Adsorption behavior of 2,4-dichlorophenol and pentachlorophenol in an allophanic soil.
Chemosphere
; 67(7): 1354-60, 2007 Apr.
Article
em En
| MEDLINE
| ID: mdl-17217987
ABSTRACT
The adsorption of 2,4-dichlorophenol (2,4-DCP) and pentachlorophenol (PCP) by a variable-charge soil from southern Chile was studied in a series of batch equilibration experiments. 2,4-DCP and PCP adsorption behavior was evaluated as a function of pH (pH values of 4.5, 6.0 and 7.5) in a 0.1M KCl (25 degrees C) background solution for soil material collected at three different depths (0-20 cm, 20-40 cm, and 40-60 cm). 2,4-DCP and PCP adsorption decreased with increasing soil pH, suggesting that the undissociated species were adsorbed more readily and that electrostatic repulsion may inhibit partitioning as pH increases. The PCP adsorption was greater than observed for 2,4-DCP and decreased with soil depth. Multiple regression analysis between K(d) and various soil properties indicated that the soil organic carbon content is a strong indicator of chlorophenol adsorption, and in addition to organic carbon, the soil pH is an important property controlling adsorption behavior.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pentaclorofenol
/
Poluentes do Solo
/
Clorofenóis
Tipo de estudo:
Diagnostic_studies
País/Região como assunto:
America do sul
/
Chile
Idioma:
En
Ano de publicação:
2007
Tipo de documento:
Article