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The development of waste-based soil-substitutes and soil-forming materials (organic and inorganic amendments) is a sustainable and cost-effective option for significant volumes of organic and inorganic wastes produced by various industries whilst conserving natural resources:
This is an emerging technology that is gaining considerable acceptance due to its success for the treatment of various contaminants and its environmentally friendly principles. Research suggests that particular activities of compost can be enhanced to further increase the effectiveness of this technology.
Some naturally occurring minerals such as clays and zeolites interact with metals to form a matrix in which the bioavailability of the metals is remarkably decreased. This attribute, coupled with the biodegradation capability of the compost, could provide a unique and novel remediation technique. The ultimate goal of the technique is to return the site to its pre-contamination condition and to re-vegetate, to stabilise the treated soil. Novel composts can advance this goal by facilitating plant growth and providing soil conditioning and nutrients to a wide variety of vegetation, as well as reducing bioavailable contaminant levels.
This can be developed to enhance specific attributes, produced from particular feed stocks to increase chemical and biological activity and sorption. Most of the research published in the field is based on the use of ‘un-amended’ composts. The scientific literature also indicates that naturally occurring minerals play a major role in controlling the environmental fate and availability of both organic and inorganic contaminants. We are particularly interested in the improvement of both the metal and organic-binding capacity of composts by the addition of inorganic materials.
This research is being funded by the Engineering and Physical Sciences Research Council (EPSRC) and is being conducted in collaboration with the Universities of Surrey and Cambridge through the SUBR:IM (Sustainable Urban Brownfield Regeneration: Integrated Management) consortium.
Industrial supporters include Thames Water, Terra Eco-Systems, Holliwell Seed and Grain Company Limited and Halcrow Group Ltd.
We conducted research within the EPSRC SUBR:IM consortium designed to:
SUBR:IM Bulletins 10 and 11 are available in the Downloads section, below.
Pitman, R. and Webber, J. (1998). Bracken as a peat alternative. Forestry Commission Information Note, Forestry Commission, Edinburgh.
Ouki, S., van Herwijnen, R., Harbottle, M., Hutchings, T., Al-Tabbaa, A., Johns, M. and Moffat, A. (2007). Novel special-purpose composts for sustainable remediation. In: Sustainable Brownfield Regeneration. Liveable places from problem spaces. (Eds T. Dixon, M. Raco, P. Catney and D. N. Lerner). Blackwells, Oxford.
Moffat, A.J., Hutchings, T., Kilbride, C., Sellers, G., Sinnett, D. and van Herwijnen, R. (2004). Turning brownfields green. Green Places 8, 30-33.
This term has been employed to describe non soil materials used in land reclamation to support vegetation growth. These are usually derived from mineral wastes, such as:
Soil-forming materials must also have the propensity to turn into soils over time, and this process is usually encouraged by treatment to relieve compaction, the incorporation of organic matter such as greenwaste compost, and the choice of appropriate vegetation types that will endure and improve the quality of the substrate.
The majority of Forest Research’s experience of growing trees and other forms of vegetation on reclaimed land has been using soil-forming materials rather than true soil. So significant and successful research campaigns have been achieved on:
Bending, N. A. D., McRae, S. G. and Moffat, A. J. for the Department of the Environment, Transport and the Regions (1999). Soil-forming materials: their use in land reclamation. The Stationery Office, London.
SUBR:IM Bulletin 11 is available in the Downloads section, below.
Ashwood, F.E., Doick, K.J., Atkinson, G.E., Chenoweth, J. (2014). Under-utilisation of organic wastes during brownfield regeneration to community woodland: Tackling the barriers. Waste Management and Research. 32 (1), 49-55. https://doi.org/10.1177%2F0734242X13512717
Use of land degraded by former industrial and urban activity makes an increasingly important contribution to the expansion of woodland. Trees planted on such sites offer immense social benefits in addition to the possibility of economic activity on formerly unproductive land. This programme supports the related objectives of the English Forestry Strategy and across Great Britain generally.
A New Focus for England's Woodlands. Strategic Priorities and Programmes.
CL:AIRE's SUBR:IM bulletins present practical outcomes of research by the SUBR:IM consortium which have direct application to the brownfield and contaminated land communities. This bulletin considers the use of compost in brownfield projects.
CL:AIRE's SUBR:IM bulletins present practical outcomes of research by the SUBR:IM consortium which have direct application to the brownfield and contaminated land communities. This bulletin considers the use of compost in brownfield projects.