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Published on: July 4, 2021
Abundance, composition, and potential intake of microplastics in canned fish
Razegheh Akhbarizadeh1, Sina Dobaradaran2, Iraj Nabipour3
1Systems Environmental Health and Energy Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran; The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran.
Abstract:
The existence of microplastics (MPs) in canned fish (tuna and mackerel) samples was investigated and their composition, possible sources and potential intake were assessed. Light and fluorescence microscopy were used for the quantification of potential MPs. Furthermore, micro-Raman microscopy, and scanning electron microscopy coupled with an energy dispersive X-ray were used to identify the polymer types and composition of MPs. The results showed that 80% of samples had at least one plastic particle and fibers were the most abundant shapes of MPs. Moreover, polyethylene terephthalate (32.8%) was the most common polymer type in canned fish samples. The fish, food additives, and contact materials during the cleaning and canning process are possible sources of MPs. Human intake estimation of MPs showed the possibility of plastics absorption by humans who consume canned fish several times/week. Hence, the results of this study showed the importance of MPs' guidelines for food safety and hygiene.
Insights
Microplastics were found in 80% of canned fish. Polyethylene terephthalate was the most common type, raising concerns about human intake and food safety.
Area of Science:
- Environmental Science
- Food Science
- Toxicology
Background:
- Microplastics (MPs) are a growing environmental concern.
- Their presence in seafood, a common food source, requires investigation.
Purpose of the Study:
- To investigate the presence, composition, and sources of microplastics in canned fish (tuna and mackerel).
- To assess the potential human intake of microplastics from canned fish consumption.
Main Methods:
- Quantification of MPs using light and fluorescence microscopy.
- Identification of polymer types and composition using micro-Raman microscopy and scanning electron microscopy with energy dispersive X-ray.
- Estimation of human intake based on consumption patterns.
Main Results:
- Microplastics were detected in 80% of canned fish samples.
- Fibers were the most prevalent MP shape.
- Polyethylene terephthalate (32.8%) was the most common polymer identified.
- Potential sources include the fish itself, food additives, and canning processes.
Conclusions:
- Canned fish can be a source of microplastic exposure for humans.
- Regular consumption may lead to plastic absorption.
- The study highlights the need for microplastic guidelines in food safety and hygiene.
