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how are the organic contaminants (NAPLS:non aqueous phase liquid) distributed in soil?

how are the organic contaminants (NAPLS:non aqueous phase liquid) distributed in soil?

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Answer #1

Firstly there are two types of NAPL (non aqueous phase liquid)

- LNAPL (Light Non-aqueous phase liquid) lighter than water For example: Benzene a, petroleum etc.

- DNAPL (Dense Non-aqueous phase liquid) Denser than waterFor example: Coal tar,Chlorinated Hydrocarbon Trichloroethylene (Solvent) etc.

The organic contaminants like NAPLs is insoluble in water and immiscible hydrocarbon in the subsurface which would easily distributed in soil and also paritially dissolved in the groundwater at a much slower rate and causes soil pollution.

NAPLs form a visible, separate oily phase in the subsurface of the soil and distribution of NAPLs complex migration governed by buoyancy, gravity, and capillary forces, and also according to the soil texture.

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