Adventus Americas Introduces mGCW-R(TM) Technology for In Situ Treatment of Groundwater Impacted by VOCs and Heavy Metals.

BLOOMINGDALE, Ill. -- Adventus Americas Inc. (AAI), in cooperation with GfS mbH, Germany and IEG Technologies GmbH Germany, successfully integrated their proprietary EHC and zero valent iron (ZVI) in situ chemical reduction technologies into microbiologically enhanced Ground Circulation Well (mGCW) systems.

The combined offering, trademarked as "mGCW-R" is a reactive well technology for in situ treatment of soil and groundwater containing a wide range of contaminants, including perchlorate, pesticides, chlorinated solvents along with inorganic compounds (e.g. nitrate, sulfate) and heavy metals (mercury, arsenic and others). This integration of technologies provides significant benefits over conventional nanoscale iron applications proposed for environmental remediation purposes, and it promises to rapidly advance the successful field applications of these exciting nanotechnologies.

Dr. Jim Mueller, president of AAI stated, "One recognized limitation of employing nanoscale ZVI technology in situ is associated with a general inability to introduce and distribute these particles into the environment in a way which maintains their desired reactivity. In most cases, the nanoscale ZVI particles quickly aggregate and precipitate, which greatly reduces their efficacy (i.e., they do not actually migrate with groundwater flow). This diminishes the value of applying expensive nanoscale reagents. Recognizing these limitations, we developed the mGCW-R technology in association with GfS, the world's leader in GCW based systems. We are confident that this unique combination of patented technologies offers site owners, regulators and consultants a new tool to facilitate effective remediation and accelerated closure of some challenging environmental issues".

Dr. Eduard Alesi, president of GfS stated, "The integration of AAI's EHC and ZVI technologies with our superior GCW systems provides a next generation of remedial strategies to address complex environmental challenges throughout the world. We are pleased to combine our knowledge gained from over 600 GCW applications worldwide with the power of the Adventus technologies - interest in applications for these newly integrated technologies is growing very rapidly."

mGCW-R Mode of Action

The mGCW-R system treats soil and groundwater simultaneously. In most cases, no water is removed from the subsurface. By drawing groundwater from an aquifer formation through one screen section of a multi-screened well and discharging it through another, the mGCW-R creates an in situ vertical groundwater circulation cell that serves to distribute reagents; thus, creating an enlarged in situ reactive zone. In addition, the action of groundwater circulation serves to bring contaminants into the reactive zone for continuous, in situ treatment. Given the unique ability to engineer, monitor and control critical operating parameters of the mGCW-R system, we can now most effectively introduce and distribute various remedial catalysts such as EHC and ZVI, and employ less expensive formulations of ZVI (say 1 to 5 micron range).

About The IEG Group

IEG mbH is the world leader in development of groundwater circulation technologies. In 1986, they became a pioneer in the field by developing novel in situ groundwater circulation technologies including the hydraulic calculations for groundwater circulation. The high standard and innovation of the technologies are demonstrated by the fact that they are covered by over 30 international patents. The group's proprietary technologies include: Vacuum Vaporiser Well; Groundwater Circulation Well; Multi-Function Well; Coaxial Groundwater Ventilation; Vacuum Liquid Recovery; Soil Air Venting Screen; Soil Air Circulation Flow; Multi-Level Sampling; Compact Stripper.

IEG Technologie GmbH and GfS mbH are specialist sister companies in the field of innovative in situ soil and groundwater remediation. The companies have extensive experience gained from numerous practical applications combined with the latest knowledge in research and development. The companies have an enviable track record going back nearly 20 years and have conducted several hundred remediation projects across Europe and the United States of America since 1990. The knowledge is reflected by over 100 scientific and technical publications. For more information contact Dr. Eduard J. Alesi at [phone], via email at [e-mail], or online at www.ieg-technologie.com

About The Adventus Group

Adventus Americas Inc. (AAI) is an environmental technology company that provides various remediation biotechnologies including those exclusive to our sister companies, Adventus Remediation Technologies (ART) and EnviroMetal Technologies Inc. (ETI). The group's proprietary technologies include DARAMEND(R) and TERRAMEND(TM) for treatment of soil and sediment, AQUAMEND(R) for wastewater, and ISBS, EHC(TM) technologies and mGCW systems for in situ groundwater treatment. Employees now at Adventus have to date been involved with over 170 successful installations of mGCW systems throughout the United States and Europe. The knowledge accrued through these efforts is reflected, in part, by over 70 scientific and technical publications. ETI is the world leader in applications of permeable reactive barrier (PRB) technology for the remediation of contaminated groundwater, with experience at over 125 sites in United States, Canada, Europe, Japan and Australia. EHC, mGCW and DARAMEND technologies are the subjects of numerous U.S. and international patents.

The Adventus Group network includes field offices in the USA (Colorado, Connecticut, Illinois, New Jersey), Canada (Ontario) and Germany, including an expanding network of international licensees. Additional licensee inquiries are welcome. For more information on The Adventus Group, call [phone] or visit the company's Web sites at www.adventus.us or www.eti.ca