Environmental Science 3300F/G Midterm: Midterm 3 Lecture Objective for Metals part 2
22 Mar 2018
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Give the principal mineral from which mercury is derived: extracted from cinnabar. Give the forms of hg and pb that can pass through animal tissue and cell membranes: methylated mercury can cross the blood-brain barrier. List the principal difference between mercury and the other toxic metals we have studied. Give the species in which mercury is considered to be especially toxic: hg vapour. Explain the role of bacteria in mobilizing mercury: bacteria will oxidize mercury into a soluble form to produce dimethyl and diethyl mercury both fat soluble. Explain the use of mercury in gold production: can be used to form an amalgam to extract small particles of gold and silver. Discuss the potential for mercury pollution resulting from the muskrat falls hydroelectric project: there are thoughts that this project will have the same type of outcome as james bay (methyl- mercury contamination)
