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Influence of soil biochar aging on sorption of the herbicides MCPA, nicosulfuron, terbuthylazine, indaziflam, and fluoroethyldiaminotriazine

AutorTrigo, Carmen ; Spokas, K. A.; Cox, L. ; Koskinen, W. C.
Palabras claveIndaziflam
Biochar
Aging
Nicosulfuron
MCPA
Terbuthylazine
Fecha de publicaciónoct-2014
EditorAmerican Chemical Society
CitaciónJournal of agricultural and food chemistry 62: 10855- 10860 (2014)
Resumen© 2014 American Chemical Society. Sorption of four herbicides and a metabolite of indaziflam on a fresh macadamia nut biochar and biochars aged one or two years in soil was characterized. On fresh biochar, the sorption was terbuthylazine (Kd = 595) > indaziflam (Kd = 162) > MCPA (Kd = 7.5) > fluoroethyldiaminotriazine (Kd = 0.26) and nicosulfuron (Kd = 0). Biochar surface area increased with aging attributed to the loss of a surface film. This was also manifested in a decline in water extractable organic carbon with aging. Correspondingly, an increase in the aromaticity was observed. The higher surface area and porosity in aged biochar increased sorption of indaziflam (KdBC-2yr = 237) and fluoroethyldiaminotriazine (KdBC-1yr = 1.2 and KdBC-2yr = 3.0), but interestingly decreased sorption of terbuthylazine (KdBC-1yr = 312 and KdBC-2yr = 221) and MCPA (KdBC-1yr = 2 and KdBC-2yr = 2). These results will facilitate development of biochars for specific remediation purposes.
Descripción6 páginas.-- 3 figuras.-- 3 tablas.-- 22 referencias
Versión del editorhttp://dx.doi.org/10.1021/jf5034398
URIhttp://hdl.handle.net/10261/115811
DOI10.1021/jf5034398
Identificadoresdoi: 10.1021/jf5034398
issn: 1520-5118
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