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ORIGINAL RESEARCH article
Front. Microbiol.
Sec. Terrestrial Microbiology
Volume 16 - 2025 |
doi: 10.3389/fmicb.2025.1529784
This article is part of the Research Topic Mineral Solubilizing Microorganisms (MSM) and Their Applications in Nutrient Bioavailability, Bioweathering and Bioremediation, Vol III View all 9 articles
Metagenomic analysis revealed the bioremediation mechanism of lead and cadmium contamination by modified biochar synergized with Bacillus cereus PSB-2 in phosphate mining wasteland
Provisionally accepted- Wuhan Institute of Technology, Wuhan, China
The heavy metals lead (Pb) and cadmium (Cd) in the phosphate mining wasteland are of great environmental risk, and ecological restoration of phosphate mining wasteland is particularly significant. There are fewer studies on soil heavy metals in phosphate mining wasteland with modified biochar and functional microorganisms. In this study, soil bioremediation of phosphate mining wasteland was carried out with modified biochar in synergy with the phosphate solubilizing bacteria strain, Bacillus cereus. The results indicated that the available phosphate content in the soil increased by 59.32%. The content of extractable state Pb 2+ and Cd 2+ decreased by 65.06% and 71.26%, respectively. And the soil nutrient conditions were significantly improved. Synergistic remediation can significantly increase the diversity and abundance of soil microbial communities (p<0.05). Janibacter, Lysobacter, Ornithinimicrobium, Bacillus and Salinimicrobium were the main functional flora during soil remediation, with significant correlations for the promotion of Pb 2+ and Cd 2+ immobilization and the increase of available phosphate and organic matter. ZitB, czcD, zntA and cmtR are the major heavy metal resistance genes and regulate metabolic pathways to make microbial community function more stable after soil remediation in phosphate mining wasteland.
Keywords: Phosphate mining wasteland, heavy metals, Modified biochar, Phosphate solubilizing bacteria, bioremediation
Received: 17 Nov 2024; Accepted: 31 Jan 2025.
Copyright: © 2025 Zhang, Peng, Wang, Zhou, Yu, Chi and Xiao. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Chunqiao Xiao, Wuhan Institute of Technology, Wuhan, China
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