燃油污染地下水是普遍的环境问题，原位生物修复（ISB）和原位化学氧化（ISCO）是当前备受关注的地下水原位修复技术。相对于多孔介质，该类技术在岩溶含水介质中的应用基础薄弱，认知不足。本项目拟在实验室开展批实验、箱-柱实验和岩溶管道模型实验，模拟汽油污染岩溶含水介质，研究过硫酸盐（PS）氧化联合生物代谢降解地下水中BTEX的机制，目的是更好地明晰岩溶地下水中ISCO去除汽油BTEX的动力学过程，以及ISCO与ISB联合修复汽油污染的可能性。研究内容包括：在静水和流水条件下，岩溶含水介质中PS的分解动力学，ISCO去除BTEX的动力过程及其与ISB联动机制，ISCO对水文地球化学和生物作用的影响，ISCO和ISB之间过渡带指标特征，ISCO和ISB联合效能调控和评价。通过本项目研究，能够为广大岩溶地区燃油泄漏污染地下水的修复提供科学依据，对进一步发展地下水原位修复技术具有学术价值。

Groundwater contaminated by fuel oil is a very common environmental problem. At present, in situ bioremediation (ISB) and in situ chemical oxidation (ISCO) are more concerned in groundwater in situ remediation. Compared with porous media, the basic research of this kind of remediation technology for applicaiton in karst groundwater is weak and the cognition is insufficient. This project intends to carry out batch experiment, box-column experiment and karst conduit model experiment in the laboratory to simulate karst groundwater media polluted by gasoline, and to study the mechanism of BTEX removal from karst groundwater by persulfate (PS) oxidation combined with biological metabolism. The purpose is to better understand the kinetics of ISCO removing gasoline BTEX from karst groundwater and the possibility of ISCO combined with ISB in karst groundwater remediation. The research contents include: decomposition kinetics of PS in karst groundwater media under the condition of both static and flowing water, dynamic process of ISCO removing BTEX and its combined mechanism with ISB, influence of ISCO on hydrogeochemistry and biology, index characteristics of transition zone between ISCO and ISB, optimization and evaluation of ISCO combined efficiency with ISB. This research can provide scientific understandings for the karst groundwater remediation with fuel oil contamination in the wide karst areas, and has academic value for the further development of groundwater in situ remediation technology.