Major element, trace element, nutrient, and radionuclide mobility in a mining by-product-amended soil

Douglas, G., Adeney, J., Johnston, K., Wendling, L. and Coleman, S. (2012) Major element, trace element, nutrient, and radionuclide mobility in a mining by-product-amended soil. Journal of Environmental Quality, 41 6: 1818-1834. doi:10.2134/jeq2012.0139


Author Douglas, G.
Adeney, J.
Johnston, K.
Wendling, L.
Coleman, S.
Title Major element, trace element, nutrient, and radionuclide mobility in a mining by-product-amended soil
Journal name Journal of Environmental Quality   Check publisher's open access policy
ISSN 0047-2425
1537-2537
Publication date 2012-11-01
Year available 2012
Sub-type Article (original research)
DOI 10.2134/jeq2012.0139
Volume 41
Issue 6
Start page 1818
End page 1834
Total pages 17
Place of publication Madison, WI United States
Publisher American Society of Agronomy, Inc.
Collection year 2013
Language eng
Formatted abstract
 This study investigates the use of a mineral processing by-product, neutralized used acid (NUA), primarily composed of gypsum and Fe-oxyhydroxide, as a soil amendment. A 1489-d turf farm field trial assessed nutrient, trace element, and radionuclide mobility of a soil amended with ~5% by mass to a depth of 15 cm of NUA. Average PO4-P fluxes collected as subsoil leachates were 0.7 and 26.6 kg ha-1 yr-1 for NUA-amended and control sites, respectively, equating to a 97% reduction in PO4-P loss after 434 kg P ha-1 was applied. Total nitrogen fluxes in NUA-amended soil leachates were similarly reduced by 82%. Incorporation of NUA conferred major changes in leachate geochemistry with a diverse suite of trace elements depleted within NUA-amended leachates. Gypsum dissolution from NUA resulted in an increase from under- to oversaturation of the soil leachates for a range of Fe- and Ca-minerals including calcite and ferrihydrite, many of which have a well-documented ability to assimilate PO4-P and trace elements. Isotopic analysis indicated little Pb addition from NUA. Both Sr and Nd isotope results revealed that NUA and added fertilizer became an important source of Ca to leachate and turf biomass. Th e NUA-amended soils retained a range of U-Th series radionuclides, with little evidence of transfer to soil leachate or turf biomass. Calculated radioactivity dose rates indicate only a small increment due to NUA amendment. With increased nutrient, trace element, and solute retention, and increased productivity, a range of potential agronomic benefits may be conferred by NUA amendment of soils, in addition to the potential to limit offsite nutrient loss and eutrophication
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Agriculture and Food Sciences
 
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Created: Fri, 31 Jan 2014, 16:39:50 EST by Laura Wendling on behalf of School of Agriculture and Food Sciences