Pyrolysis temperature influences ameliorating effects of biochars on acidic soil
Abstract
The biochars were prepared from straws of canola, corn, soybean, and peanut at different temperatures of 300, 500, and 700 °C by means of oxygen-limited pyrolysis.Amelioration effects of these biochars on an acidic Ultisol were investigated with incubation experiments, and application rate of biochars was 10 g/kg. The incorporation of these biochars induced the increase in soil pH, soil exchangeable base cations, base saturation, and cation exchange capacity and the decrease in soil exchangeable acidity and exchangeable Al. The ameliorating effects of biochars on acidic soil increased with increase in their pyrolysis temperature. The contribution of oxygen-containing functional groups on the biochars to their ameliorating effects on the acidic soil decreased with the rise in pyrolysis temperature, while the contribution from carbonates in the biochars changed oppositely. The incorporation of the biochars led to the decrease in soil reactive Al extracted by 0.5mol/L CuCl2, and the content of reactive Al was decreased with the increase in pyrolysis temperature of incorporated biochars. The biochars generated at 300 °C increased soil organically complexed Al due to ample quantity of oxygen-containing functional groups such as carboxylic and phenolic groups on the biochars, while the biochars generated at 500 and 700 °C accelerated the transformation of soil exchangeable Al to hydroxyl-Al polymers due to hydrolysis of Al at higher pH. Therefore, the crop straw-derived biochars can be used as amendments for acidic soils and the biochars generated at relatively high temperature have great ameliorating effects on the soils.
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Previous studies on tire waste pyrolysis primarily investigated process variables to increase liquid oil quantity, not quality.
“The primary objective of these studies was to investigate the effect of various process variables such as temperature, reaction time, feedstock size and type, and scale of the reactor on pyrolysis products and how to increase the quantity of produced liquid oil, but not the quality of liquid oil (Kraiem et al., 2016; Wu et al., 2016; Wan et al., 2014).”
From Effect of advanced catalysts on tire waste pyrolysis oil (2018) · cites this paper as Wan et al., 2014
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- Authors
- Wan, Q., Yuan, J.-H., Xu, R.-K., & Li, X.-H.
- Affiliations
- Nanjing Agricultural University (CN)
- Chinese Academy of Sciences (CN)
- Corresponding author
- Xu, Ren-Kou
- ORCID
- Xu, Ren-Kou
- Venue
- Environmental Science and Pollution Research
- Published
- 2013-09-29
- Volume
- 21
- Issue
- 4
- Pages
- 2486-2495
- ISSN
- 0944-1344 (ISSN-L)
- 1614-7499
- OpenAlex
- W2133716648
- Cited by
- 50
- References
- 42
- Citations by year
- 2025: 4 · 2024: 4 · 2023: 4 · 2022: 4 · 2021: 8 · 2020: 4 · 2019: 4 · 2018: 4 · 2017: 5 · 2016: 5 · 2015: 4
- FWCI
- 4.34
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Environmental Science and Pollution Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Management and Crop Yield
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Agricultural Science and Fertilization
- Keywords
- biochar, pyrolysis temperature, Ultisol, crop straw, canola straw, corn stover, soybean straw, peanut straw, exchangeable aluminum, soil pH, cation exchange capacity, oxygen-containing functional groups, carbonates, soil amendment
- MeSH terms
- Aluminum, Brassica, Carbonates, Charcoal, Copper, Zea mays, Hot Temperature, Hydrogen-Ion Concentration, Lactones, Arachis, Phenols, Soil, Glycine max
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