摘要
探讨了西部矿区侏罗系煤层覆岩典型煤系沉积岩(砂质泥岩和细砂岩)对Mn(Ⅱ)的等温吸附和解吸特性,分析了温度、pH值和固液比对岩样吸附特性的影响.结果表明:随着温度升高,细砂岩的饱和吸附量明显增大,而砂质泥岩的饱和吸附量增大程度较小;Mn(Ⅱ)溶液的pH值由2增至4时,砂质泥岩和细砂岩对Mn(Ⅱ)的吸附效率分别增大4和2倍;而当pH值大于4时,砂值泥岩和细砂岩对Mn(Ⅱ)的吸附效率无明显变化;溶液固液比由1∶800增加至1∶50的过程中,砂质泥岩和细砂岩的吸附效率分别由32.9%和44.8%增加至90.6%和99.2%;砂质泥岩对Mn(Ⅱ)的解吸过程缓慢,且无法完全解吸;细砂岩对Mn(Ⅱ)的解吸量极低,具有较强的化学吸附性.
The isotherm adsorption and desorption characteristics of Mn(Ⅱ)on typical sedimentary rocks(sandy mudstone and fine sandstone)of coal measures from the overlying strata of Jurassic coal seam in western mining areas as well as the influencing factors such as temperature,pH value and solid-liquid ratio were discussed and analyzed.The results show that with the increase of temperature,the saturated adsorption capacity of fine sandstone increases obviously,while that of sandy mudstone increases to a less degree.When the pH value of Mn(Ⅱ)solution increases from 2 to 4,the adsorption efficiency of sandy mudstone and fine sandstone increases by 4 and 2 times respectively,after which the increase of pH value has no obvious change on the adsorption capacity of Mn(Ⅱ).The adsorption efficiency of sandy mudstone and fine sandstone increase from 32.9%and 44.8%to 90.6%and 99.2%respectively as the solid-liquid ratio of solution increases from 1∶800 to 1∶50.The desorption process of Mn(Ⅱ)on sandy mudstone is slow and incomplete while fine sandstone has strong chemisorption and extremely low desorption capacity for Mn(Ⅱ).
作者
姚强岭
王伟男
夏泽
朱柳
王傲
于利强
YAO Qiangling;WANG Weinan;XIA Ze;ZHU Liu;WANG Ao;YU Liqiang(State Key Laboratory of Groundwater Protection and Utilization in Coal Mining,China Energy Group,Bejing 100011,China;State Key Laboratory pf Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2020年第3期411-418,共8页
Journal of China University of Mining & Technology
基金
国家重点研发计划项目(2018YFC0604703)
煤炭开采水资源保护与利用国家重点实验室开放基金项目(SHGF-16-18)
国家自然科学基金项目(51874283)。
关键词
侏罗系煤系沉积岩
采空区矸石
重金属
吸附与解吸特性
sedimentary rocks of coal measures in Jurassic
gangue in goaf
heavy metal
adsorption and desorption characteristics
