陇东油区石油类物质在土壤中的吸附解吸行为研究  

ON ADSORPTION AND DESORPTION BEHAVIOR OF PETROLEUM SUBSTANCES IN THE SOIL OF LONGDONG OIL REGION

作　　者：朱恒 杨琴[1,2] 张海玲[1,2] 曹海伟[1] Zhu Heng;lang Qin;Zhang Hailing;Cao Haiwei(PetroChina Changqing Oilfield Company,Xi'an,Shaanxi,710016;National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields,Xi'an,Shaanxi,710016)

机构地区：[1]中国石油天然气股份有限公司长庆油田分公司,陕西西安710016 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710016

出　　处：《石油化工安全环保技术》2021年第1期61-64,I0004,共5页Petrochemical Safety and Environmental Protection Technology

摘　　要：洒落在油区土壤中的原油在土壤中发生吸附解吸、迁移转化以及降解等一系列复杂的理化作用,而吸附解吸行为是制约原油在土壤中迁移入渗的关键步骤。通过静态吸附和解吸实验,研究了原油在以黄绵土为主的陇东油区土壤中的吸附解吸行为,考察了温度、pH、土壤盐度等因素对吸附量的影响,结果表明:黄绵土对石油类物质的等温吸附过程可以用Langmuir等温吸附模型描述,吸附动力学过程可以用二级动力学方程很好地描述。通过吸附解吸行为研究,得出石油类物质易被黄绵土吸附,但是由于吸附量较小,且吸附作用以物理单分子层吸附为主,易发生脱附迁移。Crude oil spilled on the soil in the oil area may undergo a series of complex physical and chemical effects/reactions involving adsorption, desorption, migration and transformation, and degradation in the soil. The adsorption and desorption behavior is a key step that restricts the migration and infiltration of crude oil in the soil. Through static adsorption and desorption experiments, this paper studies the adsorption and desorption behavior of crude oil in the soil of Longdong oil region which is mainly composed of loessial soil. It investigates the effects of temperature, pH, soil salinity and other factors on the adsorbance. The results show that the isothermal adsorption process of loessial soil on petroleum substances can be described by Langmuir isothermal adsorption model, and the adsorption dynamic process can be described by the second-order kinetic equation. Through study of the adsorption and desorption behavior, it is concluded that petroleum substances are easy to be absorbed by loessial soil. But because the amount of adsorption is small and the adsorption is mainly physical monolayer adsorption, petroleum substances are prone to be desorbed and migrated.

关 键 词：原油污染 吸附解吸 陇东油区 黄绵土 

分 类 号：X53[环境科学与工程—环境工程]