文献类型：期刊文献

英文题名：Study on the migration mechanisms of water-soluble agents in high-pressure rotary jetting remediation

作者：Zhang, Wenjie Mi, Yongbao Jiao, Weiguo

第一作者：Zhang, Wenjie

通信作者：Zhang, WJ[1]

机构：[1]Shanghai Univ, Sch Mech & Engn Sci, Shanghai 200444, Peoples R China;[2]Guizhou Inst Technol, Dept Civil Engn, Guiyang 550003, Peoples R China

第一机构：Shanghai Univ, Sch Mech & Engn Sci, Shanghai 200444, Peoples R China

通信机构：corresponding author), Shanghai Univ, Sch Mech & Engn Sci, Shanghai 200444, Peoples R China.

年份：0

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;Scopus(收录号：2-s2.0-85131067945);WOS:【SCI-EXPANDED(收录号:WOS:000801174400008)】；

基金：This work was supported by National Natural Science Foundation of China (Grant number 41772300).

语种：英文

外文关键词：High-pressure rotary jetting; Water-soluble agents transport; Migration mechanism; Sand erosion model; Numerical simulation; Advection-diffusion

摘要：High-pressure rotary jetting (HPRJ) remediation is a recent-applied technology for in situ remediation of contaminated soils. The effectiveness of remediation depends upon the migration and distribution of the injected agents in the soil. However, the corresponding migration mechanisms have received little attention. In this study, laboratory HPRJ tests and numerical simulations were performed using chlorine (Cl) as a tracer to investigate the transport during HPRJ and the subsequent advection and diffusion. The test results showed that the HPRJ transported Cl- into the mixing zone by eroding the sand, and the radius of the mixing zone could be reasonably predicted by the erosion model. The Cl- concentration decreased linearly along the radial direction in the mixing zone. In addition, the Cl- transport distance increased with the increase in nozzle diameter, jetting times, especially injection pressure, and decreased with an increasing rotation speed. The Cl- concentration and radial uniformity were correlated positively with rotation speed, particularly nozzle diameter and jetting times. Numerical simulation showed that part of Cl- migrated from the mixing zone to diffusion zone by advection-diffusion after rotary jetting, which contributed positively to the agent distribution distance and uniformity. The Cl- migration was dominated by advection in the initial stage (30 days), while diffusion became more important thereafter.