Effect of gasification biochar application on soil quality: trace metal behavior, microbial community, and soil dissolved organic matter
Abstract
Compared to pyrolysis biochar (PBC), gasification biochar (GBC) differs in both composition and surface functionalities due to the use of an oxidizing purging gas. This work compares the effect of using PBC and GBC as soil amendments on the soil properties, trace metal bioavailability, soil microbial activity, and soil dissolved organic matter (DOM). Biochar-driven reduction of bioavailable metals does not necessarily result in a positive impact on the soil microbial growth. The DOM in the soil was strongly related to the soil microbial activity, as revealed by the strong correlation between the soil dehydrogenase activity (DHA) and soil dissolved organic carbon (r = 0.957, p < 0.01). Three identified fluorescent components (C1, C2, C3) in the soil DOM were closely associated with the soil microbial activity, for instance, with a clear positive correlation between the soil DHA and C1 (r = 0.718, p < 0.05) and a significant negative correlation between the total bacterial fatty acid methyl ester content and C3 (r = -0.768, p < 0.05). The bioavailability of Cd and Zn is not only related to the pH and surface functionalities of the biochar, but also to its aromatic carbon and inorganic mineral composition. This study further demonstrates that a fluorescence excitation-emission matrix coupled with parallel factor analysis is a useful tool to monitor changes in the soil quality after application of biochar, which is greatly relevant to the soil biota.
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Biochar addition to agricultural soils has improved soil water availability, water holding capacity, nutrient availability, increased soil microbial biomass and activity, reduced risk of crust formation and soil erosion, enhanced antibacterial activity, and reduced mobility and toxicity of environmental pollutants.
“Biochar addition to agricultural soils has improved soil water availability, water holding capacity, and nutrient availability,235, 236, 237 increased soil microbial biomass and activity,238 reduced risk of crust formation and soil erosion,239 enhanced antibacterial activity,240 and reduced mobility and toxicity of environmental pollutants in the soil.241,242”
From Technologies and perspectives for achieving carbon neutrality (2021) · cites this paper as [238]
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- Authors
- Yang, X., Tsibart, A., Nam, H., Hur, J., El-Naggar, A., Tack, F. M. G., Wang, C.-H., Lee, Y. H., Tsang, D. C. W., & Ok, Y. S.
- Affiliations
- Kangwon National University (KR)
- Ghent University (BE)
- Korea Institute of Energy Research (KR)
- Sejong University (KR)
- National University of Singapore (SG)
- Gyeongsangnam-do Agricultural Research and Extension Services (KR)
- Hong Kong Polytechnic University (HK)
- Korea University (KR)
- Corresponding author
- Tsang, Daniel C.W.
- Ok, Yong Sik
- ORCID
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2019-03
- Volume
- 365
- Pages
- 684-694
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2901463846
- Cited by
- 205
- References
- 62
- Citations by year
- 2026: 11 · 2025: 15 · 2024: 22 · 2023: 36 · 2022: 31 · 2021: 32 · 2020: 42 · 2019: 14 · 2018: 1
- FWCI
- 20.79
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
- Ghent University Academic Bibliography (Ghent University) (submittedVersion)
- Funders
- Korea University
- National Research Foundation of Korea (NRF-2015R1A2A2A11001432)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Keywords
- soil amendment, trace metal bioavailability, soil microbial activity, soil dissolved organic matter, dehydrogenase activity, fluorescent dissolved organic matter, cadmium, zinc, soil quality, fluorescence excitation-emission matrix, parallel factor analysis
- MeSH terms
- Charcoal, Gases, Humic Substances, Metals, Soil, Soil Microbiology, Solubility, Trace Elements, Environmental Restoration and Remediation, Microbiota
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