| Title: | Nanoengineered Sorbents To Increase the Persistence of the Allelochemical Carvone in the Rhizosphere |
| Author(s): | Gamiz B; Facenda G; Celis R; |
| Address: | "Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS), CSIC , Avenida Reina Mercedes 10 , 41012 Sevilla , Spain" |
| ISSN/ISBN: | 1520-5118 (Electronic) 0021-8561 (Linking) |
| Abstract: | "This study investigates the changes in sorption/desorption, dissipation, and leaching of the two enantiomeric forms of the allelochemical carvone, R-carvone and S-carvone, after amending an agricultural soil sample with two nanoengineered sorbents: biochar (BC) and organoclay (OCl). The sorption of carvone enantiomers was nonenantioselective and similarly improved by the addition of OCl and BC to the soil. However, OCl-amended soil showed reversible sorption, whereas BC-amended soil displayed sorption-desorption hysteresis. Dissipation of carvone enantiomers was enantioselective. Both amendments increased the half-life of the enantiomers in the soil. This effect was more pronounced for BC-amended soil and for S-carvone. Leaching of R- and S-carvone through soil columns was scarce in unamended soil (<7%), due to their rapid degradation during leaching, and null for OCl- and BC-amended soil, for which much of the applied R- and S-carvone remained in the top 0-5 cm of the amended soil layer. Addition of biochars and organoclays could help increase the persistence of carvone enantiomers in the rhizosphere, which may favor their use as residual pest-management substances" |
| Keywords: | Adsorption Charcoal/chemistry Clay/chemistry Cyclohexane Monoterpenes Monoterpenes/*chemistry Nanotechnology Pheromones/*chemistry Rhizosphere Soil/chemistry Soil Pollutants/*chemistry biochar biopesticides chiral pesticides monoterpenes organoclays soil; |
| Notes: | "MedlineGamiz, Beatriz Facenda, Gracia Celis, Rafael eng 2018/12/19 J Agric Food Chem. 2019 Jan 16; 67(2):589-596. doi: 10.1021/acs.jafc.8b05692. Epub 2019 Jan 2" |
