Chemical oxidation, commonly referred to as Chemox, is a robust remediation technology employed to degrade a wide spectrum of environmental contaminants in soil and groundwater. This process involves introducing strong oxidizing agents that react with pollutants, transforming them into less harmful compounds, thereby mitigating environmental hazards.
Transform Contaminated Sites – Effectively and Safely
At TRIUM Environmental, we bring cutting-edge Chemical Oxidation (Chemox) technology to life. Designed for the rapid and effective degradation of contaminants, Chemox is your solution for transforming polluted soil and groundwater into safe, sustainable resources.
In Chemox remediation, oxidizing agents such as hydrogen peroxide, permanganate, or persulfate are introduced into the contaminated medium. These agents generate reactive species, notably hydroxyl radicals (·OH), which are highly effective in breaking down complex organic molecules. The general reaction can be represented as:
Contaminant + Oxidant → Oxidized By-products (e.g., CO₂, H₂O)
The selection of the appropriate oxidant is critical and depends on factors such as the type of contaminant, site conditions, and remediation goals.
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Chemical reactions occur swiftly, often reducing contaminant concentrations in a matter of weeks to months.
Chemox can be applied directly to the contaminated site, minimizing the need for excavation or transport of hazardous materials.
Chemox is effective against a wide range of organic contaminants.
Evaluating site-specific parameters to determine the most effective oxidizing agents and delivery methods.
Developing site-specific remediation plans that consider the nature and extent of contamination, hydrogeology, and regulatory requirements.
Utilizing state-of-the-art injection methods to ensure optimal distribution and contact between oxidants and contaminants.
Implementing rigorous monitoring protocols to assess treatment efficacy and ensure the achievement of remediation goals.
At TRIUM Environmental, we have extensive experience in designing and implementing Chemox remediation strategies tailored to the unique conditions of each site. This is because this technology is a trademark of Trium Environmental Inc. and so we surpass all other service providers for Chemox.
Our team of experts is dedicated to employing the latest advancements in chemical oxidation to provide efficient, cost-effective, and environmentally responsible remediation solutions. By leveraging our deep understanding of Chemox technology, we help clients navigate complex environmental challenges and achieve regulatory compliance.
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Chemox is versatile and can address various contaminants, including:
Such as benzene, toluene, ethylbenzene, and xylenes.
Including trichloroethylene (TCE) and tetrachloroethylene (PCE).
Such as atrazine and alachlor.
Including phenols and polycyclic aromatic hydrocarbons (PAHs).
A closure-based in-situ chemical oxidation (ISCO) remediation was conducted at a former gas station in Southern Alberta to address BTEX, F1, F2, and PAH contamination in 6,630 m³ of impacted soil, bedrock, and groundwater, including off-site impacts beneath residential properties. Due to infrastructure constraints and vapour risks, a Remediation Train® approach was implemented, starting with a soil vapour extraction (SVE) and air sparge system, followed by a ISCO program with a 3-meter injection radius. Nested injection wells targeted various depth intervals, with careful scheduling around residential activity. Over 45 days, 1.6 million liters of 10% EHP (enhanced hydrogen peroxide) was injected using TRIUM’s ChemOx® process, achieving daily blend volumes of >35,000 L. The treatment successfully met regulatory groundwater quality guidelines, managed vapour risks, and was recognized as an industry-leading process by consultants, with no negative impact on the community.
An in-situ chemical oxidation (ISCO) remediation was conducted at a residential property in North Vancouver to address petroleum hydrocarbons (LEPH), phenanthrene, and pyrene contamination in 200 m³ of impacted soil and groundwater following a heating oil UST leak that migrated under the building foundation, causing vapour intrusion and free product in property sumps. A 2.5-meter injection radius was used for targeted treatments within the basement and exterior property foundation, utilizing directional injections and drive-points to reach both saturated and unsaturated zones. TRIUM leveraged the property’s sump system to artificially raise the groundwater level, creating a fully saturated treatment zone. Over seven days, 24 basement injections and 3 exterior injections delivered 20,104 litres of sodium persulfate, blended using TRIUM’s TriOx process with specialized activation products. The treatment successfully met regulatory soil, groundwater, and vapour guidelines, required only six weeks for completion, and allowed the property owner to safely return home with minimal disturbance.
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