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| Remediation of p-nitrophenol contaminated groundwater using Fe2+/O2/ligand advanced oxidation system enhanced by groundwater circulation well |
| ZHAO Wei1,2,3, ZHANG Cheng-wu1,2,3, ZHANG Hui1,2,3, YAO Yu1,2,3, XIN Si-yi1,2,3, QIN Chuan-yu1,2,3 |
1. Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;
2. National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China;
3. Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China |
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Abstract In this study, GCW was coupled with the advanced oxidation system based on Fe2+ activated O2 to achieve efficient transmission and uniform distribution of chemical agents while continuously replenishment of oxygen to groundwater, so as to enhance the remediation effect of the Fe2+/O2/ligand was advanced oxidation system. The variation law of groundwater flow field and enhanced transport effect of solute under the enhancement of GCW were clarified using two-dimensional simulation tank experiment combined with visualization methods such as tracer dyeing. In addition, sodium tripolyphosphate (STPP) was selected as the ligand, and the effect of advanced oxidation system on the remediation of p-nitrophenol (PNP) polluted aquifer was investigated by injection of chemicals into the well. The results show that GCW had achieved efficient transmission of chemical agents and provided sufficient O2 for advanced oxidation reactions. Under the enhancement of GCW, PNP was degraded throughout the simulated tank, with an average degradation rate of 62% in 15h. The results provide a new insight for efficient remediation of organic contaminated groundwater.
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Received: 28 July 2024
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