title: Improving of understanding of beta-hexachlorocyclohexane (HCH) adsorption on activated carbons by temperature-programmed desorption studies.
abstract: In order to understand the interactions between beta-hexachlorocyclohexane (HCH) and chemical groups at activated carbon (AC) surface, the solid samples were hydrogenated aiming to decrease the amounts of oxygenated groups. Two AC samples designated by BagH2O and BagP1.5 were prepared by water vapor activation and phosphoric acid activation, respectively, of sugarcane bagasse used as an AC precursor. A more simple molecule 1,2,3-trichloropropane (TCP) is used as a model of chlorinated compound. The AC were characterized by infrared, X-ray photoelectron spectroscopy (XPS), Raman resonance spectroscopies, as well as temperature-programmed desorption coupled with mass spectrometry (TPD-MS). BagP1.5 and BagH2O AC surface contained oxygenated groups. Upon hydrogenation, a decrease of most of these group amxounts was observed for both samples, while hydroxyl groups increased. On the basis of temperature-programmed desorption data obtained for AC samples contaminated with TCP or HCH, it was possible to determine the type of hydrogen bond formed between each AC and HCH.
authors.affiliation: Laboratoire COVACHIM-M2E, EA 3592 Université des Antilles et de la Guyane, BP 250, 97157, Pointe à Pitre Cedex, Guadeloupe, France. npasseco@univ-ag.fr.
authors.forename: Nady
authors.initials: N
authors.lastname: Passé-Coutrin
authors.affiliation: Laboratoire COVACHIM-M2E, EA 3592 Université des Antilles et de la Guyane, BP 250, 97157, Pointe à Pitre Cedex, Guadeloupe, France.
authors.forename: Laetitia
authors.initials: L
authors.lastname: Maisonneuve
authors.affiliation: Laboratoire COVACHIM-M2E, EA 3592 Université des Antilles et de la Guyane, BP 250, 97157, Pointe à Pitre Cedex, Guadeloupe, France.
authors.forename: Axelle
authors.initials: A
authors.lastname: Durimel
authors.affiliation: Institut de Sciences des Matériaux de Mulhouse, UMR CNRS 7361,15 rue Jean Starky, B.P.2488, 68057, Mulhouse Cedex, France.
authors.forename: Joseph
authors.initials: J
authors.lastname: Dentzer
authors.affiliation: Institut de Sciences des Matériaux de Mulhouse, UMR CNRS 7361,15 rue Jean Starky, B.P.2488, 68057, Mulhouse Cedex, France.
authors.forename: Roger
authors.initials: R
authors.lastname: Gadiou
authors.affiliation: Laboratoire COVACHIM-M2E, EA 3592 Université des Antilles et de la Guyane, BP 250, 97157, Pointe à Pitre Cedex, Guadeloupe, France.
authors.forename: Sarra
authors.initials: S
authors.lastname: Gaspard
mesh_terms: D000327:Adsorption; D002482:Cellulose; D002606:Charcoal / Q000737:chemistry; D001556:Hexachlorocyclohexane / Q000737:chemistry*; D006860:Hydrogen Bonding; D056951:Photoelectron Spectroscopy; D011407:Propane / Q000031:analogs & derivatives / Q000737:chemistry; D013696:Temperature
chemical_list: D002606:Charcoal; C009536:1,2,3-trichloropropane; D001556:Hexachlorocyclohexane; D002482:Cellulose; C027433:bagasse; D011407:Propane; C023888:beta-hexachlorocyclohexane
keywords: Activated carbon; Hexachlorocyclohexane; Hydrogenation; Surface functional groups; Temperature programmed desorption; Trichloropropane