Title:
ARSENIC SORBENT AND METHOD FOR REMEDIATING ARSENIC-CONTAMINATED MATERIAL
Document Type and Number:
WIPO Patent Application WO/2010/087297
Kind Code:
A1
Abstract:
Provided are an arsenate sorbent which has good arsenate-sorption performance and high sorbate stability, and a remediation method using the same.
Monohydrocalcite formed as a precipitate by mixing an aqueous solution, which contains Mg2+ ion and Ca2+ ion at a ratio (Mg/Ca) of 0.3 or more, with a soluble carbonic acid salt or an aqueous carbonic acid solution, characterized in that the molar ratio [Mg/(Ca+Mg)] in the monohydrocalcite is 0.1 or less.
Inventors:
FUKUSHI KEISUKE (JP)
SAKAI MINORU (JP)
MUNEMOTO TAKASHI (JP)
SAKAI MINORU (JP)
MUNEMOTO TAKASHI (JP)
Application Number:
PCT/JP2010/050880
Publication Date:
August 05, 2010
Filing Date:
January 25, 2010
Export Citation:
Assignee:
UNIV KANAZAWA NAT UNIV CORP (JP)
FUKUSHI KEISUKE (JP)
SAKAI MINORU (JP)
MUNEMOTO TAKASHI (JP)
FUKUSHI KEISUKE (JP)
SAKAI MINORU (JP)
MUNEMOTO TAKASHI (JP)
International Classes:
B01J20/04; C02F1/28; C01F11/18
Foreign References:
| JPH01127094A | 1989-05-19 |
Other References:
"Dai 17 Kai Symposium on Environmental Chemistry Program and Abstracts (2008)", 2008, article YUKA YOKOYAMA ET AL.: "Calcite eno Arsenious Acid to Arsenic Acid no Bunpai Kyodo no Hikaku", pages: 868 - 869
CIARDELLI MC. ET AL.: "Role of Fe(II), Phosphate, silicate, sulfate and carbonate in arsenic uptake by coprecipitation in synthetic and natural groundwater", WATER RESEARCH, vol. 42, no. 3, 2008, pages 615 - 624
CIARDELLI MC. ET AL.: "Role of Fe(II), Phosphate, silicate, sulfate and carbonate in arsenic uptake by coprecipitation in synthetic and natural groundwater", WATER RESEARCH, vol. 42, no. 3, 2008, pages 615 - 624
Attorney, Agent or Firm:
OTANI Kaichi (JP)
Kaichi Otani (JP)
Kaichi Otani (JP)
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