CONTAMINATED LAND

EDL has substantial infield experience including large scale clean-up of soils contaminated with Persistent Organic Pollutants (POPs) from DDT to Dioxins. All trials and demonstrations to date have established the effectiveness of the MCD process to destroy all POPs in contaminated soils with a high destruction efficiency.

POPs DESTRUCTION

During the MCD process contaminated soil is subjected to high intensity impacts within the reactors. The major regions of chemical reaction initiation are ball-to-ball and ball-to-surface collision points, where soil particles and contaminant molecules are exposed to immense energy densities.

Research to date indicates that the mechanochemical destruction of organic contaminants is complex with two or more parallel reaction mechanisms, involving energetic electrons and excited molecules that form from broken bonds.

Fractured surfaces of the contaminated soil matrix are created by mechanochemical processing leading to highly reactive surfaces. These reactive sites can interact with contaminant molecules that land on them forming contaminant radicals which fragment into smaller ‘daughter’ ions and ultimately neutral species.

We have found that the addition of hard minerals notably enhances destruction efficiency by increasing the overall area of reactive surfaces.


AN INERT END PRODUCT

The primary end products of POPs degraded by MCD are:

Amorphous graphitic carbon residues
Inorganic halides
Halogens sequestered in the powdered final matrix

The final matrix can be reconstituted with soil to grow vegetation or essentially go back into the ground it originated from.

Technology Capabilities

Soil contaminated with POPs listed on the Stockholm Convention (Annex A - C)

Aldrin

Chlordane

Chlordecone

Decabromodiphenyl ether

DDT

Dieldrin

Endosulfan

Endrin

Heptachlor

Hexabromocyclododecane

Hexabromobiphenyl

Hexachlorobenzene

Hexachlorobutadiene

α-Hexachlorocyclohexane

β- Hexachlorocyclohexane

Lindane

Mirex

Octabromodiphenyl ether

Pentachlorobenzene

Pentabromodiphenyl ether

Pentachlorophenol

PFOS / PFOA

Polychlorinated biphenyls

Polychlorinated dibenzo-p-dioxins

Polychlorinated dibenzofurans

Polychlorinated naphthalenes

Short-chain chlorinated paraffins

Toxaphone

Soil contaminated with organochlorine pesticides not listed on the Stockholm Convention
Generic organochlorine pesticides
Soil contaminated with organophosphorus pesticides
Generic organochlorine pesticide

Questions?

Please feel free to contact us if you have any queries.