Adsorption of imidazolinone herbicides on ferrihydrite-humic acid associations. |
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| Authors: | P Leone M Nègre M Gennari V Boero R Celis J Cornejo |
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| Affiliation: | Università degli Studi di Torino, Dipartimento di Valorizzazione e Protezione delle Risorse Agroforestali, Chimica Agraria, Italy, Grugliasco. |
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| Abstract: | Adsorption of the imidazolinone herbicides imazapyr, imazethapyr and imazaquin was studied on two binary systems (ferrihydrite-humic acid) prepared by treating ferrihydrite (Fh) immediately after its precipitation with a soil humic acid (HA) at different loadings (4% and 8% HA content), and on a blank ferrihydrite sample prepared in the same way, but without HA addition. Imidazolinone adsorption on pure Fh and on the 4% Fh-HA decreased with increasing of the herbicide hydrophobicity (imazaquin
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