摘要
通过静态吸附试验研究了3种岩样(泥岩、粉砂泥岩、细砂岩)对地下气化典型污染物挥发酚的吸附作用,获得了挥发酚在岩石中的吸附特性,并根据其所符合的等温吸附模型,计算了代表岩石吸附能力的分配系数。结果表明,岩样吸附作用在48 h后达到平衡,对挥发酚的吸附性能从大到小依次为泥岩、粉砂泥岩、细砂岩,pH为中性时吸附效果最好,泥岩受热后吸附性能降低。岩样对挥发酚的吸附作用属于物理吸附,符合Henry等温吸附模型,在泥岩、粉砂泥岩、细砂岩中的分配系数分别为3.367、0.446、0.053 L/g,表明泥岩对挥发酚的吸附作用最强。
A static adsorption experiment was carried out to investigate the adsorption activity of different rock samples （ mudstone, sandy mudstone and sandstone） on volatile phenol which belonged to one of typical underground coal gasification contaminants. The adsorption behaviors of volatile phenol in the rocks were achieved, and the distribution coefficients which represented the adsorption ability of rocks were calculated based on the isotherm adsorption model. The results showed that adsorption reached equilibrium in 48 hours. The adsorption ability on volatile phenol from large to small was mudstone, sandy mudstone and sandstone. The adsorption behavior was the best when the pH value was neutral.When the mudstone was high-temperature heated, the adsorption ability would decrease. The adsorption behaviors of all rock samples for volatile phenols were physical adsorption and accorded with Henry isothermal adsorption. The distribution coefficient of mudstone, sandy mudstone and sandstone were 3.367,0.446, 0.053 L/g respectively, which indicated that the adsorption ability of mudstone to volatile phenol was the strongest.
出处
《煤炭科学技术》
CAS
北大核心
2014年第3期113-116,共4页
Coal Science and Technology
基金
国家高技术研究发展计划(863计划)资助项目(2011AA050105)
中央高校科研业务专项基金资助项目(2009QH13)
教育部新世纪人才支持计划资助项目(NCET-10-0773)
教育部"大学生创新实验计划"资助项目(110301g)
关键词
煤炭地下气化
地下水污染
围岩介质
等温吸附
挥发酚
分配系数
underground coal gasification
groundwater pollution
surrounding rock medium
isothermal adsorption
volatile phenols
distribution coefficient
