In order to improve the remediation efficiency of the groundwater circulation well (GCW) on toluene-contaminated soil, we used a combination of GCW and Fenton reagent for remediation. Taking a toluene-contaminated site in Suzhou City, Jiangsu Province, China, as an example, Fenton reagent with a molar ratio of H2O2/contaminant = 10:1 and H2O2/Fe2+ = 2:1 was added to GCW at an aeration rate of 0.005 m3/s. After 216 h of remediation, the toluene concentrations at the site were reduced to the remediation target values. In this study, the Fenton reagent was rapidly delivered to the influence radius of GCW, which reduced the time required for remediation and provided a new model for the application of GCW.

  • Fenton-reactive groundwater circulation well (GCW) was used for toluene removal from the contaminated site.

  • In this study, the cost of repairing 1 m³ contaminated groundwater is 300–400 yuan, with high economic benefits.

  • Fenton-reactive GCW is effective for toluene remediation in actual silt-contaminated sites.

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