A novel Zr-P-modified nanomagnetic herbal biochar immobilized Cd and Pb in water and soil and enhanced the relative abundance of metal-resistant bacteria: Biogeochemical and spectroscopic investigations to identify the governing factors and potential mechanisms

[Display omitted] •A novel Zr-P-modified nanomagnetic herbal derived biochar (ZMBC) is synthesized.•ZMBC showed higher Pb2+ and Cd2+ removal than pristine and nanomagnetic BC.•ZMBC reduced DTPA-Pb2+ by 51.3% and-Cd2+ by 56.1% and altered the mobile fractions.•ZMBC increased the relative abundance of...

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Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2024-04, Vol.485, p.149978, Article 149978
Main Authors: Fang, Yueru, Wang, Ping, Zhang, Lan, Zhang, Han, Xiao, Ran, Luo, Yuan, Tang, Kuok Ho Daniel, Li, Ronghua, Abdelrahman, Hamada, Zhang, Zengqiang, Rinklebe, Jörg, Lee, Sang Soo, Shaheen, Sabry M.
Format: Article
Language:English
Subjects:
Adsorption and stabilization
Engineered biochar
Microbial community
Soil and water remediation
Toxic metals
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Summary:[Display omitted] •A novel Zr-P-modified nanomagnetic herbal derived biochar (ZMBC) is synthesized.•ZMBC showed higher Pb2+ and Cd2+ removal than pristine and nanomagnetic BC.•ZMBC reduced DTPA-Pb2+ by 51.3% and-Cd2+ by 56.1% and altered the mobile fractions.•ZMBC increased the relative abundance of beneficial soil bacteria.•ZMBC is an applicable candidate for remediation of metal contaminated water/soil. Remediation of toxic metals contaminated water and soil using engineered biochar is of great concern. This study introduces a novel zirconium-phosphate-modified nanomagnetic biochar (ZMBC) synthesized from traditional Chinese herbal residues as a potential adsorbent for remediation of Cd2+ and Pb2+ contaminated water and soil. The impact of co-existing ions, ionic strength, metal concentrations, pH, and contact time on the adsorption/immobilization efficiency/mechanisms of ZMBC for Cd2+ and Pb2+ in water and soil were investigated together with the induced changes in soil bacterial community for the first time. The governing factors and potential mechanisms for the interaction between metals and ZMBC have been investigated using biogeochemical, microscopic, and spectroscopic techniques. The adsorption capacity of ZMBC for Pb2+ (357.1 mg g−1) and Cd2+ (136.2 mg g−1) was significantly higher than that of pristine biochar (BC) and nanomagnetic biochar (MBC) (
ISSN:1385-8947
DOI:10.1016/j.cej.2024.149978