Preparation method of granular oxide adsorbent, and water treatment method using same

Patent metadata

Field	Value
Publication number	US-9950310-B2
Application number	US-201214369335-A
Country	US
Kind code	B2
Filing date	Dec 28, 2012
Priority date	Dec 28, 2011
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

The present invention relates to a preparation method of a granular oxide adsorbent for water treatment in which a metal oxide is bound to the surface of polymer particles, and more specially, to a preparation method of a granular oxide adsorbent, comprising the following steps: putting polymer particles in an acidic solution; adding polymer particles to a metal oxide aqueous solution and adjusting a pH; and washing and drying the obtained product. Accordingly, a granular oxide adsorbent prepared by the preparation method is provided and is utilized in water treatment and the like.

First claim

The invention claimed is:

1. A method for preparing a granular oxide adsorbent, having metal oxide on an acid-treated surface of a polymer particle, comprising the steps of:
placing polymer particles in an acidic solution, thereby treating a surface of the polymer particle so that a metal oxide can be bound to the surface of the polymer particle;
washing the surface-treated polymer particles;
adding the surface-treated polymer particles to an aqueous metal oxide solution, adjusting the pH of the aqueous metal oxide solution to a range of from pH 5 to pH 10 while agitating the solution, thereby forming the metal oxide on the acid-treated surface of the polymer particle; and
washing and drying the polymer particles, having metal oxide on the acid-treated surface thereof;
wherein the metal oxide is one or more types selected from the group consisting of iron oxide, aluminum oxide, and titanium oxide.

2. The method for preparing a granular oxide adsorbent of claim 1 , wherein a polymer of the polymer particles to be treated with an acid in the acidic solution has a sulfonate group.

3. The method for preparing a granular oxide adsorbent of claim 2 , wherein the polymer of the polymer particles is sulfonated polystyrene.

4. The method for preparing a granular oxide adsorbent of claim 1 , wherein the acidic solution is one or more types selected from the group consisting of hydrochloric acid, nitric acid and sulfuric acid.

5. The method for preparing a granular oxide adsorbent of claim 4 , wherein a pH of the acidic solution ranges from pH 1 to pH 3.

6. The method for preparing a granular oxide adsorbent of claim 1 , wherein the metal oxide is one or more types selected from the group consisting of ferrihydrite, magnetite, hematite and goethite.

Assignees

• Kyungpook Nat Univ Ind Academic Coop Found

Inventors

• Choo Kwang-Ho

Classifications

• B01J20/265

  modified or post-treated polymers (polymer carriers or substrates subjected to further impregnating or coating B01J20/3208) · CPC title

• B01J20/28026

  Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin · CPC title

• B01D61/145

  Ultrafiltration · CPC title

• B01J20/30

  Processes for preparing, regenerating, or reactivating · CPC title

• B01J20/06 Primary

  comprising oxides or hydroxides of metals not provided for in group B01J20/04 · CPC title