Title:
鉛含有坑外水の処理方法
Document Type and Number:
Japanese Patent JP7259620
Kind Code:
B2
Abstract:
To provide a lead-containing pit external water treatment method that solves the problem that, as there is a significant difference in concentration of heavy metal contained in a pit wastewater between the pit internal water and the pit external water, and the concentration of heavy metal in the pit external water is low, lead cannot be sufficiently removed by simple neutralization treatment.SOLUTION: Provided is a lead-containing pit wastewater treatment method in which the lead concentration in a wastewater is reduced by generating hydroxide precipitation by subjecting a wastewater to neutralization treatment, comprising: regarding a pit external water and a pit internal water, which are wastewater of a mine, adding the slurry generated by neutralization treatment of the pit internal water to the pit external water containing lead to make a mixed wastewater; and subjecting the mixed wastewater to neutralization treatment.SELECTED DRAWING: Figure 1
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Inventors:
Shota Nakayama
Hiroshi Hayashi
Hiroshi Hayashi
Application Number:
JP2019138400A
Publication Date:
April 18, 2023
Filing Date:
July 27, 2019
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C02F1/62
Domestic Patent References:
| JP2002282868A | ||||
| JP60161792A | ||||
| JP6246278A | ||||
| JP2014226654A | ||||
| JP2010269282A | ||||
| JP5007880A |
Foreign References:
| US20120193295 | ||||
| KR1020100083266A |
Attorney, Agent or Firm:
Chiba Hiroshi
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