Abstract
As a new in-situ remediation of groundwater, compared with the traditional “pump and treat” technology, the permeable reactive barrier (PRB) has the advantages of low cost, no external power, the small disturbance to groundwater, small secondary pollution and long-term operation, this paper introduces the basic concept of PRB, technical principle, structure type, the principle of active materials selection and mechanisms of remediation, design and installation factors, it provides ideas for further research and application of PRB technology in groundwater remediation projects in China.
Highlights
2.1 Technical principle of PRB Permeable reactive barrier (PRB) technology mainly intercepts groundwater pollution plumes by installing reactive barrier filled with permeable active materials downstream of groundwater flow, so that pollutants can adsorb, precipitate, redox and biodegrade with active materials in the reaction barrier, and remove or transform pollutants in groundwater, so as to achieve the purpose of groundwater remediation
The reactive barrier can fully react with the active materials; the second is that the reactive barrier can not block up during operation and has good permeability; the third is that the reactive barrier can completely intercept groundwater pollution plume and prevent groundwater pollution plume from passing under the reactive barrier
As a new remediation technology of in-situ groundwater pollution, PRB compared with others, does not need to extract groundwater from the ground for treatment, disturb the flow of groundwater, and does not need continuous external power in the operation process
Summary
2.1 Technical principle of PRB Permeable reactive barrier (PRB) technology mainly intercepts groundwater pollution plumes by installing reactive barrier filled with permeable active materials downstream of groundwater flow, so that pollutants can adsorb, precipitate, redox and biodegrade with active materials in the reaction barrier, and remove or transform pollutants in groundwater, so as to achieve the purpose of groundwater remediation
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