At DeltaNova we know that a one-size-fits-all approach doesn’t work in remediation.
That’s why we offer a versatile range of products and technologies, customizing the most effective solutions to meet the specific needs of your site.

With our proven eco-friendly technologies, you can reduce uncertainty, mitigate risks, and achieve cost-effective results.

Explore our most popular products by treatment category and discover the best fit for your remediation needs.

In Situ Chemical Reduction (ISCR)

Treatment description

ISCR is an advanced environmental remediation technique that treats contaminated soil and groundwater by introducing a reductant or reductant-generating material into the subsurface, allowing the reduction of targeted contaminants to safe levels.

Among the most effective reductants, Zero-Valent Iron (ZVI) is known for its effectiveness in removing a wide range of persistent organic compounds (mainly chlorinated aliphatic hydrocarbons, PCBs, and pesticides) by breaking them down into harmless end products. ZVI also treats inorganic contaminants (especially heavy metals), through precipitation and sorption processes.

In particular, ZVI is extensively employed for the remediation of chlorinated ethenes.

The reductive dechlorination of chlorinated ethenes follows two primary pathways:

  • Abiotic Degradation – It is the dominant degradation pathway in presence of ZVI, which donates electrons, breaking down contaminants through β-dichloroelimination. This process minimizes the formation of harmful intermediates like vinyl chloride.
  • Biotic Degradation – This biological process is sustained by molecular hydrogen (H2) generated by ZVI in water. This H2 serves as an electron donor, enhancing microbial activity and facilitating the stepwise replacement of chlorine (Cl) atoms by hydrogen through enzymatic reactions.

Abiotic and Biotic Degradation Pathways of Chlorinated Ethenes

IronGEL™

Engineered to be field effective

IronGEL features

In our quest for high-performance and sustainable in-situ remediation, we have developed cutting-edge products incorporating nano and microparticles of ZVI (nZVI and mZVI) in engineered formulations, which are directly injected in the contaminated subsoil, forming reactive zones that effectively remove pollutants.

DeltaNova’s designed cutting-edge nanoremediation solutions enhance treatment effectiveness while minimizing the costs and time needed for restoration. The reactive agents, in fact, are directly injected in the contaminated subsoil, forming reactive zones that effectively remove pollutants.

The inclusion of engineered, eco-friendly biopolymers in IronGEL’s formulation allows the creation of a viscoelastic gel that exhibits shear-thinning behavior upon dilution in water. The unique formulation of IronGEL results in high colloidal stability, quick mixing, and smooth injection with wide subsurface distribution.

IronGEL product

IronGEL™

 Mixes instantly. Stays stable.

IronGEL features

 

IronGEL™

One smart solution, infinite benefits


Broad-spectrum reducing action with high reactivity towards contaminants

✓

Proven effectiveness in treating a wide range of persistent organic compounds and inorganic contaminants.

Targets:

 
  • chlorinated ethenes
  • chlorinated aliphatic compounds
  • pesticides
  • PCBs
  • heavy metals
  • and many more

Optimized stability and mobility

IronGEL diagram

Engineered biopolymers give IronGel its viscoelastic, shear-thinning properties, ensuring high colloidal stability, easy injection and broad distribution in the subsoil.

IronGEL™

One smart solution, infinite benefits

Optimal for in field-application
  • Stable concentrated suspensions (45-50% ZVI) for easy on-site preparation.
  • The enhanced radius of influence (ROI=3÷7m) allows for a substantial reduction in the number of injection points

Maximized coverage. Minimized disruption.

Commodity mZVI vs IronGEL coverage

Stimulation of the biodegradation

Biodegradation stimulation diagram

The injection of IronGel enhances microbial activity and supports co-injection with organic substrates and for long-lasting biodegradation

Discover the IronGEL™ family

Explore our range of IronGEL solutions, featuring customized particle sizes and
formulations to suit the unique hydrogeological profile of your site.


