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Immobilisation and Solidification PDF Print E-mail

The DoloMatrix group of companies provides specialist services in the immobilisation of inorganic and organic contaminants in a wide variety of situations.

Chemical Immobilisation is the rendering of a contaminant into a non-leachable and non-bioavailable form.  Solidification is a process in which a physical matrix of a waste is solidified via the addition of a pozzolanic agent.  

Dolocrete®

Dolocrete®, a patented, magnesium oxide-based binder, is employed exclusively by Entech Industries in a wide range of solidification applications. A great number of hazardous waste types are effectively treated using Dolocrete®, including:

  • Heavy metal-contaminated soils and sludges
  • Total petroleum hydrocarbon (TPH) contaminated soils and sludges
  • Coal tars and soils contaminated by coal tars
  • Cyanide and fluoride contaminated soils and sludges
  • Pesticide contaminated soils
  • Acid sulphate soils

    • The technology has been used very successfully to treat wastes generated by:

  • The petroleum refining and petrochemical industries
  • Smelting, metallurgical and electroplating plants
  • The mining industry
  • Rifle ranges
  • Chemical treatment
  • Paper manufacturing industries

    • Dolocrete® is also extremely effective in the treatment of sludges from rivers, harbours and lakes.

    Chemical Fixation

    Entech Industries and DoloMatrix have extensive experience in the all aspects of chemical fixation projects and have successfully completed a very substantial number of such projects, a sample of which are summarised in the table below:

    Project Services Provided Outcome
    Coal tar contaminated soils from Steel Street gasworks Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Mine arsenic trioxide waste Developed and implemented a chemical fixation and solidification treatment technology The project resulted in WA DEC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Coke oven gas residues (PAH, B(a)P, CN, Hg, TPH) Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Coal tar contaminated soils (PAH's, CN and phenols) Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Char Waste
    (PAHs including B(a)P, and TPH)     		Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    AFU waste (TPH, PAHs and BTEX) Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Diamond mine waste (tetrabromoethane, tribromoethane) Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Arsenic and lead contaminated soil and tailings from a former silver mine Performed a chemical fixation and solidification project for the treatment of of arsenic and lead contaminated soil The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Pesticide contaminated soil,
    chlorpyrifos, triclopyr, picloram, fluoxypyr, 2,4-D, xylenes, trichloroethanes           		Developed a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Coal tar contaminated waste from Abbotsford gas works (B(a)P, PAHs) Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Copper chrome arsenate (CCA) waste (As, Cr6+) Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Rare earth contaminated residues from a mineral processing operation in Malaysia Developed a chemical fixation and solidification treatment technology The application will allow the company to reuse the treated residue for a geotechnical stablilisation application
    Mercury contaminated brine Waste Developed a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval
    Mercury contaminated soil Developed and implemented a chemical fixation and solidification technology for the proposed treatment of mercury contaminated soil Commercial scale treatment was undertaken.
    Fluoride impacted aluminium wastes Prepared a NSW DEC Immobilisation Approval application This resulted in NSW DEC approving an Immobilisation Approval and waste being disposed of in NSW
    Electric arc furnace dust (Pb, Cd) Developed a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval
    2000 tonnes of coal tar contaminated soil from the former Katoomba gas works Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Lead contaminated soil Developed a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval
    Liquid Waste Treatment facility Prepared an EPA Immobilisation Approval application for Transpacific Industries for their This resulted in DECC issuing a draft Immobilisation Approval for the treatment of the residues generated from the treatment facility
    Coal tar impacted soils Developed and implemented a chemical fixation and solidification treatment technology for the treatment of coal tar impacted soils The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    200 tonnes of nickel contaminated filter cake Developed and implemented a chemical fixation and solidification treatment technology The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval
    Polyaromatic impacted pitch residues from the aluminium industry Developed and implemented a chemical fixation and solidification treatment technology for the treatment of 200 tonnes of polyaromatic impacted pitch residues from the aluminium industry The project resulted in NSW DECC issuing an Immobilisation Approval and the material being successfully treated and disposed of in accordance with the approval