Title:
METHOD FOR DETOXIFYING CONTAMINATED SOIL CONTAINING HEAVY METAL COMPOUND
Document Type and Number:
Japanese Patent JP3803870
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for detoxifying contaminated soil containing heavy metal compounds which efficiently removes heavy metals contained in the soil contaminated with the heavy metal compounds with relatively low energy and at a lower cost.
SOLUTION: Predetermined amount of silicone oil is mixed with the contaminated soil containing the heavy metal compounds, and the mixture is heated to not less than 600°C in an inert gas stream to decompose the silicone oil. Silicon (Si) caused by decomposition of the silicone oil reduces the heavy metal compounds in the contaminated soil to form single heavy metals or oxides thereof and vapor of these single heavy metals or oxides thereof is evaporated and removed from the contaminated soil. When the heavy metal compound is an arsenic compound, the arsenic oxide is formed by the reduction thereof and the vapor of the arsenic oxide is evaporated, and when the heavy metals are a lead, zinc or cadmium compound, single metals of these substances are formed by reduction thereof and the vapor of the single metals is evaporated and removed.
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Inventors:
Kenji Yasuda
Hamano Osamu
Ueda Kozo
Fukatsu Rei
Satoshi Iwamoto
Hamano Osamu
Ueda Kozo
Fukatsu Rei
Satoshi Iwamoto
Application Number:
JP2002210471A
Publication Date:
August 02, 2006
Filing Date:
July 19, 2002
Export Citation:
Assignee:
Hitachi Zosen Corporation
International Classes:
B09C1/02; B09C1/06; B09C1/08; (IPC1-7): B09C1/02; A62D3/00; B09C1/06; B09C1/08
Domestic Patent References:
| JP8173931A | ||||
| JP10113676A | ||||
| JP2000157961A | ||||
| JP2000344686A | ||||
| JP2001104932A | ||||
| JP2001259607A | ||||
| JP2002066499A | ||||
| JP2003340399A |
Attorney, Agent or Firm:
Einosuke Kishimoto
Akira Watanabe
Norihiko Hibi
Kiyosue Yasuko
Akira Watanabe
Norihiko Hibi
Kiyosue Yasuko