Investigation of 4-year-old stabilised/solidified and accelerated carbonated contaminated soil

The investigation of the pilot-scale application of two different stabilisation/solidification (S/S) techniques was carried out at a former fireworks and low explosives manufacturing site in SE England. Cores and granular samples were recovered from uncovered accelerated carbonated (ACT) and cement-...

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Bibliographic Details
Published in:Journal of hazardous materials 2010-09, Vol.181 (1), p.543-555
Main Authors: Antemir, A., Hills, C.D., Carey, P.J., Magnié, M-C., Polettini, A.
Format: Article
Language:English
Subjects:
Accelerated carbonation
Applied sciences
Carbonates
Carbonation
Cements
Chemical engineering
Contaminated soil
Copper
Crystallization, leaching, miscellaneous separations
Decontamination. Miscellaneous
Exact sciences and technology
Explosive Agents - chemistry
Fireworks
General treatment and storage processes
Industrial Waste - analysis
Leaching
Lead
Lead (metal)
Metal leaching
Metals, Heavy - analysis
Microstructure
Mineralogy
Pilot Projects
Pollution
Soil (material)
Soil and sediments pollution
Soil Pollutants - analysis
Solidification
Stabilisation/solidification
Trace metals
Wastes
Zinc
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Summary:The investigation of the pilot-scale application of two different stabilisation/solidification (S/S) techniques was carried out at a former fireworks and low explosives manufacturing site in SE England. Cores and granular samples were recovered from uncovered accelerated carbonated (ACT) and cement-treated soils (S/S) after 4 years to evaluate field-performance with time. Samples were prepared for microstructural examination and leaching testing. The results indicated that the cement-treated soil was progressively carbonated over time, whereas the mineralogy of the carbonated soil remained essentially unchanged. Distinct microstructures were developed in the two soils. Although Pb, Zn and Cu leached less from the carbonated soil, these metals were adequately immobilised by both treatments. Geochemical modeling of pH-dependent leaching data suggested that the retention of trace metals resulted from different immobilisation mechanisms operating in the two soils examined.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2010.05.048