Related Experiment Video
Updated: Jun 12, 2026

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment
Published on: May 2, 2025
Fe2+/O2-based advanced oxidation process coupled with air sparging/ circulation well for in-situ groundwater
Deyu Wang1, Yingqi Wang1, Wei Zhao1
1Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, Jilin 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation, Technology, Jilin University, Changchun 130021, China.
Abstract:
The Fe2+-activated oxygen process is a green and efficient advanced oxidation technology. Tripolyphosphate (TPP) can effectively improve the remediation performance of this system. However, its application in groundwater remediation is limited by low oxygen concentration found in subsurface environments. Heterogeneity of the formation may also limit its application effectiveness. Air sparging (AS) and groundwater circulation wells (GCW) are prevalent air-based technologies for volatile organic contaminant remediation. This study established two synergistic systems of Fe2+/O2/TPP-AS and Fe2+/O2/TPP-GCW via column and tank tests, and systematically evaluated their remediation performance toward typical organic pollutants under varied hydrogeological and operational conditions. In the Fe2+/O2/TPP-AS system, phenol removal was superior in permeable aquifers. In homogeneous aquifers, removal efficiency increased with grain size, reaching 94.1% in coarse sand. In heterogeneous aquifers, high-permeability lenses promoted water circulation and pollutants degradation via bubble pulsation, while low-permeability lenses caused gas bypassing and uneven remediation. For nitrobenzene, aeration alone achieved 43.2% removal in 24 h with tailing; simultaneous aeration-oxidation increased removal to 46.7% in 10 h, reducing time and tailing concentrations. In the Fe2+/O2/TPP-GCW system, partially-screened injection expanded the remediation zone, while fully-screened mode improved average removal efficiency. Continuous reagent injection with partially-screened wells achieved 70.85% average p-nitrophenol removal in heterogeneous media containing a low-permeability lens. Thus, Fe2+/O2/TPP-GCW offers better controllability under complex conditions. Remediation efficiency of both systems depends on media structure, aeration mode, and injection strategy. This study presents two green groundwater remediation technologies, broadening the scope of AS and GCW for pollutants treatment and supporting practical application of Fe2+/O2/TPP-based methods.
More Related Videos
06:35Implementation of a Hyperbolic Vortex Plasma Reactor for the Removal of Micropollutants in Water
Published on: July 25, 2025
09:49Use of a Battery of Chemical and Ecotoxicological Methods for the Assessment of the Efficacy of Wastewater Treatment Processes to Remove Estrogenic Potency
Published on: September 11, 2016
Related Concept Videos
Microbial Bioremediation of Uranium
Microbial Wastewater Treatment
Biological Treatment of Effluent and Waste Water
Bioremediation
Microbial Bioremediation of Hydrocarbons
Microbial Leaching