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Title

Dynamic Effect of Fresh and Aged Biochar on the Behavior of the Herbicide Mesotrione in Soils

AuthorsGámiz, B. ; Velarde Muñoz, Pilar ; Spokas, K. A.; Cox, L.
KeywordsBiodegradation
Bound residues
Desorption
Leaching
Organic amendments
Soil weathering
Issue Date28-Aug-2019
PublisherAmerican Chemical Society
CitationJournal of Agricultural and Food Chemistry 67(34): 9450-9459 (2019)
AbstractIn this study, we assessed the sorption, dissipation, and leaching of the herbicide mesotrione in soil amended with fresh and field-aged biochars, when added to the soil. The aging process was performed by burying the fresh biochar at 10 cm depth in three soils located in different points across the USA [Wisconsin (ABC_WI), Idaho (ABC_ID), and South Carolina (ABC_SC)] for six months. ABC_ID and ABC_SC slightly increased the sorption of mesotrione in soils, whereas ABC_WI removed greater amounts of herbicide from the solution. This was attributed to differences in water-soluble components and metal content of this aged biochar. Consequently, the persistence of the herbicide in the amended soils with fresh biochar and ABC_ID and ABC_SC were similar to that in unamended soils, while ABC_WI slightly increased mesotrione half-life. Differences between treatments were detected in leaching studies although no direct relationship with the dissipation batch studies was observed. Mesotrione leaching could not be detected in soil columns amended with ABC_WI and was high for the rest of treatments. The outcomes from this work demonstrate that temporal variability of biochar sorption capacities due to soil exposure can occur altering mesotrione’s behavior in biochar-amended soils.
Description10 páginas.- 6 figuras.- 5 tablas.- 57 referencias.- The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.jafc.9b02618
Publisher version (URL)http://dx.doi.org/10.1021/acs.jafc.9b02618
URIhttp://hdl.handle.net/10261/200403
DOIhttp://dx.doi.org/10.1021/acs.jafc.9b02618
ISSN0021-8561
Appears in Collections:(IRNAS) Artículos
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