Title:
デカンタ分級による汚染土壌の固液分離比の測定方法、並びに、それを用いた汚染土壌の洗浄方法及び砒素汚染土壌の洗浄方法
Document Type and Number:
Japanese Patent JP6391011
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for measuring a solid-liquid separation ratio of contaminated soil by decanter classification in which a ratio of the purification soil can be increased, even if a ratio for microparticles is high, while reducing the weight of the processing soil exceeding an elution amount reference value, and provide a method for cleaning the contaminated soil and a method for cleaning the arsenic pollution soil.SOLUTION: A specific gravity of the contaminated soil ρ, a specific gravity ρfor solid recovery exceeding the classification point obtained by performing solid-liquid separation the contaminated soil using the decanter classification based on a predetermined classification point, and a specific gravity ρof the separation muddy water of the slurry shape containing a clear supernatant liquid separated for solid-liquid and for the microparticles not more than the classification point are measured, respectively. A solid fraction DSof the contaminated soil, a solid fraction DSfor the solid recovery, and a solid fraction DSof the separation muddy water are found, respectively. Further, a weight x for the solid recovery is found from the solid fraction DSof the contaminated soil, the solid fraction DSfor the solid recovery, and the solid fraction DSof the separation muddy water, and thereby a solid-liquid separation ratio (x:1-x) of the solid recovery and the separation muddy water is found.SELECTED DRAWING: Figure 2
Inventors:
Chie Yamamoto
Mitsuo Mouri
Kazuhiko Shitaku
Seiichi Ishinabe
Takashi Eguchi
Mitsuo Mouri
Kazuhiko Shitaku
Seiichi Ishinabe
Takashi Eguchi
Application Number:
JP2014264907A
Publication Date:
September 19, 2018
Filing Date:
December 26, 2014
Export Citation:
Assignee:
Shimizu Construction Co., Ltd.
International Classes:
G01N33/24; B03B5/28; B03B9/06; B09C1/00; B09C1/02; B09C1/08; C02F1/52; G01N9/36; G01N15/04
Domestic Patent References:
| JP2007283269A | ||||
| JP10212886A | ||||
| JP2014180595A | ||||
| JP2012110803A | ||||
| JP2012055798A |
Foreign References:
| US20030226788 |
Other References:
設樂和彦 他,泥水式シールド工事で発生する自然由来砒素汚染土壌の浄化技術の開発-微細粒分の分級装置の検討-,第20回地下水・土壌汚染とその防止対策に関する研究集会講演集,日本,一般社団法人一般土壌環境センター,2014年 6月,pp.231-236,S3-03
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Yoshifumi Saeki
Kenichi Kawabuchi
Tadashi Takahashi
Yoshifumi Saeki
Kenichi Kawabuchi