Details
| Original language | English |
|---|---|
| Pages (from-to) | 1713-1725 |
| Number of pages | 13 |
| Journal | Agronomy Journal |
| Volume | 112 |
| Issue number | 3 |
| Early online date | 12 Mar 2020 |
| Publication status | Published - 26 May 2020 |
Abstract
Recently, low input agriculture has been encouraged because of its sustainability and environmentally friendly vision. Conversion of biomass into control-released materials is one of the approaches to upcycle biomass and nutrients. This study aims at examining the dynamics of K release from Si-rich biochars formed from various pyrolysis strategies with the findings expected to be applicable to develop new refinery strategies for biomass nutrients. A Si-rich fern species [Dicranopteris linearis (Burm.f.) Underw.] was selected to prepare biochars under various pyrolysis conditions (e.g., temperature, N2 supported). It was found that K was re-located during pyrolysis and occurred as free K+ ions, associated with organic matter and occluded in silica structure. Pyrolysis can be strategically applied to alter either the organic phase or the silica phase in the biochars in term of porosity and chemical reactivities, whereby controlling K release kinetics. The maximum level of released K was at 600 °C (5.4 g kg−1) which was about one order of magnitude higher than the minimum level of released K at 200 °C (0.55 g kg−1). This discrepancy in the release rates of K suggests that adjusting pyrolysis temperature can be a strategical practice to control K release and to develop biochar-based K fertilizers.
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
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In: Agronomy Journal, Vol. 112, No. 3, 26.05.2020, p. 1713-1725.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Release kinetics of potassium from silica-rich fern-derived biochars
AU - Nguyen, Anh T.Q.
AU - Bui, Tu A.
AU - Mai, Nga T.
AU - Tran, Hien T.
AU - Tran, Son V.
AU - Nguyen, Nam H.
AU - Tsubota, Toshiki
AU - Shinogi, Yoshiyuki
AU - Dultz, Stefan
AU - Nguyen, Minh N.
N1 - Funding information: This research was funded by the Vietnam National Foundation for Science & Technology Development (NAFOSTED) under grant no. 105.08?2018.300. X?ray tomographic microscopy was performed with support from Federica Marone at the TOMCAT beamline of the synchrotron facility of the Paul Scherrer Institute, Villigen, Switzerland. Great help from Sarah B. Cichy at the GFZ German Research Centre for Geosciences, Potsdam for the morphological characterization of the fern from the tomographic dataset is acknowledged. D. linearis This research was funded by the Vietnam National Foundation for Science & Technology Development (NAFOSTED) under grant no. 105.08-2018.300. X-ray tomographic microscopy was performed with support from Federica Marone at the TOMCAT beamline of the synchrotron facility of the Paul Scherrer Institute, Villigen, Switzerland. Great help from Sarah B. Cichy at the GFZ German Research Centre for Geosciences, Potsdam for the morphological characterization of the fern D. linearis from the tomographic dataset is acknowledged.
PY - 2020/5/26
Y1 - 2020/5/26
N2 - Recently, low input agriculture has been encouraged because of its sustainability and environmentally friendly vision. Conversion of biomass into control-released materials is one of the approaches to upcycle biomass and nutrients. This study aims at examining the dynamics of K release from Si-rich biochars formed from various pyrolysis strategies with the findings expected to be applicable to develop new refinery strategies for biomass nutrients. A Si-rich fern species [Dicranopteris linearis (Burm.f.) Underw.] was selected to prepare biochars under various pyrolysis conditions (e.g., temperature, N2 supported). It was found that K was re-located during pyrolysis and occurred as free K+ ions, associated with organic matter and occluded in silica structure. Pyrolysis can be strategically applied to alter either the organic phase or the silica phase in the biochars in term of porosity and chemical reactivities, whereby controlling K release kinetics. The maximum level of released K was at 600 °C (5.4 g kg−1) which was about one order of magnitude higher than the minimum level of released K at 200 °C (0.55 g kg−1). This discrepancy in the release rates of K suggests that adjusting pyrolysis temperature can be a strategical practice to control K release and to develop biochar-based K fertilizers.
AB - Recently, low input agriculture has been encouraged because of its sustainability and environmentally friendly vision. Conversion of biomass into control-released materials is one of the approaches to upcycle biomass and nutrients. This study aims at examining the dynamics of K release from Si-rich biochars formed from various pyrolysis strategies with the findings expected to be applicable to develop new refinery strategies for biomass nutrients. A Si-rich fern species [Dicranopteris linearis (Burm.f.) Underw.] was selected to prepare biochars under various pyrolysis conditions (e.g., temperature, N2 supported). It was found that K was re-located during pyrolysis and occurred as free K+ ions, associated with organic matter and occluded in silica structure. Pyrolysis can be strategically applied to alter either the organic phase or the silica phase in the biochars in term of porosity and chemical reactivities, whereby controlling K release kinetics. The maximum level of released K was at 600 °C (5.4 g kg−1) which was about one order of magnitude higher than the minimum level of released K at 200 °C (0.55 g kg−1). This discrepancy in the release rates of K suggests that adjusting pyrolysis temperature can be a strategical practice to control K release and to develop biochar-based K fertilizers.
UR - http://www.scopus.com/inward/record.url?scp=85083465881&partnerID=8YFLogxK
U2 - 10.1002/agj2.20209
DO - 10.1002/agj2.20209
M3 - Article
AN - SCOPUS:85083465881
VL - 112
SP - 1713
EP - 1725
JO - Agronomy Journal
JF - Agronomy Journal
SN - 0002-1962
IS - 3
ER -