کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9694053 1459638 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of alkaline extraction on the characteristics of humic substances in Brazilian soils
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Influence of alkaline extraction on the characteristics of humic substances in Brazilian soils
چکیده انگلیسی
An investigation was made of the influence of alkaline extraction on the characteristics of humic substances extracted from Brazilian soil samples. Humic substances (HS) from seven different soils samples collected in Brazil were extracted using the procedure recommended by the International Humic Substances Society (IHSS). Soils, HS and humins were characterized by thermogravimetry and differential thermal analysis. About 8 mg of each material (soil, HS and humin) were placed in a platinum crucible and heated continuously from 20 to 750 °C at a heating rate of 10 °C min−1 in an atmosphere of synthetic air (100 ml min−1). A thermal analysis revealed a difference between the content and structural characteristics of organic matter present in HS and humin fractions in relation to their soils. The results indicated that alkaline extraction alters the characteristics of humic substances during the extraction process, underlining the importance of developing methodologies and analytical procedures that allow organic matter in soils to be studied without extracting it.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 433, Issues 1–2, 1 August 2005, Pages 77-82
نویسندگان
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