U1612442）

作者(Authors): 李松鹏;吴攀;李学先;陈满志;吴敏;

DOI: 10.16461/j.cnki.1000-4734.2022.42.075

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