IronGEL™
IronGEL-S
IronGEL Nano-S
IronGEL Nano/mix

IronGEL pouring

 

IronGEL™

Composition: microparticles of ZVI (<10 µm)

Rapid initiation of reductive process

Quickly lowers aquifer REDOX
potential down to -350 mV or less

Rapid initiation - Redox reduction

for effective ISCR of chlorinated
solvents and redox-sensitive metals

High reactivity for fast contaminant breakdown

High reactivity chart

Proven and rapid dehalogenation of
chlorinated solvents, treating from DNAPL
hotspots to diffuse plume zones

Full dechlorination and long lasting eremediation effect

Validated long-term effectiveness, with over a year of field-proven results.

POST INJECTION MONITORING

Significant production of ethane (final product of the reductive dehalogenation process) also after 20 weeks from the injection

Water and time icon

 

IronGEL Nano-S

Composition: microparticles of ZVI (<100 nm)

Extreme reactivity and fast kinetics

Extreme reactivity and fast reaction kinetics thanks to nanoparticles

Extreme reactivity and fast kinetics

High selectivity

Enhanced selectivity for PCE and TCE degradation

High selectivity for PCE and TCE degradation

Extended longevity

Minimizing corrosion means longer-lasting performance from the active reagent.

Extended longevity

Optimized stability and subsurface mobility

Optimized stability and subsurface mobility

Engineered biopolymers give IronGel its viscoelastic, shear-thinning properties, ensuring high colloidal stability, easy injection and broad distribution in the subsoil.

 

IronGEL Nano/mix

Composition: composite mixture of multi-sized ZVI particle (50 nm – 50 µm)

Fast intial reactivity

Fast intial reactivity thanks to nanoparticles

Fast initial reactivity icon

Sustained long-term action

Microparticles enable extended activity over time

Sustained long-term action icon

Effective against wide range of contaminants

The tailored mixture of multi-sized ZVI particles enables effective remediation across a broad spectrum of contaminants

Effective across broad spectrum icon

Enhanced Anaerobic Reductive Bioremediation

Anaerobic reductive bioremediation is a process that involves introducing biologically available organic amendments, known as organic substrates or electron donors, into groundwater.

These amendments serve a dual purpose:

1

Stimulating microbial activity

2

Creating and sustaining anoxic conditions by consuming oxygen and other electron acceptors through aerobic respiration.

In this anaerobic conditions, the hydrogen produced by fermentation reactions acts as an electron donor, promoting the bioreduction of oxidized contaminants, which function as electron acceptors. This is especially effective for chlorinated solvents.

 

 

 

The Emulsified vegetable oil (EVO) is an amendment used as electron donor for anaerobic reductive bioremediation.

EVO slowly ferments and acts in the subsurface as an organic carbon and hydrogen source that stimulates organohalide-respiring bacteria that in turn mineralize chlorinated solvents.

Indigenous microorganisms first consume and ferment EVO to generate hydrogen, fatty acids and other important nutrients and cofactors.
The prevailing anaerobic conditions are ideal to reduce chlorinated solvents like TCE through dechlorination processes such as dehaloelimination.

Then specialized bacteria such as Dehalococcoides mccartii, Dehalobacter, or Dehalogenomonas use subsurface-generated hydrogen when transforming reduced solvent to innocuous ethene.

Discover Tersus Enhanced Anaerobic Reductive Bioremediation products

Tersus bioremediation amendments are formulated to optimize in situ remediation of contaminated soil and groundwater.

Emulsified Vegetable Oils (EVO)

EDS-ER™

EDS-ER™ is a long-lasting electron donor that has revolutionized the field when released in 2011.
As the first water-mixable vegetable oil-based organic substrate, EDS-ER™ provides a
long-lasting source of carbon and hydrogen, enhancing
reductive dechlorination and bioremediation processes.

Shipped as a 100% fermentable substrate concentrate, it creates optimal conditions for anaerobic remediation.
Composed of refined, bleached, and deodorized soybean oil with
TASK™ MicroEVO Self-Emulsifier surfactants, EDS-ER™ spontaneously transforms into
an emulsified vegetable oil (EVO) when mixed in water.

