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CH3041
ON-LINE LECTURE 6
TRACE METALS
•The transition metals are called trace metals when in the aquatic environment.
• Transition metal ions form coordination complexes. The most common ligands are aqua & hydroxo.     eg. [Cu(OH2)5(OH)]+
                           pentaaquahydroxocopper(II)
• The Hydrologic cycle erodes 60mm / y off the continents. This continental rock is transported at  » 0.5g / L in the rivers.
• Of this 80% is suspended solids (physical erosion) and 20% is dissolved species (chemical erosion).       defn.  filter 1.2mm