chelation therapy
Treatment with a chelating agent to enhance the elimination or reduce the toxicity of a metal ion.
chelation : A chemical complexing (forming or joining together) of metallic cations (such as copper) with certain organic compounds, such as EDTA (ethylene diamine tetracetic acid).
A coordination complex in which more than one atom or molecule (often an organic compound) binds to a metal. In the environment, chelation effectively removes the metal: it is no longer available for chemical interactions or to biota.
sequestration A chemical complexing (forming or joining together) of metallic cations (such as iron) with certain inorganic compounds, such as phosphate. Sequestration prevents the precipitation of the metals (iron). Also see chelation.
 See also: Toxic, Carbon dioxide, Species, Criteria, Sorption
  
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