Floating type adsorbent for removal of phosphate in aqueous solution and method for fabricating the same and method for regeneration of the same

Patent metadata

Field	Value
Publication number	US-9295974-B2
Application number	US-201313900109-A
Country	US
Kind code	B2
Filing date	May 22, 2013
Priority date	Dec 27, 2012
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

The present disclosure relates to a floating type adsorbent for removal of phosphate that can effectively remove phosphate from aqueous phase through reaction between an amine function attached on the surface of a sponge and phosphate. This adsorbent can be regenerated by desorbing the adsorbed phosphate, a method for fabricating same and a method for regeneration the floating type adsorbent for removal of phosphate. The floating type adsorbent for removal of phosphate according to the present disclosure is fabricated by immersing a sponge in a mixture solution of an amine precursor and anhydrous toluene to form an amine function on the surface of the sponge. The amine precursor may be 3-aminopropyltriethoxysilane (APTES) and the APTES and the anhydrous toluene may be mixed at a volume ratio of 0.5-1:1.

First claim

What is claimed is:

1. A method for regeneration of a floating adsorbent for removal of phosphate, comprising:
preparing a floating adsorbent which comprises a sponge and an amine functional group provided on the surface of the sponge comprising immersing the sponge in a mixture solution of 3-aminopropyltriethoxysilane (APTES) and anhydrous toluene, wherein the APTES and the anhydrous toluene are mixed at a volume ratio of 0.5-1:1;
adsorbing phosphate from sewage or water using the floating adsorbent; and
immersing the floating adsorbent in a 0.5-1 v/v % sulfuric acid solution to remove the phosphate captured on the surface of the floating adsorbent.

2. The method for regeneration a floating type adsorbent for removal of phosphate according to claim 1 , wherein the floating type adsorbent for removal of phosphate is immersed in a 0.5-1 v/v % sulfuric acid solution for about 3 hours.

3. The method for regeneration a floating type adsorbent for removal of phosphate according to claim 1 , further comprising drying the floating type adsorbent in an oven for about 4 hours.

4. The method for regeneration a floating type adsorbent for removal of phosphate according to claim 1 , further comprising drying the floating type adsorbent in an oven for about 4 hours at a temperature of 60° C.

Assignees

• Korea Inst Sci & Tech

Inventors

• Hong Seok Won
• Lee Sanghyup
• Song Kyung Guen
• Jeong Eunhoo
• Choi Jae Woo

Classifications

• B01J20/26

  Synthetic macromolecular compounds · CPC title

• B01J20/3475 Primary

  in the liquid phase · CPC title

• B01J20/28045

  Honeycomb or cellular structures; Solid foams or sponges · CPC title

• B01J20/3257

  the functional group or the linking, spacer or anchoring group as a whole comprising at least one of the heteroatoms nitrogen, oxygen or sulfur together with at least one silicon atom, these atoms not being part of the carrier as such · CPC title

• B01J20/3231

  characterised by the coating or impregnating layer · CPC title