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Simultaneous remed...
Simultaneous remediation of explosives and lead from contaminated soil by pH-adjustment
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- Elgh-Dalgren, Kristin, 1980- (author)
- Örebro universitet,Akademin för naturvetenskap och teknik,MTM Research Center
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- Düker, Anders (author)
- Örebro universitet,Akademin för naturvetenskap och teknik,MTM Research Center
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- Allard, Bert (author)
- Örebro universitet,Akademin för naturvetenskap och teknik,MTM Research Center
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- van Hees, Patrick (author)
- Örebro universitet,Akademin för naturvetenskap och teknik,MTM Research Center
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(creator_code:org_t)
- English.
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- Soil washing with pH-adjusted water was evaluated in two soils containing different concentrations of heavy metals and explosives. Overall, the most efficient treatment was with water adjusted to pH 12 by NaOH. For explosives, pH 12 removed significantly higher amounts (P<0.05) of RDX and TNT compared to pH 4 (adjusted with HNO3) and distilled water in a moderately contaminated soil (230 mg HMX/kg, 1340 mg RDX/kg, 450 mg TNT/kg). In a more highly contaminated soil (6080 mg HMX/kg, 28740 mg RDX/kg, 3120 mg TNT/kg), the pH 12-treatment was the most efficient for removal of TNT and 2,4-DNT. Explosives removal increased with treatment time, probably due to the kinetically slow processes underlying the explosives degradation. Mobilization of heavy metals was strongly dependent on pH, with pH 12 mobilizing more than pH 3. In addition, the change in distribution coefficient (Kd) was more pronounced for local contaminants Pb and Cd in comparison with Cu and Zn, which were present in background concentrations.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- Environmental chemistry
- Miljökemi
- Enviromental Science
- Miljövetenskap
Publication and Content Type
- vet (subject category)
- ovr (subject category)
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