Abstract：
This study selected a contamination site associated with pesticide production to investigate the impact of soil settlement induced by pumping on the migration and transformation of the principal pollutant, aniline. The TMVOC model was enhanced by incorporating the settlement effect and validated through a soil-column experiment, which examined aniline distribution, phase transformation, and remediation efficiency under soil settlement. The results indicate that the optimized TMVOC model can accurately simulate the impact of pumping-induced soil settlement on aniline removal. The longitudinal migration of aniline was reduced, with the area of high concentrations drawing nearer to the surface. Furthermore, soil settlement negatively affected the removal of aniline in the Non-Aqueous Phase Liquid (NAPL) phase, resulting in a 10.59 % decline in the removal rate. In contrast, soil settlement positively influenced aniline removal in the gas and aqueous phases, increasing the removal rate by 12.55 % and 5.04 %, respectively, with the gas phase showing the most significant increase. Soil porosity decreased due to soil settlement, leading to a change in the proportion of each phase, with NAPL increasing after remediation. Additionally, soil settlement exhibited hysteresis, as evidenced by a noticeable decrease in the removal rate in the 10th month of the remediation process, and the final mass removal rate was reduced by 5.93 %.
摘要：
这项研究选择了与农药生产相关的污染地点，以研究抽水引起的土壤沉降对主要污染物迁移和转化的影响。苯胺。通过结合沉降效应增强了TMVOC模型，并通过土柱实验进行了验证，它检查了苯胺的分布，相变,和土壤沉降下的修复效率。结果表明,优化后的TMVOC模型能够准确模拟抽水诱导土壤沉降对苯胺去除的影响。苯胺的纵向迁移减少，高浓度区域更靠近表面。此外，土壤沉降对非水相液体（NAPL）相中苯胺的去除产生负面影响，导致去除率下降10.59%。相比之下,土壤沉降对气相和水相中苯胺的去除有积极影响，去除率分别提高12.55%和5.04%，分别,气相呈现最显著的增加。由于土壤沉降，土壤孔隙度降低，导致每个阶段比例的变化，随着NAPL在补救后的增加。此外,土壤沉降表现出滞后性，在补救过程的第10个月，去除率显着下降，最终质量去除率降低了5.93%。
