大屯矿区煤和煤系岩石淋出微量元素行为比较
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摘要
对徐州大屯矿区矿井水中主要微量元素的含量以及淋出行为进行了分析,发现矿井水呈弱碱性,高矿化度的特点,Hg、Se等元素含量较高。为研究微量元素淋出的行为,在不同淋滤条件下(p H值为2,5.6和12)对煤及煤系岩层进行了淋滤实验,结果显示:金属微量元素Pb和Cd在酸性条件下溶出量较大,As,Hg和Se在碱性条件下淋出量较大;Cr在酸性条件下淋出量略高于碱性条件下的淋出量。与煤中微量元素淋出行为相比较,煤系岩层的的淋出量更大。Pb、Cd、As的岩石淋出比例明显高于煤的淋出率,Hg和Se的淋出比例在两种介质中差别较小,与微量元素的赋存状态有关。矿区地表水中As、Hg等含量降低,Pb、Zn、Cu等元素的含量升高,说明矿井水与地表水混合的过程中,微量元素的形态发生了显著的变化。
The trace elements in the coal mine water in the Xuzhou-Datun coal mine district were analyzed,finding that Hg and Se were relatively high,with high polluting potential comparing with the national standard. Leaching experiments of the coal and coal measure strata rock in varies p H conditions( p H = 2,5,6,12).The metal elements,Pb and Cd,tend to leach more in the acid environment,meanwhile,As,Hg,and Se tend to leach more in the alkaline environment. The chromium tends to relatively balance,but a little high in the acid environment. Comparing the leaching behavior of coal and rock,the rock was found to release higher trace element concentrations. Considering the content in solid bulk,the Pb,Cd and As were leached higher from rock than coal. Up to present,the trace element researches in coal mine water focus more on the coal leaching,but not the rock leaching behavior. The result suggests that the behavior and mechanism of leaching from coal and coal measure strata rock need deeper insight.
The trace elements in the coal mine water in the Xuzhou-Datun coal mine district were analyzed,finding that Hg and Se were relatively high,with high polluting potential comparing with the national standard. Leaching experiments of the coal and coal measure strata rock in varies p H conditions( p H = 2,5,6,12).The metal elements,Pb and Cd,tend to leach more in the acid environment,meanwhile,As,Hg,and Se tend to leach more in the alkaline environment. The chromium tends to relatively balance,but a little high in the acid environment. Comparing the leaching behavior of coal and rock,the rock was found to release higher trace element concentrations. Considering the content in solid bulk,the Pb,Cd and As were leached higher from rock than coal. Up to present,the trace element researches in coal mine water focus more on the coal leaching,but not the rock leaching behavior. The result suggests that the behavior and mechanism of leaching from coal and coal measure strata rock need deeper insight.
引文
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[3]李庭,冯启言,周来,等.废弃矿井地下水污染风险评价系统开发[J].能源环境保护,2014,2:13-16.
[4]Sun W,Wu Q,Liu H,Jiao J.Prediction and assessment of the disturbances of the coal mining in Kailuan to karst groundwater system[J].Physics and Chemistry of the Earth,2015,89-90:136-144.
[5]Wildemeersch S,Brouyere S,et al.Application of the hybrid finite element mixing cell method to an abandoned coalfield in Belgium[J].Journal of Hydrology,2010,392:188-200.
[6]Klinger C,Charmoille A.Strategies for follow-up care and utilization of closing and flooding in European hard coal mining areas[J].International Journal of Coal Journal,2012,89:51-61.
[7]董玉龙,彭莹,等.层次分析法在山东省废弃矿井危害性评价中的应用[J].山东国土资源,2013,29:85-87.
[8]李瑞宁,邓勇.基于GIS的废弃矿井调查与规划信息管理系统开发[J].信息安全与技术,2015,6:89-90.
[9]焦艳军,王广才,等.基于氢氧同位素和水化学的废弃煤矿充水水源识别[J].第四纪研究,2014,34(5):1054-1061.
[10]Zhou J,Zhang Q,et al.Using multi-isotope(34S,18O,2H)to trackcontamination of the groundwater from Hongshan-Zhaili abandoned coal mine,Zibo city,Shandong province[J].International Biodeterioration&Biodegradation,2016,26:1-8.
[11]郭钰颖,吕智超,等.峰峰矿区东部地下水水文地球化学模拟[J].煤田地质与勘探,2016,44(6):101-105.
[12]宋党育,张晓逵,张军营,等.煤中有害微量元素的洗选迁移特性[J].煤炭学报,2010,35(7):1170-1176.
[13]王文峰,秦勇,宋党育,等.安太堡矿区11号煤层的元素地球化学及其洗选洁净潜势研究[J].中国科学D辑中国科学,2005,35(10):963-972.
[14]宋党育,秦勇,张军营,等.晋北—宁北煤中痕量元素的地球化学特征[J].地球化学,2005,34(3):248-256.
[15]单耀,秦勇,王文峰.徐州-大屯矿区矿井水类型与水质分析.能源技术与管理,2007,116:41-43.
[16]单耀.徐州大屯矿区矿井水影响下地表水微量元素污染及土壤碱化潜势分析.华北科技学院学报,2016,13(6):91-95.
[17]宋党育.煤中有害微量元素燃烧、淋滤迁移行为及其环境效应[D].中国矿业大学.2003.
[18]赵峰华.煤中有害微量元素分布赋存机制及燃煤产出淋滤试验研究[D].北京:中国矿业大学,1997:53-58.
[19]李功振,许爱芹.京杭大运河(徐州段)砷的形态的分布特征研究[J].环境科学与技术,2008,31(1):69-71.