Impacts of Biochar (Black Carbon) Additions on the Sorption and Efficacy of Herbicides

Biochar Soil Additions Affect Herbicide Fate: Importance of Application Timing and Feedstock Species

“…Higher sorption of CMZ on H700-and P700-amended soil was expected since H700 and P700 were the BC´s that presented higher SSA values, 230 and 281 m 2 /g, respectively (Table 1). SSA has been typically correlated to the sorption capability of BCs 7,31 . This result is also in agreement with studies reporting higher sorption of organic compounds on soils amended with BCs prepared at high temperature of pyrolysis.…”

Glyphosate sorption/desorption on biochars – interactions of physical and chemical processes

“…Previous biochar sorption studies with weak acid compounds have similarly concluded that factors other than pH influence sorption variability with temperature. 35 No clear trend was observed between biochar SSA and production temperature; therefore, SSA likewise fails to account for the increase in glyphosate sorption with temperature.…”

Changes in sorption and bioavailability of herbicides in soil amended with fresh and aged biochar

“…Biochar has attracted attention primarily due to its sorption capacity (Cabrera-Mesa and Spokas, 2010;Yavari et al, 2015). The affinity of BC for organic compounds is hypothesized to be determined by its surface area, structural porosity, and surface chemistry.…”

“…Freshly-applied biochar to soil has been widely documented to affect the fate of pesticides and it has been proposed as a tool to mitigate contamination problems derived from pesticide use. Typically, BC increases the sorption of pesticides in soils (Cabrera-Mesa and Spokas, 2010;Yavari et al, 2015), but their availability is intimately governed by desorption processes. Sorption has been shown to decrease biodegradation and leaching of pesticides (Cabrera-Mesa and Spokas, 2010;Lehmann et al, 2011;Sopeña et al, 2012), but may also reduce pesticide efficacy (Gámiz et al, 2017a;Yavari et al, 2015).…”