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US 2014/0374328 A1Published application
Adsorbent, method for producing adsorbent, and water treatment system
AssigneeKabushiki Kaisha Toshiba
InventorsAkiko SUZUKI, Hideyuki TSUJI
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Abstract
An adsorbent includes an inorganic porous material and a ligand provided on a surface of the inorganic porous material and having a bidentate nitrogen-containing chelating functional group. The adsorbent has an infrared absorption spectrum showing a peak derived from the ligand. The peak is observed near a wavenumber of from 1,375 cm−1 to 1,400 cm−1 and has a full width at half maximum of from 5 cm−1 to 50 cm−1.
Claims16
An adsorbent, comprising:
- an inorganic porous material;
- and
- a ligand provided on a surface of the inorganic porous material and having a bidentate chelating functional group containing nitrogen,
- the adsorbent having an infrared absorption spectrum showing a peak derived from the ligand, wherein the peak is observed near a wavenumber of from 1,375 cm−1 to 1,400 cm−1 and has a full width at half maximum of from 5 cm−1 to 50 cm−1.
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A method for producing an adsorbent, comprising:
- a coordinating metal ion to a chelating moiety of a silane coupling agent having a bidentate chelating functional group containing nitrogen;
- modifying a surface of a silica gel with the silane coupling agent to which the metal ion is coordinated;
- and
- removing the coordinated metal ion from the modified silica gel.
1 more element
A water treatment system, comprising:
- an adsorption unit having an adsorbent comprising an inorganic porous material and a ligand provided on a surface of the inorganic porous material and having a bidentate chelating functional group containing nitrogen, the adsorbent having an infrared absorption spectrum showing a peak derived from the ligand, wherein the peak is observed near a wavenumber of from 1,375 cm−1 to 1,400 cm−1 and has a full width at half maximum of from 5 cm−1 to 50 cm−1;
- a supply unit configured to supply, to the adsorption unit, a metal ion-containing medium to be treated;
- a discharge unit configured to discharge the treated medium from the adsorption unit;
- a measurement unit that is provided on at least one of a supply side or a discharge side of the adsorption unit and configured to measure the content of metal ions in the medium;
- and
- a control unit that is configured to reduce the amount of the medium supply from the supply unit to the adsorption unit when a value determined based on information from the measurement unit reaches a predetermined value.
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Dependencies are inferred from the claim text.