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Main drivers for microplastic records in river sediments since the 1950s: Case study of the Loire river (France)

The Science of The Total Environment 2025 2 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 48 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Camille Croiset, Johnny Gaspéri Camille Croiset, Elie Dhivert, Johnny Gaspéri Elie Dhivert, Camille Croiset, Camille Croiset, Camille Croiset, Camille Croiset, Camille Croiset, Johnny Gaspéri Camille Croiset, Johnny Gaspéri Camille Croiset, Elie Dhivert, Johnny Gaspéri Elie Dhivert, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Elie Dhivert, Elie Dhivert, Johnny Gaspéri Ngoc-Nam Phuong, Ngoc-Nam Phuong, Johnny Gaspéri Johnny Gaspéri Ngoc-Nam Phuong, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Ngoc-Nam Phuong, Johnny Gaspéri Ngoc-Nam Phuong, Johnny Gaspéri Johnny Gaspéri Elie Dhivert, Elie Dhivert, Elie Dhivert, Elie Dhivert, Elie Dhivert, Aurore Zalouk‐Vergnoux, Elie Dhivert, Elie Dhivert, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Aurore Zalouk‐Vergnoux, Johnny Gaspéri Johnny Gaspéri Aurore Zalouk‐Vergnoux, Aurore Zalouk‐Vergnoux, Johnny Gaspéri Elie Dhivert, Johnny Gaspéri Aurore Zalouk‐Vergnoux, Johnny Gaspéri Aurore Zalouk‐Vergnoux, Elie Dhivert, Elie Dhivert, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Ngoc-Nam Phuong, Ngoc-Nam Phuong, Ngoc-Nam Phuong, Elie Dhivert, Elie Dhivert, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Ngoc-Nam Phuong, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Ngoc-Nam Phuong, Johnny Gaspéri Ngoc-Nam Phuong, Ngoc-Nam Phuong, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Cécile Grosbois, Johnny Gaspéri Cécile Grosbois, Johnny Gaspéri Cécile Grosbois, Johnny Gaspéri Johnny Gaspéri Cécile Grosbois, Cécile Grosbois, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Aurore Zalouk‐Vergnoux, Johnny Gaspéri Aurore Zalouk‐Vergnoux, Aurore Zalouk‐Vergnoux, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Aurore Zalouk‐Vergnoux, Aurore Zalouk‐Vergnoux, Aurore Zalouk‐Vergnoux, Johnny Gaspéri Johnny Gaspéri Agnès Baltzer, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Agnès Baltzer, Agnès Baltzer, Agnès Baltzer, Agnès Baltzer, Agnès Baltzer, Agnès Baltzer, Agnès Baltzer, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Ngoc-Nam Phuong, Cécile Grosbois, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Elie Dhivert, Johnny Gaspéri Johnny Gaspéri Elie Dhivert, Johnny Gaspéri Johnny Gaspéri Elie Dhivert, Elie Dhivert, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Elie Dhivert, Johnny Gaspéri Johnny Gaspéri Elie Dhivert, Aurore Zalouk‐Vergnoux, Aurore Zalouk‐Vergnoux, Aurore Zalouk‐Vergnoux, Aurore Zalouk‐Vergnoux, Johnny Gaspéri Johnny Gaspéri Aurore Zalouk‐Vergnoux, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Aurore Zalouk‐Vergnoux, Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri Johnny Gaspéri

Summary

This study examined sediment cores from the Loire River in France to reconstruct the history of microplastic accumulation since the 1950s, finding that polymer type, particle size, and local deposition conditions (floodplain vs. active channel) strongly influenced long-term archiving and that microplastic concentrations tracked known production milestones.

Study Type Environmental

Microplastics (MPs) are often detected in river sediment, but the processes that lead to their long-term archiving need more investigation. In this study, the evolution of MPs buried in sediments was explored in a river segment with a diversity of deposition conditions. Two cores were collected on a high island -flooded only during overbank episodes- and in a semi-active channel also flooded during moderate-water periods. After a characterisation of sediment (dating, composition, sedimentation rate), 25-5000 μm MP concentrations, size and polymer types were obtained through μFTIR (micro Fourier-transform infrared) spectroscopy. The increase in MP concentrations in the semi-active channel core (2000s-2022) was found to be related to the gradual grain sorting and enrichment in organic content. The no-trend in MP concentrations in the island core (1950s-2022), despite its verified recording capacity for other particle-bound contaminants, was attributed to flood event-driven MP inputs. To sum up, we concluded that (i) MP archiving in riverine sediments was favoured by a high abundance of fine-grained (<63 μm) and TOC-rich sediment, but that (ii) it was conditioned to depositional area determining flooding frequency, and (iii) large quantities of MPs transiting in the river. This study provides a novel insight on heterogeneous MP accumulation processes in riverine depositional environments, which is key for future monitoring studies. These findings participate to a better understanding of MP contamination of river sediments and are a supplementary step in the assessment of sediment cores to give valuable retrospective views on pollution evolution in time.

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