title: Removal of pentachlorophenol from aqueous solutions by dolomitic sorbents.
abstract: The partial decomposition of dolomite carried out within the temperature range 600-1000 degrees C provides new sorbents, called dolomitic sorbents. Their surface properties and identification by X-ray diffraction are discussed. The lowest specific surface area value was found for the raw dolomite, while the highest value was achieved by the D-1000 sample. The adsorption equilibrium of pentachlorophenol from aqueous solutions on the examined sorbents was investigated at 30, 40, and 50 degrees C via a bath process. Langmuir, Freundlich, Langmuir-Freundlich, and Redlich-Petersen models were fitted to experimental equilibrium data, and their goodnesses of fit are compared. The adjustable parameters of Langmuir-Freundlich and Redlich-Petersen isotherms were estimated by nonlinear least-squares analysis. Langmuir and Freundlich models were found insufficient to explain the adsorption equilibrium, while Langmuir-Freundlich and Redlich-Petersen isotherms provide the best correlation of the pentachlorophenol adsorption onto dolomitic sorbents.
authors.affiliation: Laboratoire SEA2M, Centre Universitaire de Mascara, Algeria.
authors.forename: Reda
authors.initials: R
authors.lastname: Marouf
authors.forename: Noreddine
authors.initials: N
authors.lastname: Khelifa
authors.forename: Kheira
authors.initials: K
authors.lastname: Marouf-Khelifa
authors.forename: Jacques
authors.initials: J
authors.lastname: Schott
authors.forename: Amine
authors.initials: A
authors.lastname: Khelifa