EDS-ER™ powerful benefits for sustainable remediation:

  • Effortlessly mixes with water, forming a low-droplet size emulsion, simplifying field operations
  • Spontaneously forms a superior quality emulsion that easily and uniformly disperses in the aquifer
  • Slowly ferments, acting as a long-term electron donor, releasing electrons for up to five years
  • Lower environmental cost:
    • Up to 50% less packaging material required
    • Lower carbon footprint

EVO emulsifiers

TASK™ MicroEVO™ Self Emulsifier

Product video

Product datasheet



Download PDF

Soluble electron donors and nutrients

It is EtOH/MeOH alcohol blend consisting of ethanol, methanol, and n-propyl alcohol.

EDS-Substrate Shuttle™


Product datasheet

It is a water-miscible solvent that efficiently dissolves the vegetable oil, creating a solution with the distribution properties of a soluble electron donor.

Soluble electron donor formulated for efficient distribution and enhanced performance in anaerobic remediation applications.

Nutrimens® Liquid & Granular


Product datasheet

Nutrient amendments (liquid and granular) designed to support microbial activity and optimize in situ bioremediation performance.

 

CATALYZED Reductive Bioremediation

To optimize the distribution of fatty acids in the aquifer and to tackle the issue of biofouling, the team of surfactant specialists at Tersus has harnessed their expertise to develop EDS-Advanced™. The procedure behind this innovative technique involves the introduction of a water-soluble mixture of oil (e.g., EDS-ER™) and alcohol (e.g., EDS-Substrate Shuttle™, EDS-ME™, etc.) along with a homogeneous alkaline catalyst (EDS-Activator™).

As shown in the figure, this process triggers in situ transesterification of vegetable oils. The fatty acids are cleaved from the triglyceride molecule and subsequently bind to the alkyl group of the alcohol to produce fatty acid alkyl esters, carboxylic acids/salts, and glycerol.

In situ transesterification of vegetable oils

Key benefits provided by EDS-Advanced™
  • Higher mobility and dispersion of the obtained solution in aquifers and subsurface environments compared to traditional EVO.
  • Improved distribution of fatty acids within the subsurface.
  • Natural buffering capacity.
  • Reduced operational issues, including biofouling, clogging and saponification.
  • Wider radius of influence (ROI) from each injection point, thanks to the ease of distribution.
  • Fewer injection points required to adequately supply a contaminated aquifer with the necessary electron donor.

Remarkable efficacy

Up to 90% reduction in contaminants within 90 days

Recent fieldwork conducted both in the United States and Australia has provided compelling evidence of EDS-Advanced™’s remarkable efficacy.
It has demonstrated the ability to reduce up to 90% of contaminant mass within a mere 90-day post-injection, showcasing the tremendous potential of this innovative solution for subsurface remediation.

Enhanced Anaerobic Oxidative Bioremediation

Overview

Enhanced anaerobic bioremediation includes two main types: reductive bioremediation, a well-established technology primarily used to treat chlorinated compounds, and oxidative bioremediation, which is employed to target petroleum hydrocarbons.

Oxidation serves as the primary metabolic pathway for the biodegradation of petroleum hydrocarbons. This process involves the transfer of electrons from
the petroleum hydrocarbon, acting as an electron donor, to another compound acting as an electron acceptor.

Anaerobic oxidation occurs when compounds like sulfate act as electron acceptors. The availability of sulfate often limits the naturally occurring biodegradation of petroleum hydrocarbons.

Nevertheless, it is feasible to accelerate natural biodegradation rates by supplementing additional sulfate (i.e., Nutrisulfate®) and nutrients (i.e., TersOx™ Nutrients-QR) to the subsurface microbial community.

