Title:
Contaminated soil purification method
Document Type and Number:
Japanese Patent JP6007144
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To efficiently purify excavated soil including heavy metal at a low cost.SOLUTION: The method for purifying contaminated soil comprises: an iron powder addition step of adding iron powder 36 for heavy metal adsorption to excavated soil 2 including heavy metal produced in excavation work; and an iron powder separation step of feeding the excavated soil 2 including the iron powder 36 adsorbed with the heavy metal to a centrifugal separator 15 and separating the iron powder 36 adsorbed with the heavy metal from the excavated soil 2 by the centrifugal separator 15.
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Inventors:
Tetsu Nakamura
Adachi Kuniyasu
Yoichi Moriya
Naoya Takada
Yoshiaki Ishii
Yusaku Aoyama
Toshihiko Miura
Tsutomu Kimura
Fumihiro Nagai
Adachi Kuniyasu
Yoichi Moriya
Naoya Takada
Yoshiaki Ishii
Yusaku Aoyama
Toshihiko Miura
Tsutomu Kimura
Fumihiro Nagai
Application Number:
JP2013064695A
Publication Date:
October 12, 2016
Filing Date:
March 26, 2013
Export Citation:
Assignee:
Obayashi Corporation
Keihin Soil Co., Ltd.
Keihin Soil Co., Ltd.
International Classes:
B01J20/02; B09C1/02; B03B5/34; B03C1/00; B03C1/02; B09C1/00; B09C1/08; E02F7/00
Domestic Patent References:
JP2000051835A | ||||
JP2003126836A | ||||
JP2000202422A | ||||
JP2005028244A | ||||
JP2007268424A | ||||
JP2005111342A |
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation