Skip to main content
Log in

Immobilization of Cd and Pb in soil facilitated by magnetic biochar: metal speciation and microbial community evolution

  • Research Article
  • Published:
Environmental Science and Pollution Research Aims and scope Submit manuscript

Abstract

The preparation of magnetic biochar from sewage sludge and rice straw for heavy metal contaminated soil remediation has greater application prospects, but its remediation mechanism was rarely considered by combining soil physicochemical properties with microbial community. In this study, the effects of magnetic sewage sludge biochar (SSB) and rice straw biochar (RSB) on Cd and Pb immobilization in paddy soil were compared and analyzed by 60-day soil incubation experiments. The results illustrated that DTPA-Cd and DTPA-Pb were reduced by 51.53% (43.07%) and 53.57% (50.47%), while the percentage of residual fraction of the BCR procedure was enhanced by 31.27% (30.78%) of Cd and 27.25% (23.22%) of Pb in the SSB (RSB) treatment, respectively. Fe was detected on both SSB and RSB surfaces, but SSB had rougher and a larger specific surface area compared to RSB. The addition of SSB and RSB in paddy soil increased soil pH and TOC content, and affected the diversity and species of soil microbial community. Compared with the CK group, the relative abundance of Proteobacteria, Bacteroidota, and Lysobacter decreased, and the relative abundance of Actinobacteriota, Pontibacter, and Alkaliphilus increased with SSB and RSB treatments, all of which reflected the bioavailability of Cd and Pb reduction.

Graphical abstract

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others

Data availability

The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.

References

Download references

Funding

This work was supported by the Fundamental Research Fund for State Key Laboratory of Pollution Control and Resource Reuse Foundation (no. PCRRF19001) and Natural Science Foundation of Shanghai (no. 22ZR1401700).

Author information

Authors and Affiliations

Authors

Contributions

Yinzhu Diao: conceptualization, formal analysis, data curation, writing—original draft. Lei Zhou: writing—reviewing and editing. Mengyuan Ji: software. Xiaoxia Wang: validation, supervision. Yitong Dan: Investigation. Wenjing Sang: funding acquisition, resources, writing—review and editing.

Corresponding author

Correspondence to Wenjing Sang.

Ethics declarations

Ethics approval and consent to participate

Not applicable.

Consent for publication

Not applicable.

Competing interests

The authors declare no competing interests.

Additional information

Responsible Editor: Zhihong Xu

Publisher's note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Diao, Y., Zhou, L., Ji, M. et al. Immobilization of Cd and Pb in soil facilitated by magnetic biochar: metal speciation and microbial community evolution. Environ Sci Pollut Res 29, 71871–71881 (2022). https://doi.org/10.1007/s11356-022-20750-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11356-022-20750-9

Keywords

Navigation