Advances in studies about the groundwater pollution remediation through the groundwater circulation well using sandbox experiments and simulation methods
In terms of the current serious situation of groundwater pollution,the groundwater circulation well(GCW)is a powerful in-situ remediation method,which can trigger a local hydraulic circulation around the well and capture contaminants into the well for subsequent treatments.The GCW covers the shortages of ex-situ remediation technologies such as large environmental disturbances and high costs,and can obtain better remediation performances for non-aqueous organic pollutants.Other remediation techniques like the aeration,blow-off,surfactant,bioremediation,electrochemical remediation,and chemical oxidation were often coupled with the GCW to enhance performances of removing contaminants in groundwater.Researches about the GCW were mainly based on two kinds of methods,the sandbox experiments and simulation methods.According to these two kinds of approaches,the development and research progress of the GCW were described in detail.The mechanism of the GCW coupled with other remediation technologies were emphasized.The influences of different environmental and working conditions on the remediation performance of GCW were also summarized.Considering the current situation of the GCW associated researches in China,coupling with in-situ thermal remediation technologies is promising.Likewise,pilot tests should be conducted with the aim of providing references for the practical application of the GCW in contaminated sites.
groundwater circulation wellsandbox experimentmathematical simulationanalytical methodnumerical model
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