Ecotoxicological effects of cellulose acetate nanoplastic derived from cigarette butts on earthworm (Allolobophora caliginosa): Implications for soil health

IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Zeinab Bakr , Gehad N. Aboulnasr , Mohamed Abd El-Aal , Naser A. Elshimy , Shimaa Mohamed Said
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Abstract

Plastic pollution from nanoplastics (NPs) poses a growing environmental threat, with cigarette butts (CBs) representing a significant yet often overlooked source of terrestrial contamination. This study investigates the ecotoxicological effects of cellulose acetate nanoplastics (CA-NPs) derived from both smoked (SCB-NPs) and unsmoked (USCB-NPs) on the earthworm Allolobophora caliginosa, using commercially available CA-NPs (CCA-NPs) for comparison. The NPs were characterized and tested for their impact on earthworm endpoints such as mortality, growth, oxidative stress biomarkers, and genotoxicity. SCB-NPs exhibited the most severe toxic effects, leading to increased mortality, growth inhibition, heightened oxidative stress parameters and significant DNA damage. USCB-NPs and CCA-NPs also induced notable adverse effects, though to a lesser extent than SCB-NPs. Markers of oxidative stress were elevated across all NPs exposures, accompanied by suppressed antioxidant enzyme activities and an increase in detoxification enzyme activity. Genotoxicity analysis using the Comet assay confirmed greater DNA damage in earthworms exposed to SCB-NPs. These findings suggest that combustion by products intensify the toxicity of CB-derived NPs, posing a serious risk to soil organisms and ecosystem health. The results emphasize the urgent need for improved cigarette waste management to mitigate the release and impact of toxic nanoparticles in terrestrial environments.
烟头提取的醋酸纤维素纳米塑料对蚯蚓的生态毒理学效应:对土壤健康的影响
纳米塑料(NPs)造成的塑料污染构成了日益严重的环境威胁,烟头(CBs)是一个重要但往往被忽视的陆地污染源。本研究利用市售的醋酸纤维素纳米塑料(CCA-NPs)进行比较,研究了烟熏(SCB-NPs)和未烟熏(USCB-NPs)制备的醋酸纤维素纳米塑料(CA-NPs)对caliginosa alloobophora蚯蚓的生态毒理学效应。研究人员对NPs进行了表征,并测试了它们对蚯蚓终点的影响,如死亡率、生长、氧化应激生物标志物和遗传毒性。SCB-NPs表现出最严重的毒性作用,导致死亡率增加、生长抑制、氧化应激参数升高和显著的DNA损伤。USCB-NPs和CCA-NPs也引起了显著的不良反应,但程度低于SCB-NPs。在所有NPs暴露中,氧化应激标志物升高,同时抗氧化酶活性受到抑制,解毒酶活性增加。使用Comet试验的遗传毒性分析证实,暴露于SCB-NPs的蚯蚓的DNA损伤更大。这些发现表明,燃烧副产物增强了cb衍生的NPs的毒性,对土壤生物和生态系统健康构成严重风险。研究结果强调,迫切需要改善卷烟废物管理,以减轻有毒纳米颗粒在陆地环境中的释放和影响。
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来源期刊
Environmental Research
Environmental Research 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
12.60
自引率
8.40%
发文量
2480
审稿时长
4.7 months
期刊介绍: The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.
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