Soluble metal pool as affected by soil addition with organic inputs

Hernandez-Soriano, Maria C., Peña, Aránzazu and Mingorance, Maria Dolores (2013) Soluble metal pool as affected by soil addition with organic inputs. Environmental Toxicology and Chemistry, 32 5: 1027-1032. doi:10.1002/etc.2159


Author Hernandez-Soriano, Maria C.
Peña, Aránzazu
Mingorance, Maria Dolores
Title Soluble metal pool as affected by soil addition with organic inputs
Journal name Environmental Toxicology and Chemistry   Check publisher's open access policy
ISSN 0730-7268
1552-8618
Publication date 2013-05
Sub-type Article (original research)
DOI 10.1002/etc.2159
Volume 32
Issue 5
Start page 1027
End page 1032
Total pages 6
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Collection year 2014
Language eng
Formatted abstract
The potential impact of diverse inputs of organic matter (hay, maize straw, and peat) on the mobility and bioavailability of Cd, Cu, Pb, and Zn was examined at laboratory scale for three soils with contrasting properties and for two moisture regimes: field capacity and saturated conditions. Soil solution was characterized for total soluble metals, dissolved soil organic carbon, and ultraviolet absorbance at 254 nm. Speciation analyses were performed with WHAM VI. For field capacity conditions, metal mobility increased (Pb > Cu > Zn > Cd) for all soils and treatments compared with controls and was significantly correlated (p < 0.05) with dissolved organic matter (r = 0.540). Solubilization of organic matter was mostly driven by Al mobilization (r = 0.580, p < 0.05) and variations in solution pH. The bioavailable pool of metals, estimated as free ion activities, decreased with the increasing occurrence of metal–organic matter complexes, which was accompanied by an increase in solution of highly aromatic organic matter. Soil saturation generally decreased metal mobility and the ratio of metal–organo matter complexes in solution. Consistently, such effects were accompanied by a decrease in the solubilization of organic matter and lower mobilization of Al, Fe, and Mn.
Keyword Organic amendment
Free ion activity
Soil solution
Metal bioavailability
Soluble organic matter
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: Mon, 06 Jan 2014, 04:13:31 EST by Maria Hernandez-soriano on behalf of School of Agriculture and Food Sciences