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通过纳米合体/g-C₃N₄通过异构结构介导的单片氧气生成对Chlorella Pyrenoidosa的增强光毒性

Shuli Yao¹, Qixing Zhou¹, Wen An¹

¹Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Carbon Neutrality Interdisciplinary Science Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.

Environmental science & technology

|September 17, 2025

概括

石墨碳化物 (CN) 与纳米聚合物 (Ncs) 相互作用,形成异构结构,增加活性氧物种并破坏植物浮游生物光合作用. 这种相互作用显著影响水生生态系统中的藻类生长和基因表达.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
材料科学材料科学材料科学

背景情况:

石墨相碳化物 (CN) 是一种广泛使用的材料,具有潜在的环境释放.
对CN与无处不在的纳米聚合物 (NCS) 的环境相互作用和生态影响的了解很少.
植物浮游生物是水生生态系统中至关重要的初级生产者,对环境污染物敏感.

研究的目的:

研究水生环境中CN和Ncs之间的相互作用机制.
评估CN和Ncs对植物浮游生物 (Chlorella pyrenoidosa) 的联合毒性.
阐明所观察到的生态毒性背后的分子机制.

主要方法:

使用电荷交换,电子转移和异构结构形成分析 (C-O键) 进行CN-Ncs相互作用的表征.
在不同度的CN和Ncs下对植物浮游生物生长抑制和光合作用系统损伤的评估.
分析反应性氧物种 (ROS) 生成,叶绿素a (chl-a) 和鲁比斯科酶活性.
代谢学和转录学分析以确定分子水平的破坏.

主要成果:

CN和Ncs通过电荷交换和异构结构的形成相互作用,增强ROS的产生 (O2).
对Ncs+CN的联合暴露导致了藻类光合作用系统的显著损伤,抑制了16.35%的生长.
观察到光诱导的光毒性,减少了chl-a和rubisco活性 (分别为3.50-22.23%和1.73-21.76%),以及与光合作用相关的基因 (psbR,psbB,rbcS) 的下调.

结论:

纳米聚合物显著调节石墨碳化物的环境行为和毒性.
Ncs和CN的联合存在对植物浮游生物的健康和水生生态系统的功能构成重大威胁.
生态风险评估需要在环境相关的次效应度上进行长期研究,以充分了解物质影响.

关键词:

转移能量转移能量是什么?石墨阶段的二氧化碳化物.自然的纳米聚合物是天然的纳米聚合物.摄影毒性摄影毒性

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