title: Chromium Displacement in Subtropical Soils Fertilized with Hydrolysed Leather: A Laboratory Study.
abstract: Prolonged use of biosolids with high metal content may result in diffuse pollution across large regions, especially if such ions can move freely through the soil profile and reach underground water sources. The objective of this study was to verify whether Cr added to the soil surface in the form of hydrolysed leather or a soluble salt would migrate over significant distances in four subtropical soils differing in physical, chemical and mineralogical properties. Horizontal and vertical mobility were assessed in Petri dishes and small pots, respectively, using low (12 mg kg-1soil) and high Cr levels (150 mg kg-1soil) added to the soil surface. Irrespective of concentration, soluble Cr salts were found to move more easily in soils with low organic matter and clay content. Contrarily, Cr added as hydrolysed leather exhibited negligible mobility and tended to accumulate in the vicinity of application.
authors.affiliation: Department of Soils, Federal University of Rio Grande do Sul, Bento Gonçalves Avenue 7712, Porto Alegre, Rio Grande Do Sul, 91540-000, Brazil. jbavaresco@gmail.com.
authors.forename: Jovana
authors.identifier: http://orcid.org/0000-0002-5472-3330
authors.initials: J
authors.lastname: Bavaresco
authors.affiliation: Laboratory of Soils, Federal Institute of Paraná, Bento Munhoz da Rocha Neto Avenue, PRT 280, Palmas, Paraná, 85555-000, Brazil.
authors.forename: Jessé R
authors.initials: JR
authors.lastname: Fink
authors.affiliation: Environmental Protection Foundation of Rio Grande do Sul State, Aurélio Porto Avenue 45, Porto Alegre, Rio Grande Do Sul, 90620-090, Brazil.
authors.forename: Maria Lucia K
authors.initials: ML
authors.lastname: Rodrigues
authors.affiliation: Department of Soils, Federal University of Rio Grande do Sul, Bento Gonçalves Avenue 7712, Porto Alegre, Rio Grande Do Sul, 91540-000, Brazil.
authors.forename: Clesio
authors.initials: C
authors.lastname: Gianello
authors.affiliation: Department of Agronomy, University of Córdoba, C4 Building, Campus of Rabanales, 14071, Córdoba, Spain.
authors.forename: Vidal
authors.initials: V
authors.lastname: Barrón
authors.affiliation: Department of Agronomy, University of Córdoba, C4 Building, Campus of Rabanales, 14071, Córdoba, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Torrent
mesh_terms: D002857:Chromium / Q000032:analysis*; D017608:Chromium Compounds / Q000737:chemistry; D004058:Diffusion; D005308:Fertilizers / Q000032:analysis*; D009566:Nitrates / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis; D013431:Sulfates / Q000737:chemistry
chemical_list: D017608:Chromium Compounds; D005308:Fertilizers; D009566:Nitrates; D012987:Soil; D012989:Soil Pollutants; D013431:Sulfates; D002857:Chromium; C040874:chromium sulfate; C041167:chromium nitrate
keywords: Clay; Environmental contamination; Metal mobility; Organic matter