共 124 条
Toxicity comparison of polylactic acid and polyethylene microplastics co-exposed with methylmercury on Daphnia magna
被引:1
作者:
Ali, Wajid
[1
,2
,3
]
Jeong, Haksoo
[3
]
Zinck, Philippe
[1
]
Souissi, Sami
[2
,4
,5
]
Lee, Jae-Seong
[3
]
机构:
[1] Univ Artois, Univ Lille, CNRS,UCCS Unite Catalyse & Chim Solide, UMR 8181,Cent Lille,ENSCL, F-59000 Lille, France
[2] Univ Littoral Cote dOpale, Univ Lille, Stn Marine Wimereux, CNRS,IRD,UMR 8187,LOG,Lab d'Oceanologie & Geosci, F-59000 Lille, France
[3] Sungkyunkwan Univ, Coll Sci, Dept Biol Sci, Suwon 16419, South Korea
[4] Natl Taiwan Ocean Univ, Ctr Excellence Ocean Engn, Keelung 20224, Taiwan
[5] Natl Taiwan Ocean Univ, Operat Ctr Enterprise Acad Networking, Keelung 20224, Taiwan
基金:
新加坡国家研究基金会;
关键词:
Polylactic acid;
Low-density polyethylene;
Methylmercury;
Oxidative stress;
Bioaccumulation;
GOBY POMATOSCHISTUS-MICROPS;
OXIDATIVE STRESS;
TROPHIC TRANSFER;
INGESTION;
ACCUMULATION;
ZOOPLANKTON;
JUVENILES;
MERCURY;
D O I:
10.1016/j.marpolbul.2024.117318
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
The prevalence of microplastics (MPs) in aquatic ecosystems has become a significant environmental concern due to their persistence and potential toxicity. Although bioplastics, such as polylactic acid (PLA), are promoted as eco-friendly alternatives to conventional plastics, their toxicity remains poorly understood. This study compares the toxicity and pollutant vector roles of polar PLA-derived bio-microplastics (bio-MPs) with apolar lowdensity polyethylene (LDPE) MPs, both individually and in combination with methylmercury (MeHg), in Daphnia magna. PLA bio-MPs, both alone and in combination with MeHg, significantly reduced survival rates and reproduction while inducing oxidative stress. Additionally, PLA bio-MPs increased Hg accumulation and negatively impacted acetylcholinesterase activity and vitellogenin gene expression compared to LDPE MPs. The findings of this study suggest that PLA bio-MPs, despite being in vivo biodegradable, may pose similar or even greater environmental risks than fossil fuel-based MPs, particularly due to their potential to enhance the bioaccumulation and toxicity of coexisting pollutants.
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页数:12
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