biochars produced from woodchips and cottonstraw pyrolyzed at 850 C resulted in a remarkable decrease inthe dissipation of chlorpyrifos, carbofuran, and fipronil from soildue to their high sorption, which consequently reduced their bioavailability.Those authors also reported a pronounced decreasein the uptake of these pesticides by the plants grown in contaminatedsoils. Comparatively less efficiency was reported by the biocharproduced at <450 C. Low pesticide adsorption in soils may beattributed to the potential association of biochar with dissolved organicmatter from soil, which could coat biochar particles, reducingthe accessibility of pesticides to the sorption sites
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