Cited by 12Heavy metals in environmentAdsorption and biosorption for pollutant removalEnvironmental remediation with nanomaterials

Effects of α-Fe2O3 modified chicken manure biochar on the availability of multiple heavy metals and soil biochemical properties

Li, Yingchao, Yin, Hua, Guo, Zhanyu, Zhu, Minghan, Yan, Caiya, Li, Xiaoqin, Dang, Zhi·2023·Journal of Environmental Chemical Engineering

Abstract

The problem of increasingly severe soil heavy metals contamination is of great concern worldwide. Herein, chicken manure and potassium ferrocyanide were used as raw materials to prepare a α-Fe 2 O 3 loaded biochar (Fe 2 O 3 /BC) composite material through a simple calcination method. We found Fe 2 O 3 /BC obtained at 350 ℃ (Fe 2 O 3 /BC-350) exhibited excellent immobilization efficiency on multiple heavy metals in soil. And then density functional theory (DFT) calculations explained the reason of Fe 2 O 3 /BC-350 exhibited better remediation performance than the Fe 2 O 3 /BC-250 and Fe 2 O 3 /BC-550. When cultured for 90 days, the passivation effect of the 1% Fe 2 O 3 /BC-350 dosage treatment achieved the highest with the immobilization rates for Cu(II), Cd(II) and Pb(II) reaching 62.5%, 45.56% and 42.56%, respectively. The composite material increased soil pH and cation exchange capacity (CEC), and promoted the transformation of Cu(II), Cd(II) and Pb(II) ions from acid-soluble to more stable forms through ion exchange, precipitation and complexation. The soybean pot experiment further verified that Fe 2 O 3 /BC-350 could reduce the phytoavailable fractions of heavy metal soil remediation material. In addition, Fe 2 O 3 /BC-350 increased the activity of soil urease and sucrase. Meanwhile, the diversity and richness of the soil microbial community were improved. These results demonstrated that Fe 2 O 3 /BC-350 not only had an excellent immobilization effect on heavy metals in the soil, but also Fe 2 O 3 /BC-350 exhibited environmentally friendly in soil. As a result, Fe 2 O 3 /BC can serve as a promising remediation agent for multiple heavy metal polluted soils .

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Crossref · 10.1016/j.jece.2023.109922

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Authors
Li, Y., Yin, H., Guo, Z., Zhu, M., Yan, C., Li, X., & Dang, Z.
Affiliations
  • South China University of Technology (CN)
  • Guangdong Key Laboratory of Solid Waste Pollution Control and Recycling (CN)
Corresponding author
Yin, Hua
Venue
Journal of Environmental Chemical Engineering
Publisher
Elsevier BV
Published
2023-06
Volume
11
Issue
3
Pages
109922
ISSN
  • 2213-2929 (ISSN-L)
  • 2213-3437
OpenAlex
W4365459527
Cited by
12
References
67
Citations by year
2026: 5 · 2025: 3 · 2024: 4
FWCI
0.80
Type
journal article
Language
en
Open access
closed
Locations
Journal of environmental chemical engineering (publishedVersion)
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
chicken manure biochar, heavy metal immobilization, soil remediation, potassium ferrocyanide, calcination temperature, copper, cadmium, lead, heavy metal speciation, soil pH, cation exchange capacity, soil microbial communities, soil enzyme activity, soybean, biochar composites

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