01899naa a2200253 a 450000100080000000500110000800800410001902400530006010000190011324501080013226000090024052011590024965000120140865300170142065300190143765300160145665300220147265300270149470000210152170000160154270000200155870000200157877300470159821309762021-03-31       2021    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.3390/agriculture110402952DOI1 aMORALES, M. M.  aBiochar chemistry in a weathered tropical soilbkinetics of phosphorus sorption.h[electronic resource]  c2021  aThe phosphorus (P) chemistry of biochar (BC)-amended soils is poorly understood. This statement is based on the lack of published research attempting a comprehensive characterization of biochar?s influence on P sorption. Therefore, this study addressed the kinetic limitations of these processes. This was accomplished using a fast pyrolysis biochar made from a mix of waste materials applied to a highly weathered Latossolo Vermelho distrofico (Oxisol) from São Paulo, Brazil. Standard method (batch method) was used. The sorption kinetic studies indicated that P sorption in both cases, soil (S) and soil-biochar (SBC), had a relatively fast initial reaction between 0 to 5 min. This may have happened because adding biochar to the soil decreased P sorption capacity compared to the mineral soil alone. Presumably, this is a result of: (i) Inorganic phosphorus desorbed from biochar was resorbed onto the mineral soil; (ii) charcoal particles physically covered P sorption locations on soil; or (iii) the pH increased when BC was added SBC and the soil surface became more negatively charged, thus increasing anion repulsion and decreasing P sorption.  aBiochar  aBatch method  aFast pyrolysis  aP retention  aPirólise rápida  aRetenção de fósforo1 aCOMERFORD, n. b.1 aBEHLING, M.1 aABREU, D. C. de1 aGUERRINI, I. A.  tAgriculturegv. 11, n. 4, 295, 2021. 13 p.