Accumulation and ecological risk assessment of diazinon in surface sediments of Baiyangdian lake and its potential impact on probiotics and pathogens.

Autor: Wang Y; College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China., Xiao R; College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China. Electronic address: laorong-20@163.com., Hu Y; College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China., Li J; College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China., Guo C; College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China., Zhang L; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China., Zhang K; Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, China., Jorquera MA; Department of Chemical Sciences and Natural Resources, University of La Frontera, Temuco, 01145, Chile., Pan W; College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China.
Jazyk: angličtina
Zdroj: Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2024 Sep 15; Vol. 357, pp. 124408. Date of Electronic Publication: 2024 Jun 19.
DOI: 10.1016/j.envpol.2024.124408
Abstrakt: Diazinon is an organophosphorus pesticide widely used in agriculture and household pest control, and its use also poses several environmental and health hazards. In this study, we investigated the spatial and temporal distribution of diazinon in Baiyangdian, evaluated its potential ecological risk and toxicity to aquatic organisms based on RQ (Risk quotient) and TU (Toxic unit) analysis, and assessed the potential effects of diazinon accumulation on probiotics and pathogens based on statistical analysis of high-throughput sequencing data. The results showed that diazinon in Baiyangdian posed a low to moderate chronic risk to sediment-dwelling organisms and a low toxicity effect on aquatic invertebrates, which was mainly concentrated in October and human-intensive areas. Meanwhile, increases in sediment electrical conductivity (EC), amorphous iron oxides content and phenol oxidase activity favored diazinon accumulation in sediments, whereas the opposite was the case for sediment organic carbon, β-1,4-glucosidase, phosphatase, catalase and pH, suggesting that environmental indicators play a key role in the behavior and distribution of diazinon. In addition, diazinon in heavily contaminated areas seem to inhibit the rare probiotics (Bifidobacterium adolescentis and Serratia sp.), while promoted dominant pathogens (e.g., Burkholderia cenocepacia), which can lead to increased disease risk to humans and ecosystems, disruption of ecological balance and potential health problems. However, probiotic Streptomyces xiamenensis resist to diazinon would be a potential degrader for diazinon remove. In conclusion, this study unveiled the effects of diazinon pollution on wetland ecosystems, emphasizing ecological impacts and potential health concerns. In addition, the discovery of diazinon resistant probiotics provided new insights into wetland ecological restoration.
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 Ltd. All rights reserved.)
Databáze: MEDLINE
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