title: Removal of fenhexamid and pyrimethanil from aqueous solutions by clays and organoclays.
abstract: The ability of a sodium montmorillonite (CLONa) and two commercial available organoclays having interlayer organic cations possessing different functional groups (CLO20A and CLO30B) was investigated for adsorbing two pesticides namely fenexamid (FEX) and pyrimethanyl (PMT). The two organoclays displayed a higher affinity with the pesticides than the unmodified clay, but the improvement in adsorption capacity varied according to the characteristics of the pesticide and the interlayer organic cation. FEX was adsorbed to a greater extent than PMT by both organoclays, which may be due to the higher hydrophobicity of FEX thereby indicating considerable hydrophobic interaction between the adsorbent/adsorbate systems. Our findings may find application in the removal of water-soluble pesticides from aquifers.
authors.affiliation: Dipartimento di Scienze Agronomiche, Agrochimiche e delle Produzioni Animali, Sezione di Scienze Agrochimiche, Catania, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Baglieri
authors.forename: Daniela
authors.initials: D
authors.lastname: Borzí
authors.forename: Cristina
authors.initials: C
authors.lastname: Abbate
authors.forename: Michéle
authors.initials: M
authors.lastname: Négre
authors.forename: Mara
authors.initials: M
authors.lastname: Gennari
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D000577:Amides / Q000737:chemistry*; D001546:Bentonite / Q000737:chemistry; D000077215:Clay; D010575:Pesticides / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D000577:Amides; D010575:Pesticides; D011743:Pyrimidines; D014874:Water Pollutants, Chemical; D014867:Water; D001546:Bentonite; C108337:pyrimethanil; C451426:N-(2,3-dichloro-4-hydroxyphenyl)-1-methylcyclohexanecarboxamide; D000077215:Clay