Enhanced Anaerobic Oxidative Bioremediation products

Nutrisulfate®

Nutrisulfate® is a high-sulfate metabolic supplement designed to enhance the kinetics and efficiency of microbial systems specifically tailored for the
biodegradation of BTEX, MTBE, TBA, and other petroleum hydrocarbons. Following the revitalization of previously limited sulfate levels, anaerobic groundwater bacteria utilize petroleum hydrocarbons for carbon and energy, ultimately mineralizing the hydrocarbons into carbon dioxide and water.
The increase in kinetics and efficiency decreases remediation times and reduces the amount of substrate/amendment required.
Nutrisulfate® is suitable for easy injection and distribution, poses no adverse effects, and supports clean, cost-effective, non-disruptive applications for direct-push points and injection wells.

TersOx™ Nutrients-QR

TersOx™ Nutrients-QR is a water-soluble nutrient blend formulated to support anaerobic oxidation of petroleum hydrocarbons by strengthening the subsurface microbial community. It helps provide essential macro- and micronutrients that can be limiting in groundwater, improving overall biological activity and process stability when used alongside sulfate-based electron acceptors (e.g., Nutrisulfate®). The result is more consistent performance, improved kinetics and a more reliable pathway toward complete biodegradation in the treatment zone.

Enhanced Aerobic Biodegradation

Overview

Enhanced aerobic biodegradation is the practice of adding oxygen to saturated soil and groundwater to encourage and sustain the growth of microorganisms required for in situ bioremediation of contaminated groundwater. It is typically used to treat low to moderate levels of hydrocarbon contamination.

Enhanced Aerobic Biodegradation products

TersOx™ Powder

TersOx™ Powder is a crafted calcium peroxide formulation engineered to deliver a controlled release of molecular oxygen. Tailored to support aerobic biodegradation efforts in both soil and groundwater, TersOx™ Powder plays a pivotal role in fostering the natural degradation of hydrocarbons.
Specifically designed for the breakdown of petroleum hydrocarbons, it stands out as a catalyst for enhanced biodegradation processes.
Unlike chemical oxidation products, TersOx™ Powder harnesses its high oxygen content—exceeding 16.6% by weight—to establish a sustained oxygen supply lasting up to 12 months under optimal conditions. The protracted release of oxygen not only acts as a continuous energy source but also supports indigenous bacteria, ultimately expediting bioactivity and enabling more efficient and thorough contaminant removal.

In situ chemical oxidation (ISCO)

Overview

Through collaborative efforts with clients, Tersus offers expertise in determining the most suitable oxidant(s) for a specific site.
Additionally, Tersus assists in calculating the required oxidant load and conducts Total Oxidant Demand (TOD) testing, considering dissolved contaminants, adsorbed contaminants, free-phase contaminants, dissolved and solid-phase reduced minerals, and naturally occurring organic material.
Tersus specializes in utilizing an advanced suite of ISCO products, including a modified Fenton’s reagent and persulfate.

ISCO products

TersOx™ Modulator

TersOx™ Modulator consists of a surfactant-based hydrogen peroxide stabilizer. Co-injected with hydrogen peroxide, it gradually generates hydroxyl free radicals, reducing oxygen demand, eliminating high contaminant inhibition, and enhancing bioremediation performance by directing biological activity towards contaminant breakdown.

TersOx™ – NPS (Sodium Persulfate)

TersOx™ – NPS represents the strongest oxidant within the peroxygen family for in situ remediation of volatile and semi-volatile organic compounds.
Activating NPS with heat or a base generates sulfate radicals, highly reactive and effective in degrading organic compounds in water or soil through oxidation reactions.

Surfactant Enhanced Aquifer Remediation

Overview

Surfactant-enhanced aquifer remediation (SEAR) stands as a cost-effective alternative to traditional pump-and-treat methods for remediating aquifers tainted by non-aqueous phase organic liquids.

SEAR products

Description

Tersus holds the global distribution rights for the foremost surfactant technology, TASK™ (Tersus Advanced Surface Kinetics), and associated products, encompassing techniques for in situ surfactant application and chemical oxidation. Benefiting from nearly two decades of research and testing conducted at the University of Oklahoma, TASK™ Anionic Surfactant Blend presents a versatile array of applications specifically tailored to hydrocarbon contamination flushing.