Improved microbial-plant soil bioremediation of PAHs and heavy metal through in silico methods.

Autor: Zhao L; College of New Energy and Environment, Jilin University, Changchun 130012, China. Electronic address: leizhao20@mails.jlu.edu.cn., Sun P; College of New Energy and Environment, Jilin University, Changchun 130012, China. Electronic address: sunpx22@mails.jlu.edu.cn., Gao J; MOE Key Laboratory of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China. Electronic address: gjx12020114@163.com., Li Y; MOE Key Laboratory of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China. Electronic address: 120222232055@ncepu.edu.cn., Pu Q; MOE Key Laboratory of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China. Electronic address: puqikun2000@163.com., Lyu C; College of New Energy and Environment, Jilin University, Changchun 130012, China. Electronic address: lvcong@jlu.edu.cn., Zhao W; College of New Energy and Environment, Jilin University, Changchun 130012, China. Electronic address: zhaowj@jlu.edu.cn.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 Oct 05; Vol. 478, pp. 135524. Date of Electronic Publication: 2024 Aug 14.
DOI: 10.1016/j.jhazmat.2024.135524
Abstrakt: The combined pollution of polycyclic aromatic hydrocarbons (PAHs) and organic cadmium (Cd) in farmland soils, and the field controlling strategy need to be studied urgently. In this study, 5 PAHs, 5 Cd and 11 soil conditioners were selected to explore the co-exposure risk and remediation efficiency. Firstly, a significant combination Fl-alkylalkoxy cadmium was obtained using forward and reverse methods coupling variation coefficient methods (the combined pollution value was 0.173). Secondly, the interaction energy of microbial degradation / plant absorption of Fl under Cd stress, and microbial mineralization / plant absorption of alkylalkoxy cadmium under PAHs stress were characterized using factorial experimental design, molecular docking and molecular dynamics simulation. The combined pollution of alkylalkoxy cadmium and dialkyl cadmium, phenanthrene and Benzo [a] pyrene was significant (synergistic contribution rates were 17.58 % and 19.22 %, respectively). In addition, 6 soil conditioners with significant efficiency were selected to design Taguchi orthogonal experimental schemes, indicating the microbial degradation / mineralization and plant absorption were significantly effective (the maximum increase of remediation efficiency was 93.81 %) under the combinations (i.e., trratone, coumarol, fulvamic acid, potassium fertilizer and others, etc.). Finally, it was found that the soil conditioners affected the hydrophobic groups and forces, and the efficiency was proportional to the highest peak value and minimum distance in the RDF curve. This study identifies the risk characteristics of co-exposure of PAHs and Cd and screens effective soil conditioners, providing theoretical guidance for risk controlling.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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