Formentini, Thiago
- Department of Soil and Environment, Swedish University of Agricultural Sciences
- Federal University of Santa Maria (UFSM)
Abstract
Zinc (Zn) occurs naturally in soils, but spreading Zn-rich livestock manure on agricultural soils may lead to hazardous Zn levels. Interactions between exogenous Zn (from animal manure) and the soil matrix must be assessed to predict its behavior. We conducted soil density fractionation using sodium polytungstate solutions (LST) to isolate and identify the soil constituents and investigated their associations with Zn within five density fractions by characterizing the total organic carbon (TOC), mineralogy and Zn speciation. We analyzed a clayey Hapludox soil from a field experiment that had received pig slurry applications over an 11-year period, causing a 2-fold increase in the Zn concentration within the 0-5 cm layer relative to the control soil. Two density fractions with contrasting compositions were found: (i) a light fraction (
Keywords
Heavy metal; Soil contamination; Agricultural recycling; Pig slurry
Published in
Geoderma
2021, volume: 394, article number: 115044
Publisher: ELSEVIER
SLU Authors
Global goals (SDG)
SDG12 Responsible consumption and production
UKÄ Subject classification
Soil Science
Publication identifier
- DOI: https://doi.org/10.1016/j.geoderma.2021.115044
Permanent link to this page (URI)
https://res.slu.se/id/publ/111984