The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2008
Filed:
Dec. 02, 2005
Applicants:
Toru Ida, Kobe, JP;
Hiroshi Murakami, Kobe, JP;
Yutaka Inada, Kobe, JP;
Inventors:
Assignee:
Kabushiki Kaisha Kobe Seiko Sho, Hyogo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B09C 1/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed herein is a method for treatment of arsenic-contaminated soil, said method being capable of insolubilizing arsenic compounds (in organic form or tri- or pentavalent inorganic form), thereby reducing their leaching level below the environmental standard value for soil. The method consists of heating arsenic-contaminated soil at 200 to 700° C. and mixing the heated soil with a calcium compound and water. The method also consists of mixing arsenic-contaminated soil with a calcium compound, heating the mixed soil at 200 to 700° C., and mixing the heated soil with water.