Kinetics of trace metal complexation: role of alkaline-earth metals.

  title={Kinetics of trace metal complexation: role of alkaline-earth metals.},
  author={J G Hering and François M M Morel},
  journal={Environmental science & technology},
  volume={22 12},
rn The rate of reaction of inorganic copper with the model ligand ethylenediaminetetraacetic acid (EDTA) is significantly retarded in the presence of calcium at seawater concentrations. The (pseudo-first-order) half-life for inorganic copper reacting with EDTA in seawater is -2 h at lo-' M EDTA. This kinetic hindrance to the formation of the thermodynamically favored CuEDTA species results from several factors: (1) the preponderance of the calcium complex in the speciation of EDTA, (2) the… CONTINUE READING


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