Title:
陰イオン吸着方法
Document Type and Number:
Japanese Patent JP6644805
Kind Code:
B2
Abstract:
The present invention addresses the problem of providing a method that further increases the phosphate-ion adsorption efficiency of an adsorbent that has an iron oxyhydroxide as a main component. According to this method, target anions are adsorbed by passing water that contains said anions and that has a fixed pH through an adsorption device that is filled with an anion adsorbent that has an iron oxyhydroxide as a main component. The method is characterized by being executed under conditions wherein the pH of water that is treated at a breakpoint becomes higher than the pH of the water pre-treatment. The treatment is preferably executed under conditions wherein the pH of the water that is treated at the breakpoint becomes at least 0.2 higher than the pH of the water pre-treatment.
Inventors:
Hirokawa
Nozomi Tsuyoshi
Nobuo Kimura
Masato Amaike
Nozomi Tsuyoshi
Nobuo Kimura
Masato Amaike
Application Number:
JP2017544200A
Publication Date:
February 12, 2020
Filing Date:
October 06, 2016
Export Citation:
Assignee:
Takahashi Metal Co., Ltd.
Nippon Soda Co., Ltd.
Nippon Soda Co., Ltd.
International Classes:
C02F1/42; B01J20/06; B01J20/28; B01J41/02; B01J41/10; B01J47/02; B01J49/14; B01J49/57; C02F1/28
Domestic Patent References:
| JP2011235222A | ||||
| JP2006305551A | ||||
| JP62289288A | ||||
| JP5513153A | ||||
| JP2005288439A |
Foreign References:
| US20080011686 | ||||
| US20100243571 |
Attorney, Agent or Firm:
Masaki Hirota
Seiji Ozawa
Yusaku Tokai
Kazuhiro Matsuda
Makoto Horiuchi
Masako Yamauchi
Shuichi Sonomoto
Akihiro Yamamura
Satoshi Morikawa
Hiroyuki Tomita
Seiji Ozawa
Yusaku Tokai
Kazuhiro Matsuda
Makoto Horiuchi
Masako Yamauchi
Shuichi Sonomoto
Akihiro Yamamura
Satoshi Morikawa
Hiroyuki Tomita