Contaminated soil purification method

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

Application Number:

JP2013064695A

Publication Date:

October 12, 2016

Filing Date:

March 26, 2013

Export Citation:

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Assignee:

Obayashi Corporation
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

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