MD2305B2 - Process for consecutive separation of hard metals from sewage - Google Patents

Process for consecutive separation of hard metals from sewage Download PDF

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Publication number
MD2305B2
MD2305B2 MD20010260A MD20010260A MD2305B2 MD 2305 B2 MD2305 B2 MD 2305B2 MD 20010260 A MD20010260 A MD 20010260A MD 20010260 A MD20010260 A MD 20010260A MD 2305 B2 MD2305 B2 MD 2305B2
Authority
MD
Moldova
Prior art keywords
sewage
separation
hard metals
iii
ions
Prior art date
Application number
MD20010260A
Other languages
Romanian (ro)
Other versions
MD20010260A (en
MD2305C2 (en
Inventor
Constantin Bulimaga
Original Assignee
Constantin Bulimaga
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 Constantin Bulimaga filed Critical Constantin Bulimaga
Priority to MDA20010260A priority Critical patent/MD2305C2/en
Publication of MD20010260A publication Critical patent/MD20010260A/en
Publication of MD2305B2 publication Critical patent/MD2305B2/en
Publication of MD2305C2 publication Critical patent/MD2305C2/en

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Abstract

The invention relates to a technology for separation of hard metals from sewage, utilizing waste of galvanic productions. Summary of the invention consists in that it is proposed a process for separation of hard metals from sewage, including addition of an alkaline solution and precipitation of hard metals in the form of hydroxides at pH 4,8...5,4, removal of the formed sediment, where before addition of the alkaline solution into the sewage there is introduced metallic iron in a quantity of 5...10 times greater than the required stoichiometric quantity for Cu substitution from sewage, providing in a single process the complete separation of Cu ions, as well as of Al(III) and Fe(III) ions, the separation of the last being conditioned by the preliminary oxidation of Fe(II) in Fe(III).Claims: 1
MDA20010260A 2001-08-13 2001-08-13 Process for consecutive separation of hard metals from sewage MD2305C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MDA20010260A MD2305C2 (en) 2001-08-13 2001-08-13 Process for consecutive separation of hard metals from sewage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MDA20010260A MD2305C2 (en) 2001-08-13 2001-08-13 Process for consecutive separation of hard metals from sewage

Publications (3)

Publication Number Publication Date
MD20010260A MD20010260A (en) 2003-03-31
MD2305B2 true MD2305B2 (en) 2003-11-30
MD2305C2 MD2305C2 (en) 2004-05-31

Family

ID=19739929

Family Applications (1)

Application Number Title Priority Date Filing Date
MDA20010260A MD2305C2 (en) 2001-08-13 2001-08-13 Process for consecutive separation of hard metals from sewage

Country Status (1)

Country Link
MD (1) MD2305C2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5128047A (en) * 1990-04-20 1992-07-07 Rhone-Poulenc Inc. Sequential separation of metals by controlled pH precipitation
SU1794059A3 (en) * 1990-07-17 1993-02-07 Дheпpoпetpobckий Xиmиko-Texhoлoгичeckий Иhctиtуt Method for purifying waste water

Also Published As

Publication number Publication date
MD20010260A (en) 2003-03-31
MD2305C2 (en) 2004-05-31

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Legal Events

Date Code Title Description
KA4A Patent for invention lapsed due to non-payment of fees (with right of restoration)
MM4A Patent for invention definitely lapsed due to non-payment of fees