The adsorption and release of sulfur in mineral and organic soils of the Athabasca Oil Sands Region, Alberta, Canada.
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.
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