文献类型：期刊文献

英文题名：Changing Soil Water Content: Main Trigger of the Multi-Phase Mobilization and Transformation of Petroleum Pollution Components-Insights from the Batch Experiments

作者：Yang, Mingxing Wang, Bing Xia, Yubo Qiu, Yan Li, Chunling Cao, Zhendong

通信作者：Wang, B[1]

机构：[1]Guizhou Inst Technol, Sch Resource & Environm Engn, Guiyang 550003, Peoples R China;[2]Tianjin Geothermal Explorat & Dev Design Inst, Tianjin 300250, Peoples R China;[3]China Geol Survey, Tianjin Ctr, North China Ctr Geosci Innovat, Tianjin 300170, Peoples R China;[4]Guizhou Bur Geol & Mineral Explorat & Dev, 111 Gecol Party, Guiyang 550081, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Tianjin Geothermal Explorat & Dev Design Inst, Tianjin 300250, Peoples R China.

年份：2024

卷号：16

期号：13

外文期刊名：WATER

收录：;EI(收录号：20242916701934);WOS:【SCI-EXPANDED(收录号:WOS:001270944400001)】；

基金：This research was sponsored by the Guizhou Provincial Basic Research Program (Natural Science) (QKHJC-ZK(2022)-General 186); the National Natural Science Foundation of China (grant Nos. 41602275, 41977298); the High-Level Talent Introduction Program for The Guizhou Institute of Technology (2023GCC085); the Guizhou Provincial Key Technology R&D Program (QKHZC(2023)-General 143); the Provincial Higher Education Teaching Content and Curriculum System Reform Project of Guizhou Province (2023223); the Education and Teaching Reform Research Project of Guizhou Institute of Technology (XJJG-2022-22533); the Open Fund from the Key Lab of Eco-restoration of Regional Contaminated Environment (Shenyang University); the Ministry of Education (KF-22-02); and the Provincial Key Disciplines of Guizhou Province-Geological Resources and Geological Engineering (ZDXK (2018)001).

语种：英文

外文关键词：petroleum contamination; soil water content; NAPL multi-phase; residual saturation; batch experiments

摘要：Soil moisture content continuously alters the types and forms of petroleum organic pollutants in the soil through processes such as dissolution, convection, and dilution, forming complex migration and transformation in a water-air-soil-NAPL system. Field investigations and traditional indoor simulation experiments have difficulty in terms of accurately diagnosing the state of different petroleum pollutants due to the influence of environmental factors and the difficulty of controlling single factors. Batch experiments were conducted to simulate the mobilization and differentiation processes of petroleum pollutants under the influence of soil water content. The results show that (1) the residual content of components is the lowest in coarse sand and the highest in clay, which is mainly affected by soil particles; meanwhile, the residual saturation value of octanoic acid is the largest, and that of toluene is the smallest, as determined in terms of their viscosity and volatility. (2) The infiltration processes of the components are affected by their properties and medium characteristics. Due to its small particle size and strong adsorption, clay has the highest residual saturation of petroleum pollutants (28.8%). This can even be more than twice that of coarse sand (13.3%). For different components, the residual saturations of octanoic acid and toluene are the highest and lowest, respectively (taking fine sand as an example: 25.3% and 13.2%), with a relatively large difference, as determined in terms of viscosity and solubility. (3) As the free phase can migrate freely, it is transformed most rapidly in the pores. The changes in the dissolved phase of each component are relatively small and tend to be gentle. The changes in the residual phase are mainly affected by volatility, viscosity, soil particles, and pore and cosmid content; the degree of change is ordered as follows: toluene > cyclohexane > hexadecane > octanoic acid.