JPS5476481A - Treating method for waste solution containing heavy metal - Google Patents

Treating method for waste solution containing heavy metal

Info

Publication number
JPS5476481A
JPS5476481A JP14411177A JP14411177A JPS5476481A JP S5476481 A JPS5476481 A JP S5476481A JP 14411177 A JP14411177 A JP 14411177A JP 14411177 A JP14411177 A JP 14411177A JP S5476481 A JPS5476481 A JP S5476481A
Authority
JP
Japan
Prior art keywords
ferrite
precipitate
ferrous
heavy metals
added
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14411177A
Other languages
Japanese (ja)
Inventor
Izuru Sugano
Toshio Ishihara
Taneaki Okuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14411177A priority Critical patent/JPS5476481A/en
Publication of JPS5476481A publication Critical patent/JPS5476481A/en
Pending legal-status Critical Current

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  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To stabilize further ferrite precipitate formed through ferrite-process treatment of waste soln. containing heavy metals, by oxidizing the ferrite precipitate with addn. of specific amount of ferrous salt simultaneously with, or after, the completion of the ferrite-forming reaction.
CONSTITUTION: To a water soln. contg. heavy metals is added ferrous ion not less than twice the total number of mols of harmful metallic ions and alkali about equivalent to the total acid redicals contained in the waste slon. In order to oxidize the ferrous cpd. and to precipitate the ferrite having taken in the harmful metals. To the ferrite is added ferrous ion not less than 1/50 the ferrous ion having been added in the ferrite-forming reaction to oxidize the ferrous cpd. additionally. This treatment stabilizes the ferrite precipitate, and further decreases the elution of heavy metals other then Fe from the ferrite precipitate.
COPYRIGHT: (C)1979,JPO&Japio
JP14411177A 1977-11-30 1977-11-30 Treating method for waste solution containing heavy metal Pending JPS5476481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14411177A JPS5476481A (en) 1977-11-30 1977-11-30 Treating method for waste solution containing heavy metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14411177A JPS5476481A (en) 1977-11-30 1977-11-30 Treating method for waste solution containing heavy metal

Publications (1)

Publication Number Publication Date
JPS5476481A true JPS5476481A (en) 1979-06-19

Family

ID=15354431

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14411177A Pending JPS5476481A (en) 1977-11-30 1977-11-30 Treating method for waste solution containing heavy metal

Country Status (1)

Country Link
JP (1) JPS5476481A (en)

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