编号：CDUT-2024-9

标题：Joint toxicity mechanisms of perfluorooctanoic acid and sulfadiazine on submerged macrophytes and periphytic biofilms

入藏号：WOS:001027482200001

中国科学院文献情报中心期刊分区：环境科学与生态学1区TOP（2023）

本校作者：张威振; 李琪*; 杨镒霞; 余杨金枝; 李爽;刘静; 肖云星; 文越龄; 雷泞菲

来源出版物：JOURNAL OF HAZARDOUS MATERIALS  卷: 458  文献号: 131910 

出版年：2023

第一地址：成都理工大学

关键词：Perfluorooctanoic acid; Sulfadiazine; Metabolome; Combined toxicity

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摘要：Hazardous chemicals, such as perfluoroalkyl substances (PFASs) and antibiotics, coexist in aquatic environments and pose a severe threat to aquatic organisms. However, research into the toxicity of these pollutants on sub-merged macrophytes and their periphyton is still limited. To assess their combined toxicity, Vallisneria natans (V. natans) was exposed to perfluorooctanoic acid (PFOA) and sulfadiazine (SD) at environmental concentrations. Photosynthetic parameters such as chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids were lower in the SD exposure group, indicating that SD had a significant effect on the photosynthesis of aquatic plants. Single and combined exposures effectively induced antioxidant responses, with increases in superoxide dismutase, peroxidase activities, and ribulose-1,5-bisphosphate carboxylase concentrations, as well as malondialdehyde content. Accordingly, antagonistic toxicity was assessed between PFOA and SD. Furthermore, metabolomics revealed that V. natans improved stress tolerance through changes in enoic acid, palmitic acid, and palmito-leoyloxymyristic acid related to the fatty acid metabolism pathway responding to the coexisting pollutants. Additionally, PFOA and SD in combination induced more effects on the microbial community of biofilm. The alternation of a- and beta-D-glucopyranose polysaccharides and the increased content of autoinducer peptides and N-acylated homoserine lactones indicated that PFOA and SD changed the structure and function of biofilm. These investigations provide a broader perspective and comprehensive analysis of the responses of aquatic plants and periphyton biofilms to PFAS and antibiotics in the environment.

文章链接地址: https://www.sciencedirect.com/science/article/pii/S0304389423011937