ADSORPTION METHOD

The object of the present invention is to provide a method of selectively and efficiently adsorbing an anion such as a phosphate ion which adversely affect the environment when discharged without any treatment, or an anion which can be used beneficially when recovered, from waste water or a solution...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	NOISHIKI, Tsuyoshi, KIMURA, Nobuo, TATEISHI, Yuichi, TAKAHASHI, Yukiko, HIROKAWA, Toshiyasu
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F INORGANIC CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	The object of the present invention is to provide a method of selectively and efficiently adsorbing an anion such as a phosphate ion which adversely affect the environment when discharged without any treatment, or an anion which can be used beneficially when recovered, from waste water or a solution comprising such ion using an adsorbent.A method of adsorbing an anion of interest from an aqueous solution (A) containing the anion of interest and the other anion using an anion adsorbent, comprising performing at least (1) a step of contacting the aqueous solution (A) having a pH of 5.8 or less with the anion adsorbent to allow the anions to be adsorbed to the anion adsorbent, and then (2) a step of contacting water or an aqueous solution (B) having a pH of 5.2 to 11 with the anion adsorbent to desorb at least a part of the other anion adsorbed to the anion adsorbent from the anion adsorbent.