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- W2772089074 abstract "The C:N ratios of biochar labile fractions is important for assessing biochar stability and N cycling in soil. Here we compare chemically and thermally labile fractions for nine biochars produced from five biomass feedstocks using four production techniques. Biochar fractionation methods included proximate analysis, hot water extraction, acid and base extractions (0.05 M, 0.5 M, 1 M, 2 M, 3 M, and 6 M of either H2SO4 or NaOH), and oxidation with 15% H2O2 and 0.33 M KMnO4 (pH 7.2). Results show chemical addition reactions cause underestimation of mass of the labile fraction for chemical extraction and oxidation procedures but not the thermal procedure. Estimates of C and N in labile and recalcitrant fractions were not adversely affected by addition reactions, because solvents were independent of C or N. Results indicate that herbaceous biochars may be a source of N fertility while hardwood biochars may immobilize N during the first few years after biochar application to soils." @default.
- W2772089074 created "2017-12-22" @default.
- W2772089074 creator A5029315796 @default.
- W2772089074 creator A5043034061 @default.
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- W2772089074 date "2018-03-01" @default.
- W2772089074 modified "2023-10-17" @default.
- W2772089074 title "Quantification and characterization of chemically-and thermally-labile and recalcitrant biochar fractions" @default.
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- W2772089074 doi "https://doi.org/10.1016/j.chemosphere.2017.11.151" @default.
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