Remediation Reagents
Greenment is the general agent of EnviroChem Beijing in eastern China for sale of the following soil and groundwater remediation reagents.
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In-situ Chemical Oxidation(ISCO

In-situ chemical oxidation (ISCO) is the introduction of an oxidant into the subsurface for the purpose of oxidizing contaminants in soil and groundwater. ISCO is ideal for the elimination of contaminant concentrations in source zones and hot spots.

Klozur® Persulfate

Klozur® persulfate is the oxidant of choice for ISCO, because of its ability to treat a wide range of contaminants including chlorinated solvents, petroleum and PAHs. When properly activated, Klozur persulfate provides an unmatched combination of oxidative power and control that can be delivered both safely and cost effectively.

Successful field applications of Klozur activated persulfate have been performed globally. These applications demonstrate the ability of Klozur activated persulfate to treat diverse organic contaminants of concern including: chlorinated ethenes, chlorinated ethanes, chlorinated methanes, BTEX, MTBE, polyaromatic hydrocarbons, petroleum hydrocarbons, 1,4-dioxane and pesticides.

Key Benefits:

  • Powerful multi-radical attacks
  • Rapid destruction of recalcitrant compounds
  • Flexible activation based on site conditions
  • Highly soluble (up to 40 wt%)
  • Persistent in the subsurface

klozur CR®

Klozur® CR is a single, formulated product consisting of alkaline activated Klozur® Persulfate and PermeOx® Ultra engineered calcium peroxide, uniting the strengths of both products to treat contaminant source zones and down-gradient plumes.

Klozur CR is formulated to provide a self-activated persulfate oxidation system which couples chemical oxidation with aerobic and anaerobic bioremediation processes that can last up to one year after application.

Klozur® CR can be utilized as a combined remedy for the treatment of BTEX, MTBE, PAHs and petroleum hydrocarbons, or as an alkaline activated persulfate system for the destruction of chlorinated solvents and pesticides. As a result, the product can be readily applied to either source areas or plumes with mixed petroleum and chlorinated solvents contamination.

Key Benefits:

  • Self-activating persulfate oxidation
  • Generates powerful sulfate and hydroxyl radicals
  • Rapid in-situ chemical oxidation
  • Extended oxygen release for up to one year
  • Enhanced aerobic bioremediation in down gradient plumes
  • No chemicals to mix

In situ Chemical Reduction (ISCR) / Anaerobic Bioremediation Technology

EHC®

EHC is composed of controlled-release carbon, zero valent iron (ZVI) particles and nutrients used for stimulating in situ chemical reduction (ISCR) of otherwise persistent organic compounds in groundwater. Following placement of EHC into the subsurface environment, a number of physical, chemical and microbiological processes combine to create very strong reducing conditions that stimulate rapid and complete dechlorination of organic solvents and other recalcitrant compounds (e.g., explosives and organochlorine pesticides).

Key Benefits:

  • Stimulation of both abiotic and biotic reductive dechlorination
  • Demonstrated longevity of 4-5 years in field conditions
  • Combined approach minimizes the production of problematic daughter products, such as DCE and VC
  • ZVI corrosion (alkaline) and fermenting carbon (acidic) are balanced producing circum neutral pHs in contrast to either alone
  • Non-hazardous and safe to handle

EHC-L®

EHC® Liquid ISCR reagent is a concentrated, buffered, microemulsion of a controlled-release, food-grade carbon, nutrients, and iron designed for on-site dilution with cold water.

It is a liquid variant of PeroxyChem’s EHC® ISCR Reagent and is specially designed for injection via existing wells or hydraulic injection networks for the treatment of a wide range of groundwater contaminants. EHC Liquid is composed primarily of ELS™ Microemulsion, a controlled-release organic carbon substrate and EHC Liquid mix, an organo-ferrous compound (both food-grade). The anaerobic bioremediation processes and abiotic dechlorination reactions promoted by EHC Liquid are effective at remediating chlorinated solvents, energetics, and pesticides/herbicides.

Key Benefits:

  • Stimulation of both abiotic and biotic dechlorination mechanisms
  • Structurally bound nutrients phosphorous and nitrogen released to bacteria
  • Anticipated longevity of 2-3 years depending on site conditions
  • Easy to handle and cold water soluble

 

Daramend®

Daramend® anaerobic bioremediation reagent represents a superior biological treatment technology for solid materials impacted by recalcitrant organic compounds. Since the first application in 1996, variations of the technology have been successfully used to treat >10,000,000 tons of soil, sediment and other solid materials.

Daramend® treats soils containing chlorinated herbicides and pesticides, organic explosive compounds, and chlorinated VOCs (CVOCs) at many sites throughout the world. The Daramend® technology is uniquely advantageous because: it can often be applied without excavation; its implementation generates no odors or leachate; and it is typically applied at 1 to 3% (soil mass), so it does not result in soil bulking.

Key Benefits:

  • Improves soil health - tilth and fertility - reduces toxicity
  • Hydrophilic character increases soil water holding
  • Balanced range of nutrients
  • Promotes remediation of most persistent contaminants in soils

Aerobic Bioremediation

Aerobic bioremediation is the addition of oxygen and nutrients to accelerate naturally occurring bioremediation through natural biological processes. The process helps facilitate the conversion of biodegradable compounds to CO2 and H2O.

Terramend®

Terramend® aerobic bioremediation reagent represents a superior biological treatment technology for solid materials impacted by recalcitrant organic compounds.

Since the first application in 1991, variations of the technology have been successfully used to treat >10,000,000 tons of soil, sediment and other solid materials. Terramend treats soils containing polycyclic aromatic hydrocarbons (PAHs), phthalates, and chlorophenols (including pentachlorophenol) at many sites throughout the world.

Terramend technology is uniquely advantageous because: i) it can often be applied without excavation, ii) implementation generates no odors or leachate, and iii) being typically applied at 1 to 3% (soil mass), it does not result in soil bulking.

An independent audit conducted by the U.S. EPA concluded that the technology represented a safe, effective and cost-efficient means of treating soils (US EPA/540/R-95/536 July, 1996).

Key Benefits:

  • Hydrophilic Character
  • Balanced Range of Nutrients
  • Improved Ecology
  • Accelerated Treatment

PermeOx® Ultra

PermeOx® Ultra, the evolution PermeOx® Plus, is a specially formulated grade of engineered calcium peroxide providing extended oxygen release for enhanced aerobic bioremediation.

Studies have shown that PermeOx Ultra releases more oxygen into the subsurface environment over extended periods as compared to other soil remediation products. PermeOx Ultra can continually release oxygen for over 350 days, thus providing a useful and cost-effective tool for enhancing the aerobic bioremediation of petroleum hydrocarbons and some non-halogenated organics.

PermeOx Ultra is formulated to contain at least 18% Available Oxygen (AO), a measure of how much oxygen is available to be released. This compares favorably to the AO levels found in typical calcium peroxide and magnesium peroxide based oxygen release products that are subject to lock up/encapsulation. This means that on a pound to pound basis, PermeOx Ultra is able to deliver more oxygen.

Key Benefits:

  • Microbes use organic carbon (COC/COI) and oxygen as a terminal electron acceptor
  • Contains >18% Active Oxygen, which is higher than other grades of calcium peroxide
  • Releases oxygen for up to one year, which is the longest oxygen release profile of similar products in the market

Stabilization

EHC®-M Reagent

EHC® Metals Reagent is a remediation product for immobilization of metals combining controlled-release carbon, micro-scale zero-valent iron & a slow-release of sulfate.

Following placement of EHC Metals Reagent into the saturated zone, a number of chemical and microbiological processes combine to create strongly reducing conditions under which a number of heavy metals are sequestered via reductive precipitation as scarcely soluble metal-sulfides and via adsorption onto secondary ZVI corrosion products. A wide range of chlorinated volatile organic compounds (CVOCs) are also degraded in these reduced environments, allowing for treatment of mixed plume impacts.

Key Benefits:

  • Immobilization of metals
  • Limits movement of metals in groundwater
  • Mixed plume treatment
  • Non-hazardous and safe to handle

ISGS™ (In-situ stabilization reagent)

In Situ Geochemical Stabilization (ISGS™) technology utilizes a permanganate-based solution to geochemically stabilize dense non-aqueous phase liquids (DNAPL) in the aquifer.

Permanganate and other proprietary reagents are mixed into an aqueous solution that can be injected into an aquifer either through existing wells or direct push technology. As the solution migrates through the treatment area it oxidizes contaminants yielding partial mass removal. The ISGS technology also reacts with contaminants in the treated area thereby coating NAPL surfaces with stable mineral precipitates that reduce mass flux.

Key Benefits:

  • Prevents contaminants from leaching into environment
  • Application and treatment can be done in situ
  • Can be more cost effective and efficient than conventional cement stabilization

Enhanced anaerobic bioremediation

ELS™

ELS™ Microemulsion is a lecithin-based substrate of food-grade carbon used to enhance anaerobic bioremediation.

ELS creates reducing conditions and serves as an electron donor for dechlorinating bacteria, promoting enhanced reductive dechlorination reactions. ELS is delivered as a 25% liquid emulsion that is cold water soluble and can be applied via existing wells, hydraulic injection networks, or direct push technology. Lecithin is composed primarily of phospholipids, which have both hydrophilic and hydrophobic regions in their molecular structure. As a result, ELS can be expected to form a more stable emulsion compared to oils that are strictly hydrophobic compounds, making it easy to apply and handle.

Key Benefits:

  • Stimulation of biotic reductive dechlorination
  • Structurally bound nutrients phosphorous and nitrogen released to bacteria via the fermentation of the lecithin molecule
  • Forms stable emulsions
  • Easy to handle and cold water soluble