The heterogeneity of the aquifer seriously affects the remediation efficiency of dense non-aqueous phase liquid (DNAPL) due to the low contact efficiency for remediation reagents and DNAPL at macro scale and the restricted moving of DNAPL droplets by capillary forces in pore at micro scale. In this work, colloidal biliquid aphron (CBLA) as a remediation reagent was proposed, it has the rheological properties of shear thinning and the ultra-low interfacial tension between DNAPL. This work investigated the mechanisms and efficiencies of remediation DNAPL-contaminated heterogeneous aquifers using CBLA by sandbox and micromodel scale. The results indicated that CBLA could improve the mass transfer efficiency by both increasing the sweeping and extraction efficiency. The remediation efficiency of tetrachloroethylene (PCE) in aquifers with different permeability was above 99 % in sandbox, with the highest effluent concentration of 1.89 × 10⁵ mg/L. Furthermore, at micromodel scale, CBLA could raise the remediation efficiency by improving the mobility and emulsification of PCE droplets. There was no PCE residue in the fine pore throats, and the remediation efficiency was 99.49 % in micromodel experiment and simulation. This work provided a promising remediation reagent for removing DNAPL from heterogeneous aquifers and laid a theoretical foundation for its practical application.

含水层的非均质性严重影响了稠密非水相液体（DNAPL）的修复效率，宏观尺度上修复剂与DNAPL的接触效率低，微观尺度孔隙中毛细管力限制了DNAPL液滴的移动。本工作提出了胶体双液体泡沫（CBLA）作为修复试剂，它具有剪切稀化的流变特性和DNAPL之间的超低界面张力。这项工作通过沙箱和微模型规模研究了使用 CBLA 修复 DNAPL 污染的异质含水层的机制和效率。结果表明，CBLA可以通过提高吹扫效率和萃取效率来提高传质效率。沙箱对不同渗透率含水层四氯乙烯（PCE）的修复效率均在99%以上，最高出水浓度为1.89×10 5 ^mg  /L。此外，在微模型尺度上，CBLA可以通过改善PCE液滴的流动性和乳化性来提高修复效率。细孔喉中无四氯乙烯残留，微模型实验和模拟修复效率达99.49%。该工作为去除异质含水层中的DNAPL提供了一种有前景的修复试剂，并为其实际应用奠定了理论基础。