Persulfates for soil and groundwater remediation

Daramend® Reagent

Daramend® Reagent represents a superior 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

EXAMPLE CONTAMINANTS

  • Organic explosives
  • Chlorinated VOCs
  • Chlorinated pesticides

Key functions

  • In situ landfarming
  • Shallow groundwater trench applications

Technology: IN SITU CHEMICAL REDUCTION

In situ chemical reduction (ISCR) is the combination of abiotic chemical reduction, using zero valent iron(ZVI) and/or reduced minerals (magnetite, pyrite), coupled with anaerobic bioremediation for the effective treatment of chlorinated solvents, pesticides, and energetics. Physical, chemical, and biological processes combine to create an extremely reduced environment that stimulates chemical and microbiological dechlorination of otherwise persistent compounds.

Technical bulletins

This document summarizes our experience treating organochlorine pesticides (OCPs) in soil and groundwater using Daramend® and EHC® Reagents.

Daramend® application guides

Common approaches utilizing Daramend® as a cost effective solution for excavation backfills and trench style PRB applications.

Daramend® webinars

Dr. Alan Seech explains how Daramend® Reagent controls soil chemistry to foster chemical and microbiological processes that enhance the anaerobic destruction of key explosive compounds and their degradation products.

Dr. Alan Seech presents the original in situ chemical reduction technology based on Daramend® Reagent. Case studies show the advantages of this effective and cost-efficient technique compared to other soil remediation methods.

Dr. Alan Seech provides an overview of the chemistry of the ISCR process for treating pesticides using a cyclic, anaerobic/aerobic approach. A key advantage of this ISCR treatment is its ability to meet even the most stringent residential remediation criteria.

Dr. Alan Seech will provide an overview of Evonik's reagents for in situ and ex situ remediation of soils contaminated with organic explosives and organic compounds. He will present the benefits, composition, treatment chemistry and applicability for remediating soil contamination of the Daramend® family, as well as results from completed projects where Daramend® has been used to effectively remediate soils.

Evonik’s laboratory created the KLOZUR® field test kit to provide a quick and reliable measurement of persulfate in the field.

There are two different kits available, depending on the activation method used. Each kit is capable of running ten tests and has a measurement range of 1g/L to 100g/L, with a theoretical accuracy of ±1g/L and ±2g/L respectively.

Contact and further information