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Spatio-temporal evaluation of macro, meso and microplastics in surface waters, bottom and beach sediments of two embayments in Niterói, RJ, Brazil

Marine Pollution Bulletin 2020 66 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Rebeca Oliveira Castro, Fábio Vieira de Araújo Fábio Vieira de Araújo Rebeca Oliveira Castro, Rebeca Oliveira Castro, Rebeca Oliveira Castro, Rebeca Oliveira Castro, Rebeca Oliveira Castro, Rebeca Oliveira Castro, Rebeca Oliveira Castro, Rebeca Oliveira Castro, Mônica Regina da Costa Marques, Fábio Vieira de Araújo Fábio Vieira de Araújo Rebeca Oliveira Castro, Rebeca Oliveira Castro, Rebeca Oliveira Castro, Melanie Lopes da Silva, Melanie Lopes da Silva, Melanie Lopes da Silva, Rebeca Oliveira Castro, Rebeca Oliveira Castro, Fábio Vieira de Araújo Mônica Regina da Costa Marques, Mônica Regina da Costa Marques, Melanie Lopes da Silva, Mônica Regina da Costa Marques, Fábio Vieira de Araújo Fábio Vieira de Araújo Fábio Vieira de Araújo Fábio Vieira de Araújo Fábio Vieira de Araújo Fábio Vieira de Araújo Fábio Vieira de Araújo Mônica Regina da Costa Marques, Fábio Vieira de Araújo

Summary

Researchers evaluated macro, meso, and microplastic distribution across surface waters and sediments in two Brazilian embayments, finding microplastics comprised 83% of collected waste with highest concentrations (138.41 items/kg) in beach sediments dominated by HDPE, polypropylene, and styrene. Beach sediments showed elevated microplastic concentrations during the rainy season and were identified as the most informative compartment for tracking plastic waste dynamics over time.

Polymers

HDPE PE PP

Study Type Environmental

This study evaluated in the dry and rainy periods, the anthropogenic influence and the hydrodynamics in the distribution of plastic items in surface waters and bottom and beach sediments of the Jurujuba (Guanabara Bay, low and medium hydrodynamic) and Itaipu (oceanic region, high hydrodynamics) embayments; places of cultivation and extraction of mussels. Microplastics were 83% of the wastes collected, with a higher average concentration (138.41 items.kg) in beach sediments. High density polyethylene (HDPE) (38%), polypropylene (21%), and styrene (10%) were the most frequent polymers. There was no difference between the water and bottom sediment samples in the different embayments, in the studied periods, different from that observed in the beach sediment samples, with higher concentrations in the rainy season in Jurujuba. The results suggest that beach sediments are the best compartment to understand the dynamics of the distribution of plastic waste over time.

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