Author(s)

J. Doumbos

Abstract

The Dolocrete ® Process is an internationally recognised technology which delivers outstanding performance for the chemical fixation and stabilisation of hazardous wastes. Backed by independent academic assessment and regulatory approval in multiple jurisdictions, Dolocrete ® is being used on a commercial scale to treat thousands of tonnes of site remediation soils, dredging sediments, mining wastes and industrial process residues. One significant, signature long term project currently being undertaken by Dolomatrix requires the stabilisation of high level arsenic trioxide (55%) via on-site treatment at a minerals processing facility. Arsenic and other heavy metals represent a key application for the Dolocrete ® Process, with contaminants being incorporated into a pseudo-mineral matrix formed by the reaction of the proprietary Dolocrete ® components. Contaminated soils and sludges containing both organic and inorganic species, and particularly complex wastes containing both, are routinely treated using the Dolocrete ® Process. As an example, contaminated soil from former gasworks sites typically contains cyanide, benzo-a-pyrene (BaP) and other polyaromatic hydrocarbons (PAHs), and heavy metals such as mercury. The Dolocrete ® treatment of such soils offers an economic, reliable means of stabilising the full suite of contaminants in a single step. This paper will detail some of the highly successful applications of the Dolocrete ® Process, both within Australia and internationally. Keywords: treatment, stabilisation, hazardous, toxic, waste, remediation, arsenic, contaminated soils.

Keywords

treatment, stabilisation, hazardous, toxic, waste, remediation, arsenic, contaminated soils.