Effect of crop-straw derived biochars on Pb (II) adsorption in two variable charge soils
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Two variable charge soils were incubated with biochars derived from straws of peanut, soybean, canola, and rice to investigate the effect of the biochars on their chemical properties and Pb(II) adsorption using batch experiments. The results showed soil cation exchange capacity (CEC) and pH significantly increased after 30 d of incubation with the biochars added. The incorporation of the biochars markedly increased the adsorption of Pb(II), and both the electrostatic and non-electrostatic adsorption mechanisms contributed to Pb(II) adsorption by the variable charge soils. Adsorption isotherms illustrated legume-straw derived biochars more greatly increased Pb(II) adsorption on soils through the non-electrostatic mechanism via the formation of surface complexes between Pb(II) and acid functional groups of the biochars than did non-legume straw biochars. The adsorption capacity of Pb(II) increased, while the desorption amount slightly decreased with the increasing suspension pH for the studied soils, especially in a high suspension pH, indicating that precipitation also plays an important role in immobilizing Pb(II) to the soils.
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Biochars produced from nonleguminous straws had a higher CEC than those produced from leguminous straws.
“Likewise, biochars produced from nonleguminous straws had a higher CEC than those produced from leguminous straws (Jiang et al., 2014).”
From A review on biochar modulated soil condition improvements and nutrient dynamics concerning crop yields: Pathways to climate change mitigation and global food security (2019) · cites this paper as Jiang et al., 2014
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- Authors
- JIANG, T.-Y., XU, R.-K., GU, T.-X., & JIANG, J.
- Affiliations
- Nanjing Agricultural University (CN)
- Chinese Academy of Sciences (CN)
- Nanjing Foreign Language School (CN)
- Corresponding author
- JIANG, Jun
- Venue
- Journal of Integrative Agriculture
- Publisher
- Elsevier BV
- Published
- 2014-03
- Volume
- 13
- Issue
- 3
- Pages
- 507-516
- ISSN
- 2095-3119 (ISSN-L)
- OpenAlex
- W1988912838
- Cited by
- 33
- References
- 30
- Citations by year
- 2024: 4 · 2023: 4 · 2022: 2 · 2021: 6 · 2020: 2 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 5 · 2014: 1
- FWCI
- 2.12
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Integrative Agriculture (publishedVersion, cc-by-nc-nd)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Natural Science Foundation of Shanghai
- National Natural Science Foundation of China (41230855)
- Topics
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Keywords
- biochar, crop straw, lead adsorption, variable charge soils, cation exchange capacity, soil pH, electrostatic adsorption, surface complexation, adsorption isotherms, lead desorption, lead precipitation, peanut straw, soybean straw, canola straw, rice straw, heavy metal immobilization
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