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Indian sea salts are contaminated with microplastics
Summary
A news article reported that Indian sea salts from all eight major brands tested were contaminated with microplastics, adding to a growing list of common food items found to contain plastic particles. This finding raises concerns about dietary exposure to microplastics for people who consume salt regularly.
Indian sea salts sold by reputable domestic brands are widely contaminated with microplastics, a new study confirms. Examining eight brands of salts obtained from markets in the Mumbai region, Chandan Krishna Seth and Amritanshu Shriwastav of the Indian Institute of Technology, Bombay, found they all contained microplastic particles (Environ. Sci. Pollut. Res. 2018, DOI: 10.1007/s11356-018-3028-5). Particle counts varied per brand, ranging from 56 ± 49 to 103 ± 39 particles/kg of salt, for an average mass of 63.76 µg/kg salt. Particle materials included polyesters, poly(ethylene terephthalate), polyamide, polyethylene, and polystyrene. “Extensive dietary consumption of these Indian sea salts in multiple countries exposes a significant international population to the associated health effects of microplastic ingestion,” the researchers note. Seth and Shriwastav also experimented with removing microplastics from seawater using a simple bed of sand, fine gravel, and coarse gravel. One pass through the filtration bed removed 85% of microplastic particles from