Hydrogen Equivalents: Comparison of Simple Electron Donors to EHC In-Situ Chemical Reduction (ISCR) Reagents
Biodegradation via reductive dechlorination processes occurs when microbes directly remove chlorine atoms from a chemical in order to derive energy from other organic compounds. This occurs under reducing, anaerobic conditions. A more effective remedial strategy, however, entails in situ chemical reduction (ISCR) using EHC as the reductant. As described herein, EHC™ is the patented combination of controlled-release carbon plus micro-scale zero valent iron (ZVI) particles used for stimulating in situ chemical reduction of otherwise persistent organic compounds in groundwater. Various formulations of Adventus’ carbon + ZVI materials have been used to treat over 3,000,000 tons of soil/sediment and millions of gallons of groundwater impacted by recalcitrant compounds. Both EHC (for groundwater) and DARAMEND (for soils) are proven, established technologies that have been used at hundreds of field sites to date throughout North America and accepted by many Federal, State, and regional regulator authorities within the USA/Canada, Europe, and Asia.