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Journal of Environmental Science and Health, Part B
Pesticides, Food Contaminants, and Agricultural Wastes
Volume 44, 2009 - Issue 3
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ARTICLES

Removal of fenhexamid and pyrimethanil from aqueous solutions by clays and organoclays

Andrea Baglieri Dipartimento di Scienze Agronomiche, Agrochimiche e delle Produzioni Animali, Sezione di Scienze Agrochimiche, Catania, Italy
,
Daniela Borzí Dipartimento di Scienze Agronomiche, Agrochimiche e delle Produzioni Animali, Sezione di Scienze Agrochimiche, Catania, Italy
,
Cristina Abbate Dipartimento di Scienze Agronomiche, Agrochimiche e delle Produzioni Animali, Sezione di Scienze Agrochimiche, Catania, Italy
,
Michéle Négre Dipartimento di Valorizzazione e Protezione delle Risorse Agroforestali, Settore di Chimica agraria, Torino, Italy
&
Mara Gennari Dipartimento di Scienze Agronomiche, Agrochimiche e delle Produzioni Animali, Sezione di Scienze Agrochimiche, Catania, Italy
Pages 220-225 | Received 29 Aug 2008, Published online: 11 Mar 2009
 
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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.

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