کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7606257 1492944 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen retention of biochar derived from different feedstocks at variable pyrolysis temperatures
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Nitrogen retention of biochar derived from different feedstocks at variable pyrolysis temperatures
چکیده انگلیسی
Pyrolysis temperature is known to affect the potential of biochar as a nutrient-holding soil amendment, but the mechanism is unclear. In this study, physiochemical properties of biochar derived from switchgrass, water oak and biosolid at different pyrolysis temperatures were characterized using multiple techniques. In addition, biochar sorption of nitrogen nutrients in forms of ammonium (NH4+), nitrite (NO2−) and nitrate (NO3−) was investigated. The results indicated that the profound effects of pyrolysis temperature on biochar physiochemical properties were feedstock-specific. Similarly, biochar derived from different feedstocks at different temperatures exhibited different strengths to retain NH4+, NO2− and NO3−. The maximum NH4+ retention capacities were found with the biochar of switchgrass produced at 800 °C (10.47 mg g−1), biochar of water oak at 400 °C (3.82 mg g−1), and raw biosolids (43.29 mg g−1). Meanwhile, biochar was found to have limited (switchgrass and water oak) and negative (biosolids) retention for NO2− and NO3−. The cation exchange capacity (CEC) and morphological characteristics (e.g., porosity) were found to be the predominant factors affecting biochar NH4+ sorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Analytical and Applied Pyrolysis - Volume 133, August 2018, Pages 136-146
نویسندگان
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