Abstract
Microplastics, as emerging pollutants, can adsorb polycyclicaromatic hydrocarbons (PAHs) in aqueous environments. However, the coeffects of PAHs and microplastics on aquatic organisms are vague. In this study, nanoscale and micron-scale microplastics (30 mg/kg) and phenanthrene (10 mg/kg) were added to aquatic sediment to explore the effects of different particle sizes of microplastics and typical PAHs on invertebrates (Tubifex tubifex) and microbes after 28 days operation. The fluorescence signal of fluorescently labelled micron-scale and nanoscale microplastics were detected in T. tubifex, especially nanoscale microplastics. The reduced activities of CAT, GST, SOD and MDA in T. tubifex suggested that the micron-sized microplastics and PAHs exacerbated the oxidative damage to T. tubifex. Microbial analysis confirmed that microplastics and PAHs decreased the abundance of Proteobacteria, Fusobacteriota and Bacteroidetes in the gut of T. tubifex and thereby affected the degradation of phenanthrene. Microplastics also reduced the abundance of Bacteroidetes, Acidobacteria and Proteobacteria in sediment. The abundance of salicylate hydroxylase enzyme that related to PAHs metabolism was increased with the addition of phenanthrene. The results in this study would be useful for further risk assessment of PAHs and microplastics in aquatic environments.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
