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揭示聚钢和低密度聚乙烯微塑料对虫毒性的影响

Junjie Zhai¹, Zihan Zhou¹, Yunxiu Yan¹

¹College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China; Beijing Key Laboratory of Biodiversity and Organic Farming, Beijing, 100193, China; State Key Laboratory of Nutrient Use and Management, Beijing, 100193, China; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing, 100193, China.

Journal of environmental management

|December 28, 2024

概括

聚钢 (PS) 和低密度聚乙烯 (LDPE) 微塑料没有改变 (As) 在虫中的毒性. 然而,联合暴露增加了氧化应激和改变了抗氧化酶活性,表明受污染的土壤中存在复杂的相互作用.

科学领域:

环境毒理学环境毒理学
生态毒理学生态毒理学
土壤科学土壤科学

背景情况:

聚钢 (PS) 和低密度聚乙烯 (LDPE) 的高产量和低回收率导致微塑料 (MP) 在土壤中积累.
对于MPs和 (As) 等重金属对土壤无脊椎动物 (如虫) 的综合生态毒理影响尚不清楚.

研究的目的:

研究PS/LDPE微塑料和 (As) 对土Eisenia fetida的生存,生长,繁殖和生理反应的联合影响.
评估MPs对As诱导的氧化应激,DNA损伤和与土繁殖和排毒相关的基因表达的影响.

主要方法:

地 (Eisenia fetida) 暴露于单独的As,单独的MPs (PS和LDPE),以及组合的As + MPs.
评估的生存,生长和繁殖率.
评估了凝血细胞的DNA损伤,反应性氧物种 (ROS) 积累和抗氧化酶活动 (氧化酶,超氧化酶,酶).
测量了与生殖相关的基因ANN和排毒酶CYP450.0的mRNA水平.
使用综合生物标志物响应 (IBR) 分析.

主要成果:

无论PS还是LDPE都没有改变As对虫生存,生长或繁殖的影响.
作为暴露,单独和MPs,诱导了胆红细胞中的DNA损伤.
与单独暴露As相比,As+MPs的联合暴露增加了ROS积累,并显著降低了抗氧化酶活性.
单独As降低了子产量和ANN mRNA水平;As + MPs降低了CYP450 mRNA水平.
IBR分析显示,PS/LDPE对As的整体生态毒理作用没有显著的影响.

结论:

聚钢和LDPE微塑料不会加剧对虫生存,生长和繁殖的直接毒性.
对MPs和As的联合暴露会诱导氧化应激,并改变地中的抗氧化和解毒途径.
微塑料不会显著改变对虫的综合生态毒理影响,但显示出复杂的生理相互作用.

关键词:

亚是一种.土虫土虫是一种虫.低密度聚乙烯的低密度聚乙烯.微塑料是一种微塑料.聚乙烯是一种聚乙烯.

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