Sources of Methyl Mercury Contamination in Oceans and Consumption Risks Paper

Problem 4 – Methyl mercury Contaminated FishMethylmercury (MM) is a common name for the organometallic cation [CH3Hg]+which is anenvironmental toxicant found in ocean waters as a result of anthropogenic releases. The EPA referencedose (RfD) for MM is 0.1 g/kgd. The average consumption of fish for a person with an average weightof 70 kg is 7.5 g/d and the bioconcentration factor (BCF) of MM in tuna fish is 106 l/kg.
1) Write a paragraph (no less than 100 words) explaining the possible sources of MM contaminationin the oceans? [Provide reference(s)].
2) Determine the MM concentration in fish (in g MM / kg of fish) that poses an unacceptablehealth risk to humans.
3) Assuming that the concentration of MM in tuna fish is equal to that determined above calculatethe maximum safe concentration of MM (in g/l) in ocean water.
4) Compare the aquatic concentration value for MM calculated in the previous step with actualvalues measured in the Pacific Ocean and comment.
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20190415221035lecture_notes_biomedia_water_partitioning (3 MB)