洁净煤技术

2020, v.26;No.130(06) 96-101

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神东矿区长焰煤对焦化污染地下水中喹啉的吸附性能
Adsorption performance of quinoline in coking polluted groundwater from Shendong long flame coal

丛日红;高且远;
CONG Rihong;GAO Qieyuan;CHN Energy Shendong Coal Preparation centre;National Engineering Research centre of coal preparation and purification,China University of Mining and Technology;

摘要(Abstract):

煤泥作为煤炭分选中的产品,其高质量化利用是关键。神东矿区作为我国长焰煤的主产地,每年有大量煤泥产出,有必要深入研究其煤泥高质化利用途径。研究了神东矿区长焰煤对焦化污染地下水中喹啉的吸附性,利用激光粒度分析仪、SEM、BET、XRF、XPS对煤样性质进行了分析,通过单因素试验考察了长焰煤投加量、吸附反应时间、初始浓度等因素对吸附效果的影响,探讨了长焰煤表面结构、性质与其吸附性能的关系。结果表明,神东长焰煤是一种天然的炭基吸附剂,其表面粗糙且孔隙结构发达,比表面积为17.53 m~2/g。表面孔结构为介孔,表面含有含氧官能团,且有无机矿物存在。神东长焰煤对喹啉的吸附效果较好,在投加量6 g/L,接触时间30 min,初始浓度4 mg/L时,神东长焰煤对模拟废水中喹啉的去除率为81.46%。吸附行为符合Freundlich等温吸附模型,吸附过程是以表层为主的多层吸附。该吸附行为与喹啉和长焰煤表面性质以及孔径大小有关。根据拟合参数来看,神东煤泥对喹啉的吸附较容易发生,且吸附性能较好。
As a product of coal processing,the high quality utilization of slime is a key problem in the field of coal processing. Shendong mining area,as the main producing area of long flame coal in China,produces a lot of slime every year,and it's necessary to study the utilization way of high quality slime. In this paper,the adsorption of quinoline from coking tail water by long flame coal in Shendong mining area was studied. The properties of coal samples were analyzed by laser particle size analyzer,SEM,BET,XRF and XPS. The influence of factors such as the dosage of long flame coal,adsorption contact time and initial concentration on adsorption effect was investigated by single factor test. The relationship between surface structure,properties and adsorption performance of long flame coal was discussed. The results show that Shendong long flame coal is a natural carbon-based adsorbent with rough surface and developed pore structure,with a specific surface area of 17.53 m~2/g. The surface pore structure is mesoporous,the surface contains oxygen-containing functional groups,and there are inorganic minerals. Shendong long flame coal has good adsorption effect on quinoline. Under the optimal conditions of the dosage 6 g/L,the contact time 30 min,and the initial concentration 4 mg/L,the removal rate of quinoline in simulated wastewater by Shendong long flame coal is 81. 46%. The adsorption behavior is found to accord with Freundlich isotherm model,indicating that the adsorption process is mainly dominated by multi-layer adsorption on the coal surface. The adsorption behavior is related to the surface properties and pore size of quinoline and long flame coal. According to the fitting parameters,the adsorption of quinoline on Shendong coal slime is easy to occur,and the adsorption performance is good.

关键词(KeyWords): 神东长焰煤;吸附;喹啉;水处理
Shendong long flame coal;adsorption;quinoline;water treatment

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基金项目(Foundation): 国家能源集团科技创新项目(CSIEZB170204990)

作者(Author): 丛日红;高且远;
CONG Rihong;GAO Qieyuan;CHN Energy Shendong Coal Preparation centre;National Engineering Research centre of coal preparation and purification,China University of Mining and Technology;

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DOI: 10.13226/j.issn.1006-6772.20080401

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