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|Title:||Biochar chemistry in a weathered tropical soil: kinetics of phosphorus sorption.|
|Authors:||MORALES, M. M.|
COMERFORD, n. b.
ABREU, D. C. de
GUERRINI, I. A.
|Affiliation:||MARINA MOURA MORALES, CNPF; NICHOLAS BRIAN COMERFORD, University of Hawaii; MAUREL BEHLING, CPAMT; DANIEL CARNEIRO DE ABREU, UFMT; IRAÊ AMARAL GUERRINI, UNESP.|
|Citation:||Agriculture, v. 11, n. 4, 295, 2021. 13 p.|
|Description:||The 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.|
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|Type of Material:||Artigo de periódico|
|Appears in Collections:||Artigo em periódico indexado (CNPF)|
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