A study of the microplastic contamination of commercial table salts: A case study in Nigeria

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نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_EHEM-10-2_013

تاریخ نمایه سازی: 30 خرداد 1402

Abstract:

Background: Environmental pollution caused by microplastics (MPs) is quite ubiquitous and has become a global issue. Several studies have focused on MPs in marine and freshwater systems. However, there is a paucity of data about the presence of MPs in sea products like table salt and the risks they likely pose. Hence, this study investigated the presence of MPs in commonly consumed commercial table salts in South-West, Nigeria. Methods: A total of ۸ different brands of commonly consumed commercial salts were purchased from open supermarkets in Ogun and Lagos States, Nigeria. Salt samples were digested with ۳۰% H۲O۲, extracted for MPs, and observed under a digital microscope for shape, quantity, and colour. Results: Fibres and fragments were the plastic shapes found in the samples, with fibres being more prominent. The average content of MPs obtained was ۱۲ particles/kg. Blue, pink, and purple colours of MPs were commonly found. The sizes of MPs were between ۵۰ μm and ۱ mm. Considering our findings and based on the World Health Organization’s (WHO’s) recommended daily intake of ۵ g of salt, Nigerian adults will consume an average rate of ۲۱.۹ microplastic particles/year. Conclusion: According to the results of the study, table salts commonly consumed in Nigeria are polluted with MPs. Due to the importance of table salt as related to daily food intakes, it becomes very necessary to fine-tune technologies in their production to improve the quality and lower MPs ingested by consumers in Nigeria.

Authors

Oluwatosin Sarah Shokunbi

Corresponding author: Department of Basic Sciences, School of Science and Technology, Babcock University, Ogun State, Nigeria

David Olaoluwa Jegede

Department of Basic Sciences, School of Science and Technology, Babcock University, Ogun State, Nigeria

Olutayo Sunday Shokunbi

Department of Biochemistry, School of Basic Medical Sciences, Babcock University, Ogun State, Nigeria

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