Groundwater Treatment and Control
Protecting our most important resource
Groundwater treatment is an important process to ensure it is safe for humans as well as minimizing the impact that contaminants may pose to the environment. This treatment also includes the remediation of soil and sediment should they be contaminated as a result of coming into contact with contaminated groundwater. Our products provide solutions to help protect the environment and our health.
Ex Situ and In Situ treatment options
Groundwater treatment can take place two ways. It can be treated off-site, Ex situ, or on-site, In situ. Ex situ includes the excavation of the contaminated area and treating it at another location. In situ is the process of treating the water on location instead of hauling it to another site for treatment. Because of the high swelling capacity of VOLCLAY bentonite sealants, only small amounts are needed to reduce the hydraulic conductivity of the on-site soils.
Permeable Reactive Barrier (in situ treatment)
With this process Permeable Reactive Barriers (PRB) will be installed across the flow path of a contaminated groundwater. As it flows through the PRB, contaminants are either degraded or retained in a concentrated form by the reactive material.
Our manufacturers Organoclay products are used for control of non-aqeuous phase liquid (NAPL). In a variable PRB, the Organoclay adsorbs the NAPL and creates a low permeable zone that retards the NAPL layer. Zones above DNAPL layers and below LNAPL layers remain permeable to groundwater flow, thus preventing groundwater mounding. Their Organoclay products can also adsorb low-soluble dissolved organics in groundwater.
Slurry walls (in situ treatment)
A second In situ treatment option are slurry walls, these are a non-structural, low permeability vertical barrier used to stop the flow of groundwater. They can be an effective groundwater and source control remedy for almost any location. High quality sodium bentonite from our product manufacturer lowers the hydraulic conductivity of the slurry wall and can be used for both soil-bentonite and cement-bentonite slurry walls.
Pump and Treat (ex situ treatment)
While granular activated carbon (GAC) is proven to be effective at adsorbing dissolved organics from contaminated groundwater, it can be fouled by NAPL. As a result, our filtration media can improve the efficiency of activated carbon filtration systems.
Several of our Organoclay vessels can be placed in series prior to the GAC vessel to strip the NAPL before it reaches the GAC or as a post-treatment. By incorporating this into your ex situ pump & treat system, you can significantly extend the life of the GAC, resulting in reduced replacement and disposal costs.