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Microplastic sequestration in saltmarsh sediments from Eastern Brazil

Zenodo (CERN European Organization for Nuclear Research) 2024
Daniela Gadens Zanetti, Daniela Gadens Zanetti, Luiz Eduardo De Oliveira Gomes, Bethânia Dal Col Lehrback, Bethânia Dal Col Lehrback, Julia Alves Sonderhus, Agnes Ferreira Dos Santos Manhães, Gomes Ma, Ana Carolina de Lima Barizao, Anderson Antônio Batista, Pedro Belga, Marco Antonio Saraiva da Silva, André Luiz Lopes de Faria, Humberto Marotta, Eduardo Nery Duarte De Araújo, Fabian Sá

Summary

Researchers characterized microplastic accumulation in saltmarsh sediments from Todos os Santos Bay, Brazil, finding high sequestration rates in vegetated coastal zones. The results highlight saltmarshes as important hotspots for microplastic deposition in tropical coastal environments.

Polymers
PVC
Study Type Environmental

Todos os Santos Bay (BTS), situated in the Recôncavo Baiano micro-region, stands as one of Brazil's largest bays. BTS encompasses human occupation and a significant industrial park. These various anthropogenic influences impact the region's salt marshes and mangrove ecosystems, with one notable concern being the presence of plastics and microplastics (MPs). This study aims to determine the concentrations and historical trends of plastic pollution in sedimentary samples in the Caboto saltmarsh (38°30'13Ẅ 12°43'52S̈ and 38°30'6Ẅ 12°43'50S̈). Two cores ( 24 cm) were collected using a PVC pipe. The cores were sectioned in the field at 1 cm intervals from the top to a depth of 10 cm and at 2 cm intervals to the bottom. Plastic fractions were isolated using a Sediment-Microplastic Isolation (SMI) unit, employing density separation (NaCl, 1.2 g cm-3) and digestion of the organic matter (35 Also see: https://micro2024.sciencesconf.org/546230/document

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