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Originally Posted by knotty panda
Seafood is closely monitored and would present the same contaminant levels as mollusks.
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No, not necessarily. That's why serious pollution monitoring uses the akoya oyster. The rate at which the mollusc filters water for nutrients is very high.
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The mollusk by-products would present a lesser amount of contamination. Thallium and cadmium are rapidly decaying contaminants and would dissipate before shells and pearls reach you. Mercury and lead decay at a much slower rate.
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Mollusc by products would have the same amounts of contamination.
The oysters are filtering thulium and cadmium at a constant rate so any decay would not apply if you were ingesting them(no thanks for me) and pearl handlers would be at risk for low to moderate toxicity. Thulium has a half life of 1.92 years, which is not a fast enough decay for contaminated akoya pearl necklaces, in my opinion, anyway.
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How much detective work does the Canadian government do to uncover such contaminants?
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We do not grow akoya oysters in Canada and we do not have a saltwater pearl industry, so studies were done where akoya oysters normally thrive.
Well. I must admit., my question is just a disguise for thought provocation.
Slraep