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Microplastics (MPs) are emerging pollutants of global concern due to their pervasiveness, high sorption ability for persistent organic pollutants (POPs) and direct and indirect toxicity to marine organisms, ecosystems, as well as humans. As one of the major coastal interfaces, beaches are considered among the most affected ecosystems by MPs pollution. The morphological characteristics of MPs (pellets and fragments) collected from four beaches along the Tunisian coast and sorbed POPs, including polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs), were investigated in this study. The results showed that the MPs varied greatly in color, polymer composition and degradation degree. The color varied from colored to transparent and the most prevalent polymer identified using Raman spectroscopy was polyethylene. Scanning electron microscope (SEM) images exhibited various surface degradation features including cavities, cracks, attached diatom remains, The concentrations of ΣPCBs over all beaches ranged from 14 to 632 ng g and 26 to 112 ng g in the pellets and fragments, respectively, with a notable presence and dominance of highly-chlorinated PCBs such as CB-153 and -138. Among the OCPs, γ-HCH is the only compound detected with concentrations ranging from 0.4 to 9.7 ng g and 0.7 to 4.2 ng g in the pellets and fragments, respectively. Our findings indicate that MPs found on the Tunisian coast may pose a chemical risk to marine organisms as the concentrations of PCBs and γ-HCH in most of the analysed samples exceeded the sediment-quality guidelines (SQG), especially the effects range medium (ERM) and the probable effects level (PEL). As the first report of its kind, the information gathered in this study can serve as the baseline and starting point for future monitoring work for Tunisia and neighbouring countries, as well as for stakeholders and coastal managers in decision-making processes.
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http://dx.doi.org/10.1039/d3em00169e | DOI Listing |
Microplastics (MPs), less than 5 mm in length, have become a major environmental issue due to their hazardous physical and chemical properties. The research investigated 54 sediment samples collected from three different zones of the beaches, namely the wrack line, beach face, and swash zone. This study aims to enumerate the number and polymeric variety of microplastics found in beach sediments from coastal islands of Bangladesh, including Sandwip, Kutubdia, and Saint Martin's Island in the northeastern Bay of Bengal.
View Article and Find Full Text PDFBull Environ Contam Toxicol
December 2024
Department of Geology, Faculty of Sciences, Alagappa University, Karaikudi, Tamilnadu, 630003, India.
This study investigates microplastic prevalence in wastewater mixing point from major coastal cities in Tamil Nadu, India, highlighting a significant environmental challenge. In January 2023, 16 wastewater samples revealed microplastics (< 5 mm) ranging from 20 to 51 items per litre. Predominant colours were pink, black, brown, white, green, blue, red, and yellow, with orange being the least common.
View Article and Find Full Text PDFJBJS Essent Surg Tech
December 2024
Department of Orthopedics, OhioHealth Health System, Columbus, Ohio.
Mar Pollut Bull
January 2025
Laboratory of Aquatic Systems: Marine and Continental Environments (AQUAMAR), Department of Biology, Faculty of Sciences, Ibn Zohr University, Agadir 80000, Morocco.
The pervasive presence of microplastics (MPs) in the environment is well established, yet many critical questions remain about their distribution and potential impacts on both ecological and human health. To assess the risks that MPs pose, especially through marine ecosystems and human consumption, monitoring their ingestion by fish in natural environments is essential. This study investigated the contamination of 12 fish species, the most commonly consumed in Morocco, collected from the Atlantic Ocean off the Moroccan coast.
View Article and Find Full Text PDFAppl Biochem Biotechnol
November 2024
School of Food Science & Engineering, South China University of Technology, Guangzhou, 510640, China.
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