Back to Search
Start Over
Enrichment and solubility of trace metals associated with magnetic extracts in industrially derived contaminated soils.
- Source :
-
Environmental geochemistry and health [Environ Geochem Health] 2012 Aug; Vol. 34 (4), pp. 433-44. Date of Electronic Publication: 2012 Jan 03. - Publication Year :
- 2012
-
Abstract
- Magnetic fractions (MFs) in industrially derived contaminated soils were extracted with a magnetic separation procedure. Total, soluble, and bioaccessible Cr, Cu, Pb and Zn in the MFs and non-magnetic fractions (NMFs) were analyzed using aqua regia and extraction tests, such as deionized water, toxicity characteristic leaching procedure (TCLP), and gastric juice simulation (GJST) test. Compared with the non-magnetic fractions, soil MFs were enriched with Fe, Mn, Pb, Cd, Cr, Cu, and Ni. Extraction tests indicated that soil MFs contained higher water, TCLP, and GJST-extractable Cr, Cu, Pb, and Zn concentrations than the soil NMFs. The TCLP-extractable Pb concentration in the MFs exceeded the USEPA hazardous waste criteria, suggesting that soil MFs have a potentially environmental pollution risk. Solubility of trace metals was variable in the different extraction tests, which has the order of GJST > TCLP > water. TCLP test showed Cu and Zn were more mobile than Cr and Pb while bioaccessibility of trace metal defined by GJST test showed the order of Cu ≈ Cr ≈ Zn > Pb. These findings suggested that the MFs in the industrially derived contaminated soils had higher possibility of polluting water bodies, and careful environmental impact assessment was necessary.
- Subjects :
- Animals
China
Gastric Juice metabolism
Humans
Magnets chemistry
Metals chemistry
Metals toxicity
Microscopy, Electron, Scanning
Soil Pollutants chemistry
Soil Pollutants toxicity
Solubility
Spectrometry, X-Ray Emission
Trace Elements chemistry
Trace Elements toxicity
Metals analysis
Soil Pollutants analysis
Trace Elements analysis
Subjects
Details
- Language :
- English
- ISSN :
- 1573-2983
- Volume :
- 34
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Environmental geochemistry and health
- Publication Type :
- Academic Journal
- Accession number :
- 22212817
- Full Text :
- https://doi.org/10.1007/s10653-011-9447-6