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You are here: Home / Explanatory Dictionary / Exhaustion

Exhaustion

the state of an ion exchange material in which it is no longer capable of effective function due to the depletion of the initial supply of exchangeable ions; the exhaustion point may be defined in terms of a limiting concentration of matter in the effluent, or in the case of demineralization, in terms of electrical conductivity.

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Water Quality Specialists

Definitioner

Ion Exchange
a reversible process in which ions are released from an insoluble permanent material in exchange for other ions in a surrounding solution; the direction of the exchange depends depends on the affinities of the ion exchanger for the ions present, and the concentrations of the ions in the solution.
Ion
an atom, or group of atoms which function as a unit, and has a positive or negative electrical charge, due to the gain or loss of of one or more electrons.
Exhaustion
the state of an ion exchange material in which it is no longer capable of effective function due to the depletion of the initial supply of exchangeable ions; the exhaustion point may be defined in terms of a limiting concentration of matter in the effluent, or in the case of demineralization, in terms of electrical conductivity.
Demineralization
the removal of ionized inorganic minerals and salts (not organic materials)from a solution by a two phase ion exchange procedure, similar to deionization, and the two terms are often used interchangeably.
Conductivity
the quality or power to carry electrical current; in water, the conductivity is related to the concentration of ions capable of carrying electrical current.