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Tạp chí khoa học ĐHCT
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Bài báo - Tạp chí
13 (4) (2018) Trang: 7325-7344
Tạp chí: Bioresources

Wood- (bamboo and melaleuca) and herbaceous-based (rice husk and water hyacinth) biochars, produced from local biomass by slow pyrolysis at 500 °C, 700 °C, and 900 °C, were examined for their physical and chemical properties. The wood-based biomass produced biochars with  lower ash contents (dbash) and higher fixed carbon contents (> 54 wt.%db), greater higher heating value (>23 MJ/kg), higher degree of aromaticity (with O/C, H/C, and volatile matter/fixed carbon ratios were less than 0.08, 0.51, and 0.61, respectively), and smaller amount of salt nutrients (db) compared with those of the herbaceous-based biochars. Their unique properties have generated more interest in using them as a solid fuel, for carbon sequestration, and for soil amendment. The rice husk biochars contained more than 300 g/kgdb silica, which is potential for silicophilic plants. The water hyacinth biochars with the greatest volatile matter/fixed carbon (ranging from 0.72 to 2.35), and highest O/C ratios (0.11 to 0.18), indicating the lowest aromaticity among studied biochars and thus maybe least suitability for carbon sequestration. They also possessed a highest soluble salts content (>240 g/kgdb), highest electrical conductivity (>6489 mS/cm), and greatest liming potential (>6.56 %CaCO3–eq), which may not be suitable for salt-sensitive plants or low-buffer capacity soils.

Các bài báo khác
11/2022 (2022) Trang: in press
Tạp chí: International journal of recycling organic waste in agriculture
(2011) Trang:
Tạp chí: JOINT MEETING OF SOCIETY OF WETLAND SCIENTISTS, WETPOL AND WETLAND BIOGEOCHEMISTRY SYMPOSIUM, Prague-Czech Republic, 3-8 July 2011
 


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