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The adsorption and release of sulfur in mineral and organic soils of the Athabasca Oil Sands Region, Alberta, Canada.
Whitfield, C J; Adkinson, A; Eimers, M C; Watmough, S A.
Afiliação
  • Whitfield CJ; Environmental and Resource Studies Dep., Trent University, Peterborough, ON, K9J 7B8, Canada. cwhitfield@trentu.ca
J Environ Qual ; 39(3): 1108-12, 2010.
Article em En | MEDLINE | ID: mdl-20400606
Mineral soil and fibric peat from acid-sensitive western boreal catchments in the Athabasca Oil Sands Region of Alberta, Canada were evaluated for their ability to adsorb and release SO(4)(2-). Laboratory batch studies indicated that SO(4)(2-) adsorption in mineral soil from both the A and B horizons exhibits a limited response to elevated SO(4)(2-) concentrations, with the slope of initial mass isotherms <0.2 for all soils, likely due to low iron and aluminum oxide content. Although S retention is the dominant process in peat soils in the region, drought simulations in the lab using fibric peat collected from a poor fen exhibited as much as a five-fold increase in SO(4)(2-) concentration after drying and rewetting. Given the limited SO(4)(2-) adsorption capacity of mineral soils and the potential drought-induced S release from peatlands in this region where increased S deposition is expected, further investigation of acidification impacts is warranted.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Solo / Enxofre / Minerais País/Região como assunto: America do norte Idioma: En Revista: J Environ Qual Ano de publicação: 2010 Tipo de documento: Article País de afiliação: Canadá

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Solo / Enxofre / Minerais País/Região como assunto: America do norte Idioma: En Revista: J Environ Qual Ano de publicação: 2010 Tipo de documento: Article País de afiliação: Canadá