Physics
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.3635m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 57, Issue 15, pp.3635-3640
Physics
11
Scientific paper
The interactions of divalent metal ions with the common metastable sedimentary iron monosulfide mineral mackinawite were investigated in dilute solutions and seawater. The surface affinities of metals whose sulfide phases are more soluble than mackinawite are similar, whereas those metals whose sulfide phases are less soluble than mackinawite exhibit an increasing surface affinity with decreasing solubility. Adsorption of metals from dilute solutions and seawater was the same, within our experimental uncertainty, and not strongly sensitive to temperature. The partition coefficients of metals in mackinawite strongly increase with decreasing metal solubility and are very temperature sensitive. These results are interpreted as indicating that mackinawite is potentially a major temporary sink for many trace metals during early diagenesis in anoxic sediments.
Arakaki Takeshi
Morse John W.
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