کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8852389 | 1618777 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantification and characterization of chemically-and thermally-labile and recalcitrant biochar fractions
ترجمه فارسی عنوان
تعیین و تعیین خصوصیات فیزیکی شیمیایی و ترمیمی و بازدارنده
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
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 (0.05Â M, 0.5Â M, 1Â M, 2Â M, 3Â M, and 6Â M of either H2SO4 or NaOH), and oxidation with 15% H2O2 and 0.33Â 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 194, March 2018, Pages 247-255
Journal: Chemosphere - Volume 194, March 2018, Pages 247-255
نویسندگان
Santanu Bakshi, Chumki Banik, David A. Laird,