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碳基纳米材料在海洋微藻Heterosigma akashiwo中的毒性和生物转化

Konstantin Pikula¹, Seyed Ali Johari², Ralph Santos-Oliveira^3,4

¹Polytechnical Institute, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia.

International journal of molecular sciences

|June 28, 2023

概括

这项研究评估了碳基纳米材料 (CNM) 对海洋微藻的毒性. 富勒 (C60) 和石墨烯 (Gr) 的毒性和结构变化较低,而碳纳米管 (CNT) 和石墨烯氧化物 (GrO) 的毒性更高.

科学领域:

环境毒理学环境毒理学
海洋生物学海洋生物学
纳米材料科学是一门学科.

背景情况:

碳基纳米材料 (CNMs) 的使用越来越多,引发了人们对其环境影响的担忧.
海洋微藻是重要的初级生产者,对环境污染物敏感.
了解CNM与海洋生物的相互作用对于生态风险评估至关重要.

研究的目的:

评估海洋微藻中常见的CNM (CNT,C60,Gr,GrO) 的环境毒理和生物转化.
确定不同CNM的毒性水平和作用机制.
评估暴露后CNM的长期影响和结构变化.

主要方法:

海洋微藻被暴露在CNTs,C60,Gr和GrO中长达7天.
通过流动细胞计测,使用增长率抑制,酶活性,膜潜力和活性氧物种 (ROS) 评估了毒性.
使用FTIR和拉曼光谱分析了生物转化.

主要成果:

毒性顺序 (EC50,96h):CNTs (18.98毫克/升) >GrO (76.77毫克/升) >Gr (159.40毫克/升) >C60 (414.0毫克/升).
CNTs和GrO诱导了氧化应激和膜脱极化.
随着时间的推移,Gr和C60的毒性降低了,在125 mg/L的7天后没有副作用,并且表现出结构变形.

结论:

对于海洋微藻,CNM表现出不同的毒性概况和机制.
富勒 (C60) 和石墨烯 (Gr) 似乎对生态有毒性较小,并且经历了结构变化,这表明生物降解或生物可用性降低的可能性.
碳纳米管 (CNT) 和石墨烯氧化物 (GrO) 由于显著的毒性和氧化应激等特定机制,造成更高的风险.

关键词:

生物测试生物测试碳纳米管是如何使用的环境命运环境命运环境命运流动细胞计量是流动细胞计量的方法.富勒伦 (Fullerene) 是一个完全的.石墨烯是一种石墨烯.增长速度的抑制抑制增长率的抑制.纳米颗粒是一种纳米粒子.纳米毒理学的纳米毒理学氧化应激是一种氧化应激.

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