Groundwater is the water found below the ground in rocks and soil. It is an important source of fresh water and it is used for drinking, farming and industry. However, it can become polluted by factors such as chemicals, pesticides, fertilisers and leaks from landfill sites.
What is groundwater remediation?
Groundwater remediation, like the examples seen here, https://soilfix.co.uk/services/groundwater-remediation/, is the process of cleaning polluted groundwater. The aim is to remove harmful substances or make them safe so the water can be used again.
Extraction and disposal
This method removes polluted water from the ground using wells or boreholes. The water is then taken to a licensed treatment centre where it can be cleaned or safely disposed of.
Pump and treat
Pump and treat is one of the most common methods. The polluted water is pumped to the surface and cleaned using special filters or other treatment equipment. It can then be returned to the ground or safely released.
Chemical oxidation
This method uses special chemicals to break down harmful pollutants in the water. It can also help clean polluted soil around the groundwater.
Air sparging
Air sparging pumps air into the groundwater. This helps remove fuels and oil while also helping natural bacteria break them down faster.
Soil vapour extraction
This method uses a vacuum to remove harmful gases from contaminated soil and groundwater. It is usually used alongside other methods to make the clean-up more effective.