کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5432265 1508832 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Changes in biochar physical and chemical properties: Accelerated biochar aging in an acidic soil
ترجمه فارسی عنوان
تغییرات خواص فیزیکی و شیمیایی زیست تخریب: زایش سریع زیستی قارچ در خاک اسیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی

Biochar (BC) is increasingly used as soil amendment; however, its stability and alteration in the soil environment are still unclear. Here, we investigated BC decomposition and changes of BC characteristics during a long-term incubation experiment. 13C-depleted BCs were incubated for two years in an acidic Planosol and a calcareous Chernozem, respectively. BC decomposition inferred from the C isotope signature of the incubated materials was marginal. Yet, small angle X-ray scattering showed that the surface roughness of the BCs increased over time. Mid-infrared spectra indicated changes in the BCs' molecular characteristics upon aging. There was an overall increase of infrared bands assigned to H- and O-containing functional groups, especially carboxylic groups. Contact angle measurements revealed that the hydrophobic surfaces of freshly produced BCs became more hydrophilic during soil incubation. Our results suggest that BC aging is strongly influenced by soil traits. In the more acidic Planosol, these aging processes were accelerated.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 115, May 2017, Pages 209-219
نویسندگان
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