Once these iron walls are placed in the soil how long is it before they need to be replaced

The installation of the conventional non-nano iron wall has lasted for some time. There are a good number of iron walls that have worked for more than 10 years.

We expect that the nanoparticle iron wall installation will not last very long, because the nanoparticles are so small that they will be used up in a short time. Therefore, it is difficult to estimate how long the nanoparticle iron wall will last. Our best estimate is that the nanoparticle iron wall will probably last only for a few months. The goal of the nanoparticle iron wall is to knock out the contaminants quickly.

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