Influence of particle size on ecotoxicity of low-density polyethylene microplastics, with and without adsorbed benzo-a-pyrene, in Clam Scrobicularia plana

This study investigated the ecotoxicological effects of differently sized (4–6 µm and 20–25 µm) low-density polyethylene (LDPE) microplastics (MPs), with and without adsorbed benzo-a-pyrene (BaP), in clam <i>Scrobicularia plana</i>. Biomarkers of oxidative stress (superoxide dismutase—SO...

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Bibliographic Details
Main Author: Rodrigues, Ana Rita (author)
Other Authors: Mestre, Nélia (author), FONSECA, TAINÁ (author), Pedro, Paulo (author), Carteny, Camilla C. (author), Cormier, Bettie (author), Keiter, Steffen (author), Bebianno, Maria João (author)
Format: article
Language:eng
Published: 2022
Subjects:
Microplastics
Benzo-a pyrene
Biomarkers
IBR
Health index
Scrobicularia plana
Online Access:http://hdl.handle.net/10400.1/17529
Country:Portugal
Oai:oai:sapientia.ualg.pt:10400.1/17529
Description
Summary:This study investigated the ecotoxicological effects of differently sized (4–6 µm and 20–25 µm) low-density polyethylene (LDPE) microplastics (MPs), with and without adsorbed benzo-a-pyrene (BaP), in clam <i>Scrobicularia plana</i>. Biomarkers of oxidative stress (superoxide dismutase—SOD; catalase—CAT), biotransformation (glutathione-S-transferases—GST), oxidative damage (lipid peroxidation—LPO) and neurotoxicity (acetylcholinesterase—AChE) were analysed in gills and digestive glands at different time intervals for a total of 14 days of exposure. In order to have a better impact perspective of these contaminants, an integrated biomarker response index (IBR) and Health Index were applied. Biomarker alterations are apparently more related to smaller sized (4–6 µm) MPs in gills and to virgin LDPE MPs in the digestive gland according to IBR results, while the digestive gland was more affected by these MPs according to the health index.

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