俄罗斯原油在两种土壤体系中的吸附研究

Study of the Adsorption of Russia Crude Oil in Two Kinds of Soil System

通过水-土体系和有机物-土体系的动态吸附试验,研究了中俄输油管道沿线的粉质黏土和黏土混碎石对俄罗斯原油的吸附性能和特征,并探讨了非油有机物对土壤吸附原油的影响。结果表明:在水-土体系中,土壤吸附原油的平衡时间为2h,黏土混碎石和粉质黏土对原油的平衡吸附量分别为5.320 6mg/g和3.336 3mg/g;在有机物-土体系中,由于有机物与原油呈竞争关系,土壤吸附俄罗斯原油的平衡时间延迟至8h,黏土混碎石和粉质黏土对原油的平衡吸附量分别降低至1.752 6mg/g和1.333 5mg/g;在两种体系中,黏土混碎石对原油的吸附性能强于粉质黏土,且两种土壤对原油的吸附动力学过程皆遵循Lagergren准二级动力学方程。

Through dynamic adsorption experiments of water-soil system and organics-soil system, this pa- per studies the properties and characteristics of the adsorption of Russian crude oil in silty clay and clay mixed macadam taken from the soil along the Sino-Russian oil pipeline,and investigates the impact of non- oil organics on the adsorption of crude oil in the soil. The results show that the equilibrium time taken for the adsorption of crude oil in the soil is 2 hours in the water-soil system,and the equilibrium absorption ca- pacity of silty clay and clay mixed macadam is 3. 336 3 mg/g and 5. 320 6 mg/g respectively. While in the organics-soil system,on account of the competitive relationship between organics and crude oil,the equilib- rium time taken for the adsorption of crude oil in the soil is delayed to 8 hours, and the equilibrium absorp- tion capacity of silty clay and clay mixed macadam is lowered to 1. 333 5 mg/g and 1. 752 6 mg/g respec- tively. Besides,in the two systems,clay mixed macadam has higher performance of adsorbing crude oil than silty clay does,and the dynamic adsorption process of crude oil in silty clay and clay mixed macadam fol- lows the Lagergren pseudo-second order kinetics equation.