PRB技术在地下水氟污染管控中的应用——以浙江某化工园区为例

Application of PRB Technology in the Control of Groundwater Fluoride Pollution—Taking a Chemical Industry Park in Zhejiang as an Example

摘要: 针对浙江某化工园区层状异质含水层中氟化物与有机污染物的复合污染问题，基于场地水文地质勘察与污染特征分析，构建漏斗–导水门式PRB系统。通过活性炭–沸石复合介质配比试验、柱实验及数值模拟，优化确定渗透系数2.65 × 10⁻² cm/s、吸附层厚度0.6 m的核心设计参数。工程运行数据表明，系统对氟化物的截留效率达85%，有效遏制污染物扩散并提升下游水环境质量。研究揭示了非均质场地中PRB结构设计与多介质耦合的关键机制，为复杂地质条件下地下水复合污染治理提供了技术范式。

Abstract: Aiming at the composite pollution of fluoride and organic pollutants in the layered heterogeneous aquifer of a Zhejiang chemical industry park, a funnel-and-gate structured PRB system was constructed. The design was based on site hydrogeological investigation and pollution characteristic analysis. Core design parameters were optimized via activated carbon-zeolite composite media proportioning tests, column experiments, and numerical simulations, yielding a hydraulic conductivity of 2.65 × 10⁻² cm/s and an adsorption layer thickness of 0.6 m. Engineering operation data demonstrate that the system achieves 85% removal efficiency for fluoride, effectively curbing the spread of the pollution plume and enhancing downstream water environmental quality. This study reveals the key mechanisms of PRB structural design and multi-medium coupling in heterogeneous sites, offering a technical paradigm for groundwater composite pollution remediation under complex geological conditions.