自燃煤矸石吸附煤矿酸性废水矿物学特性研究
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摘要
针对煤矿酸性废水污染问题,采用SEM、XRD和FTIR等分析测试手段,对吸附煤矿酸性废水前后的自燃煤矸石、Na OH改性自燃煤矸石和SRB协同自燃煤矸石样品进行矿物学特性研究。结果表明:自燃煤矸石通过表面孔隙吸附作用和发生配位反应,将煤矿酸性废水中的离子以小颗粒的形式沉积在自燃煤矸石表面。Na OH改性过程溶出自燃煤矸石表面的部分物质,使煤矸石表面出现大量孔隙。对比XRD谱图和红外光谱图可知,自燃煤矸石中的石英和钠长石等矿物成分在吸附煤矿酸性废水时起到了一定的作用。SRB协同自燃煤矸石过程对自燃煤矸石结构成分的影响比Na OH改性过程影响大,附着在煤矸石表面的SRB不仅影响自燃煤矸石表面的矿物质成分,形成黑色硫化物颗粒,还可以直接处理煤矿酸性废水,进一步提高对煤矿酸性废水的处理效果。
This paper examines the mineralogical characteristics of samples of spontaneous combustion coal gangue before and after the absorption of acid mine drainage, and samples of spontaneous combustion coal gangue which have been modified by NaOH or synergistically interacted with SRB by analytical and testing methods, such as SEM, XRD and FTIR in order to address environmental pollution issues caused by acid mine drainage. The results show that the ions in acid mine drainage are deposited on the surface of spontaneous combustion coal gangue in the form of small particles through surface pore adsorption and the coordination reaction of spontaneous combustion coal gangue. The NaOH modification process leads to dissolution of part of the surface material of spontaneous combustion coal gangue, so that a large number of pores on the surface are formed. In the comparison of XRD spectra and FTIR spectra, it is found that the mineral elements such as quartz and albite in spontaneous combustion coal gangue play a role in the adsorption of acid mine wastewater. The SRB-induced synergistic interaction with spontaneous combustion coal gangue has more impact on the structure of spontaneous combustion coal gangue compared to the Na OH-induced modification process. SRB which are attached to the surface of coal gangue not only affect the mineral composition on the surface of spontaneous combustion coal gangue, and lead to the formation of black sulfide particles, but also possess a direct treatment of acid mine wastewater, and therefore further improve their treatment effect on coal mine acid wastewater.
This paper examines the mineralogical characteristics of samples of spontaneous combustion coal gangue before and after the absorption of acid mine drainage, and samples of spontaneous combustion coal gangue which have been modified by NaOH or synergistically interacted with SRB by analytical and testing methods, such as SEM, XRD and FTIR in order to address environmental pollution issues caused by acid mine drainage. The results show that the ions in acid mine drainage are deposited on the surface of spontaneous combustion coal gangue in the form of small particles through surface pore adsorption and the coordination reaction of spontaneous combustion coal gangue. The NaOH modification process leads to dissolution of part of the surface material of spontaneous combustion coal gangue, so that a large number of pores on the surface are formed. In the comparison of XRD spectra and FTIR spectra, it is found that the mineral elements such as quartz and albite in spontaneous combustion coal gangue play a role in the adsorption of acid mine wastewater. The SRB-induced synergistic interaction with spontaneous combustion coal gangue has more impact on the structure of spontaneous combustion coal gangue compared to the Na OH-induced modification process. SRB which are attached to the surface of coal gangue not only affect the mineral composition on the surface of spontaneous combustion coal gangue, and lead to the formation of black sulfide particles, but also possess a direct treatment of acid mine wastewater, and therefore further improve their treatment effect on coal mine acid wastewater.
引文
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[12]陈凤梅,李亚新.硫酸盐还原菌处理酸性矿山废水的技术及思考[J].工业用水与废水,2007,38(1):17-20.
[13]孙志华,刘开平,汪敏强,等.自燃煤矸石活性对水泥砂浆性能的影响[J].混凝土与水泥制品,2012(3):67-70.
[2]王现丽,牛云峰,吴俊峰.改性煤矸石作为废水处理吸附剂的试验研究[J].金属矿山,2010(7):161-162,172.
[3]倪师军,李珊,李泽琴,等.矿山酸性废水的环境影响及防治研究进展[J].地球科学进展,2008(5):501-508.
[4]程健明,汤浩,魏刚,等.利用硫酸盐还原菌处理含重金属离子酸性废水研究进展[J].广东化工,2014,41(9):91-92.
[5]毕舒,谢先德,方邺森,等.鲁西南煤夹矸的矿物学特性研究及应用前景[J].地球化学,2003,32(3):291-296.
[6]孙志华,刘开平,汪敏强,等.自燃煤矸石活性研究[J].建筑材料学报,2013(3):497-502.
[7]BUYANOV R A,MOLCHANOV V V,BOLDYREV V V.Mechanochemical activation as a tool of increasing catalytic activity[J].Catalysis Today,2009,144(3):212-218.
[8]杜明展,陈莉荣,李玉梅,等.煤矸石的改性及其对稀土生产废水中氨氮的吸附[J].化工环保,2012(4):377-380.
[9]李冬,陈华军.煤矸石制备废水吸附剂的研究进展[J].洛阳理工学院学报(自然科学版),2012,22(3):6-9,15.
[10]曾懋华,龙来寿,黎载波,等.改性煤矸石去除凡口铅锌矿选矿废水中硫化物[J].金属矿山,2013(4):151-154.
[11]胡振琪,马保国,张明亮,等.高效硫酸盐还原菌对煤矸石硫污染的修复作用[J].煤炭学报,2009,34(3):400-404.
[12]陈凤梅,李亚新.硫酸盐还原菌处理酸性矿山废水的技术及思考[J].工业用水与废水,2007,38(1):17-20.
[13]孙志华,刘开平,汪敏强,等.自燃煤矸石活性对水泥砂浆性能的影响[J].混凝土与水泥制品,2012(3):67-70.