2 ms·
n/kg looks to be "number of microplastic particles per kg". As you suggest, the rock salt microplastics are not caused by ocean microplastic pollution. So thos
by semi-extrinsic 8y ago
n/kg looks to be "number of microplastic particles per kg".
As you suggest, the rock salt microplastics are not caused by ocean microplastic pollution. So those numbers represent the "background noise", and if you will, microplastics found in sea salt are 20-30 dB above the "noise floor."
- semi-extrinsic 8y agoDid some more digging, and another study [1] on microplastics in shellfish gives this highly informative comparison: """Exposure during meals via dust fallout in a household is estimated at 13,731–68,415 particles per year""" So to match microplastic intake from dust falling on your food while eating, you'd have to consume at least 10 kg of salt per year in the case where your salt is fairly contaminated and your house is fairly clean (otherwise it would be even higher). FDA says salt intake should be below 1.5 kg (preferrably below 0.8 kg) per year. [1] https://www.sciencedirect.com/science/article/pii/S0269749117344445 https://www.sciencedirect.com/science/article/pii/S026974911...