Sole Providers of E-Clay^® Technology

Introduction

The Envirotreat^® Reactive Barrier System incorporates the use of modified pillared E-Clay technology. The Patented E-Clay technology is designed to adsorb and chemically immobilise pollutants of concern within contaminated groundwater.

In its simplest form, the Envirotreat Reactive Permeable Barrier consists of a reactive barrier placed to intercept the flow of contaminated groundwater flow. The barrier is unique in that it consists of the reactive material (modified clays) mixed in-situ with the soils present. As the groundwater passes through the treatment barrier, the contaminants react with the media and are removed resulting in compliant groundwater.

The in-situ reactive permeable barrier technology is recognised as the most effective form of groundwater treatment available. We have successfully treated groundwater contaminated by a wide range of chemicals including the most commonly found problem contaminants in the UK, i.e. hydrocarbons, inorganic pollutants such as ammonium and metallic species (both cationic and anionic).

One of the unique attributes of the technology is its flexibility for application to a range of simple and/or complex contamination issues.

The barrier can be used as a standalone remediation technique of as integral component of a larger remediation strategy.

Key Benefits

The key advantages of this technology are:-

·   The barrier can be designed to effectively treat a wide range of inorganic / organic contaminants;

·   Following installation, the barrier scheme has minimal impact on the site development and does not require above ground infrastructure (as required fro pump and treat systems for example);

·   Once installed the barrier requires no maintenance, the barrier can be designed to last the lifetime of the contamination source with sufficient capacity to effectively treat all identified contamination;

·   The barrier is designed to intercept the natural flow of groundwater and  is designed to have minimal impact on the overall groundwater regime;

·   The implementation is relatively straightforward, there is no need to excavate and therefore dispose of potentially contaminated material;

·   Additions of modified clays are small, less than 4% and mixed with the original soils this results in minimal effects of permeability;

Barrier design. 

Following groundwater modelling of the site we would be able to demonstrate that implementation of a reactive permeable barrier would not adversely affect the overall groundwater regime of the site and that groundwater would preferentially pass through the barrier and not around or over. The barrier is designed to intercept the natural flow of groundwater through the site and this would be supported by suitable groundwater modelling. The Envirotreat Reactive Permeable Barrier is designed to remove contamination from the groundwater to predetermined site specific target levels. The barrier scheme would normally incorporate low permeability sections to channel groundwater towards the reactive sections containing the pillared E-Clays or other treatment media where required. The Envirotreat Reactive Permeable Barrier can be employed to protect off-site receptors or can be used to protect the site from ingress of contaminated groundwater.

An example of a typical site is shown below (incorporating some of the overall design features accompanying the use of this technology)

The schematic shows:-

Treatment of hotspot contamination within the site boundary, with ex-situ or in-situ (as shown) advanced stabilisation, which compliments this technology.

Implementation of an reactive permeable barrier along the site boundary where the groundwater leaves the site, this is a typical installation and the one mostly commonly implemented.

Impermeable barrier to the east of the site barrier to protect a sensitive receptor.

Impermeable barrier to the west of the site barrier to protect the site from a contaminated neighbouring site.

Implementation of a reactive permeable barrier along the site boundary where the groundwater enters the site from a contaminated neighbouring site.

Envirotreat can also provide low permeability barrier schemes as a cost effective alternative to sheet steel piling and cut-off walls.

[ Home ] [ Up ] [ Selected Case Studies ]

Send mail to simon.farr@envirotreat.com with questions or comments about this web site.
Copyright © 2009 Envirotreat Technologies Ltd
Last modified: 01/26/10