Title:
HEAVY METAL ANALOGS ELUTION PREVENTION METHOD FOR INCINERATION ASH
Document Type and Number:
Japanese Patent JP2020138175
Kind Code:
A
Abstract:
To provide a method for reducing elution amounts of a plurality of a heavy metal analogs including at least one kind selected from lead, cadmium, arsenic, selenium, hexavalent chromium, and total mercury involved in an incineration ash simultaneously to lower than a landfill disposal determination reference value even when the incineration ash has low pH or high pH.SOLUTION: The elution prevention method of heavy metal analogs including at least one kind of a group metal selected from lead, cadmium, arsenic, selenium, hexavalent chromium, and total mercury from an incineration ash is characterized by that a combination of a chelate agent and an elution inhibitor containing 100 pts.mass of calcium aluminate, 5-100 pts.mass of aluminum sulfate, 20-200 pts.mass of ferrous sulfate, and 0.5-10 pts.mass of alkali metal phosphate is added to an incineration ash.SELECTED DRAWING: None
Inventors:
ISODA HIDENORI
KANEKO TAIJI
KANEKO TAIJI
Application Number:
JP2019037451A
Publication Date:
September 03, 2020
Filing Date:
March 01, 2019
Export Citation:
Assignee:
TAIHEIYO MATERIAL KK
KYOWA CO LTD
KYOWA CO LTD
International Classes:
B09B3/00
Domestic Patent References:
| JP2014133865A | 2014-07-24 | |||
| JP2009028594A | 2009-02-12 | |||
| JP2013193039A | 2013-09-30 | |||
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| JP2017145294A | 2017-08-24 | |||
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| JPS63278589A | 1988-11-16 |
Attorney, Agent or Firm:
Alga Patent Office, a patent business corporation