Cleanit for removal of soil contamination
Different methods for removing soil contamination
Underground injection means directly injecting relatively fine ZVI media with a chemical mix (containing carbon source, pH buffer, etc.) into underground soil. Soil blending is done by mechanically blending the surface or shallow subsurface soil with ZVI media along with the chemical mix.
Another method used for in-situ remediation is permeable reactive barrier (PRB). Contaminated groundwater passes through the PRB (a trench filled with course ZVI media) naturally, and the contaminants are captured/removed by the PRB.
In terms of groundwater remediation, pump-and-treat is commonly used as an ex-situ treatment method. Contaminated groundwater is pumped out, and treated through vertical columns packed with ZVI media.
Three different methods: Underground injection, Mechanical soil blending, Permeable reactive barrier
The Cleanit way to remove soil contamination
Cleanit media can be applied for all of the methods described due to the flexible particle size range and high reactivity. Currently, Cleanit SI is available for soil injection, Cleanit SB is for soil blending, and Cleanit SR is designed for PRB application. Höganäs provides a customized ZVI for each customer and in the particle distribution range they require, such as less than 10 µm, 45 µm or 100 µm for Cleanit SI.