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) program was implemented at an operational power generation plant in Northwestern Alberta to remediate F2 and vinyl chloride contamination in 300 m³ of impacted soil. Site constraints, including existing infrastructure and a lack of groundwater, required a 0.75-meter injection radius for increased contact certainty. Over five days, 37 injection points were advanced, delivering 32,800 liters of 12% EHP (enhanced hydrogen peroxide) using TRIUM’s ChemOx® process. The treatment successfully met applicable soil quality guidelines within a short timeframe, with no disruptions to facility operations.
A risk-based in-situ chemical oxidation (ISCO) remediation is ongoing at an urban mall parking lot in Southern Alberta to address a large copper plume in 1,000 m³ of impacted groundwater, with a freshwater receptor located down-gradient. Due to infrastructure constraints, a 5-meter radius injection program using hydrogen peroxide was implemented to catalyze a sequestration reaction and precipitate dissolved copper, forming a permeable reactive barrier to prevent further migration. Over two months, 1 million liters of blended hydrogen peroxide and reagents were injected using TRIUM’s ChemOx® process, ensuring long-term effectiveness with a reactive barrier lasting approximately five years. The remediation has been effective at both the source zone and down-gradient areas, with ongoing injections near the water receptor, achieving results without disrupting shopping center operations.
A pipeline release site in Central Alberta faced residual petroleum hydrocarbon contamination (BTEX, F1, F2) that could not be fully treated with a multi-phase extraction system. Due to site lithology, a risk-based in-situ chemical oxidation (ISCO) approach was implemented with a 1.5 to 2.5 meter injection radius, installing 12 injection wells and injecting 6,500 liters of 12% EHP (enhanced hydrogen peroxide) followed by 3,700 liters of 15% sodium persulfate using TRIUM’s ChemOx® process. The treatment successfully removed all residual NAPL, fully remediated the plume area, and exceeded performance expectations within a short timeframe.
A pipeline release at an active multi-well pad in Central Alberta required remediation due to BTEX, F1, F2, and PAH contamination in 2,000 m³ of impacted soil and groundwater, with remediation timeframes limited by site conditions. A staged risk-based in-situ chemical oxidation (ISCO) approach was implemented with a 3-meter injection radius, involving the installation of 52 injection wells and five permeable reaction trenches to facilitate groundwater extraction and oxidant circulation. A total of 17,500 liters of 12% EHP (enhanced hydrogen peroxide) was injected using TRIUM’s ChemOx® process, with injections timed during frost-cap months to maintain pressure. Results show a well-defined and shrinking plume, significant source area concentration reductions, and an approximate 90% decrease in PHC and PAH concentrations since project inception.
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 UST (underground storage tank) spill. The remediation approach included customized oxidant blending, targeted field applications, and performance monitoring to effectively break down contaminants. Using TRIUM’s advanced chemical oxidation process, the treatment was designed to minimize disruption to the residential area while achieving rapid and effective remediation. The project successfully met regulatory guidelines, ensuring a safe and clean environment.
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