Using Solidification/Stabilisation (S/S)
Environment Agency
Environment Agency Publication - Guidance on the use of Stabilisation/Solidification for the Treatment of Contaminated Soil.
Source: www.environment-agency.gov.uk science report SC980003/SR1
Model Procedures for Managing Contaminated Land
Environment Agency
Government policy recognises that when, in deciding whether contamination matters, the amount of contaminants present does not provide the whole answer. It is necessary to consider to what extent the substances present may harm human health or the wider environment. In short, what risk, if any, is caused by contaminants, and is that risk unacceptable? Therefore, the overall approach in dealing with past land contamination is one of risk management.
Source: www.environment-agency.gov.uk Contaminated Land Report 11
Scientific Research Studies into Solidification/Stabilisation
Environment Agency
S/S binders and reagents are used to ‘cement’ contaminated materials together to enable re-use in a beneficial way, or disposal. Binders impart both chemical stability and physical solidity to the treated product. The high pH induced by the addition of cement binders results in the precipitation of many contaminant species and a corresponding reduction in mobility (stabilisation). Secondly, the ability of the binder to set into a solid mass encapsulating the contaminant results in a physical immobilisation process (solidification). Binders can be divided into two groups; primary stabilising agents and secondary stabilising agents and their properties and interaction with soils are described. It should be noted that the stabilisation of contaminants in a bound system does depend, to a greater or lesser degree, on the speciation of the contaminants involved.
Source: www.environment-agency.gov.uk science report SC980003/SR2
CASSST Guidance on Solidification Stabilisation use in the UK
In collaboration with the British Cement Association, Environment Agency, Arup Environmental and other leading organisations, the Centre for Contaminated Land Remediation (CCLR) has been instrumental in developing National guidance for the s/s of contaminated land. This has been achieved through the CASSST project, which started on July 1st 2000 and has resulted in the production of National Guidance on S/S.
Sourced from: www-starnet.eng.cam.ac.uk CL:AIRE TECHNICAL BULETIN TB9 (JUNE 2004)
Remediating Brownfield Land
The Concrete Centre
The cost and logistical problems involved in dig and dump mean that S/S is a cost effective and sustainable alternative, with the added advantage of being able to handle a wide range of contaminants. S/S facilitates ground remediation either by destroying the contaminants, or rendering them immobile and virtually non-leachable. In short, S/S removes pathways between contaminants and potential receptors, thereby eradicating associated risk.
Source: www.concretecentre.com Ref: TCC/02/03 Remediating Brownfield Land