Adsorption behavior of 2,4-dichlorophenol and pentachlorophenol in an allophanic soil

Cea M.; Seaman, JC; Jara, AA; Fuentes, B.; Mora, ML; Diez, MC

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 0.1 M KCl (25 °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 Kd 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. © 2006 Elsevier Ltd. All rights reserved.

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Título según WOS: Adsorption behavior of 2,4-dichlorophenol and pentachlorophenol in an allophanic soil
Título según SCOPUS: Adsorption behavior of 2,4-dichlorophenol and pentachlorophenol in an allophanic soil
Título de la Revista: CHEMOSPHERE
Volumen: 67
Número: 7
Editorial: PERGAMON-ELSEVIER SCIENCE LTD
Fecha de publicación: 2007
Página de inicio: 1354
Página final: 1360
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0045653506013798
DOI:

10.1016/j.chemosphere.2006.10.080

Notas: ISI, SCOPUS