Cited by 295Soil Carbon and Nitrogen DynamicsAdsorption and biosorption for pollutant removalThermochemical Biomass Conversion Processes

Ageing of black carbon along a temperature gradient

Cheng, Chih-Hsin, Lehmann, Johannes·2009·Chemosphere

Abstract

Black carbon (BC) is regarded as a chemically and biologically stable form of carbon and the changes of BC properties in nature are generally assumed to be minute. However, more and more observations have argued the inertness of BC. The objectives of this study were to characterize the changes of BC properties through ageing processes and to identify if these changes are associated with temperature. Our results showed that ageing of BC occurs over a temperature range from -22 degrees C to 70 degrees C within a short period of 12 months. The main changes of BC properties through ageing were found in elemental composition, surface chemistry, and adsorption properties, where the aged BCs were shown to have higher oxygen concentrations, surface acidity, and negative surface charge but lower C concentrations, pH, surface basicity, point of zero net charge, and also a lower adsorption capacity of hydroquinone, an allelopathic compound, than fresh BC. These ageing processes of BC were affected by temperature and changed over time, with higher temperature and longer incubation time enhancing BC ageing. Our results from a wide temperature range suggest that ageing of BC is likely to occur in any terrestrial regime and that the changes of BC properties through ageing should not be overlooked.

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Crossref · 10.1016/j.chemosphere.2009.01.045

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  • In both blending with compost and co-composting, the porous biochar adsorptive surface sites are charged with nutrients, thereby stimulating microbial colonization, improving biochar surface reactivity through accelerated oxidative aging and promoting dissolved organic carbon (DOC) adsorption and coating.

    “In both cases, the porous biochar adsorptive surface sites are charged with nutrients [18,19], thereby stimulating microbial colonization [20], improving biochar surface reactivity through accelerated oxidative aging [21,22] and promoting dissolved organic carbon (DOC) adsorption and coating [18,[23][24][25].”

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Authors
Cheng, C.-H., & Lehmann, J.
Affiliations
  • National Taiwan University (TW)
  • Cornell University (US)
Corresponding author
Cheng, Chih-Hsin
Venue
Chemosphere
Publisher
Elsevier BV
Published
2009-05
Volume
75
Issue
8
Pages
1021-1027
ISSN
0045-6535 (ISSN-L)
OpenAlex
W1977847066
Cited by
295
References
35
Citations by year
2026: 7 · 2025: 11 · 2024: 7 · 2023: 16 · 2022: 14 · 2021: 22 · 2020: 22 · 2019: 19 · 2018: 21 · 2017: 33 · 2016: 24 · 2015: 22 · 2014: 20 · 2013: 18 · 2012: 15
FWCI
21.73
Type
journal article
Language
en
Open access
closed
Locations
  • Chemosphere (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
Keywords
black carbon, temperature gradient, surface chemistry, surface acidity, surface charge, oxygen concentration, adsorption capacity, hydroquinone, allelochemicals, elemental composition, point of zero net charge, incubation time
MeSH terms
Adsorption, Surface Properties, Temperature, Time Factors, Spectroscopy, Fourier Transform Infrared, Soot

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