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A novel urease-producing strain effectively induces cadmium biomineralization under low-temperature stress.

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Τίτλος: A novel urease-producing strain effectively induces cadmium biomineralization under low-temperature stress.
Συγγραφείς: Yu Y; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China., Zheng Q; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China., Peng F; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China., Huang Y; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China., Qiu C; Agricultural and Livestock Products Engineering Technology Research Center of Xizang Autonomous Region, Institute of Agricultural Quality Standard and Testing, Xizang Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850032, China., Liu Q; Agricultural and Livestock Products Engineering Technology Research Center of Xizang Autonomous Region, Institute of Agricultural Quality Standard and Testing, Xizang Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850032, China., Liang L; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China., Wu B; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China. Electronic address: wub@cdut.edu.cn.
Πηγή: Journal of environmental sciences (China) [J Environ Sci (China)] 2026 Oct; Vol. 168, pp. 187-195. Date of Electronic Publication: 2026 Jan 14.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: IOS Press Country of Publication: Netherlands NLM ID: 100967627 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1001-0742 (Print) Linking ISSN: 10010742 NLM ISO Abbreviation: J Environ Sci (China) Subsets: MEDLINE
Imprint Name(s): Publication: Amsterdam : IOS Press
Original Publication: Beijing : Editorial Dept. of Journal of Environmental Sciences (China), 1989-
Ιατρικοί όροι (MeSH): Cadmium*/metabolism , Soil Pollutants*/metabolism , Pseudomonas*/metabolism , Urease*/metabolism, Biomineralization ; Cold Temperature ; Biodegradation, Environmental
Περίληψη: Microbially induced carbonate precipitation (MICP) has been widely used to immobilize Cadmium (Cd) in contaminated soils in mining-affected regions. However, its remediation efficacy under low-temperature stress, as well as the nucleation process that regulates Cd biomineralization via carbonate precipitation by psychrophilic bacteria, has yet to be investigated. Here, we isolated Pseudomonas sp. J-6, a novel urease-producing strain from tailings in high-altitude cold regions, exhibiting unparalleled cold adaptability at 5 °C and achieving 95.85 % Cd removal efficiency by MICP at 10 °C. Furthermore, the coprecipitation process of Ca1-xCdxCO3 was clarified through the continuous observation of the precipitates after the low-temperature MICP reaction. The crystal morphology transitioned from loose vaterite in the early stage to a dense square-block morphology in the middle stage. Cd2+ progressively shifted from a surface-bound state to lattice incorporation, ultimately resulting in the formation of stable Cd-substituted calcite crystals. In this process, low temperatures led to the formation of larger, highly ordered Cd-substituted calcite crystals, thereby strengthening Cd sequestration and its long-term stability. In addition, under low-temperature stress, Pseudomonas sp. J-6 induced MICP reaction decreased the bioavailable Cd in alpine slag soil by 44.85 % and enhanced physical properties. In the freeze-thaw cycles, the remediation efficiency remained stable. This study clarified the biomineralization potential in high-altitude cryogenic environments and the nucleation process of Cd biomineralization by psychrophilic bacteria-induced carbonate precipitation, filling a critical research gap in its application under extreme conditions and highlighting its promise for sustainable remediation of heavy metal pollution under low-temperature stress.
(Copyright © 2026. Published by Elsevier B.V.)
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.
Contributed Indexing: Keywords: Cadmium; Coprecipitation process; Low-temperature stress; Microbially induced carbonate precipitation (MICP); Soil remediation
Substance Nomenclature: 00BH33GNGH (Cadmium)
0 (Soil Pollutants)
EC 3.5.1.5 (Urease)
Entry Date(s): Date Created: 20260901 Date Completed: 20260901 Latest Revision: 20260901
Update Code: 20260902
DOI: 10.1016/j.jes.2026.01.026
PMID: 42680376
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1001-0742
DOI:10.1016/j.jes.2026.01.026