Method for degrading organic pollutant and recycling phosphate in chemical nickel-plating waste liquid

A technology of organic pollutants and electroless nickel plating, applied in chemical instruments and methods, phosphate, phosphorus oxyacids, etc., can solve the problems of serious pollution of electroless nickel plating wastewater and difficulty in resource recovery, and achieve thorough removal of organic matter and phosphorus , Process recovery of resources, high practical value effect

Inactive Publication Date: 2012-08-01
李朝林
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  • Summary
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Problems solved by technology

[0007] Aiming at the bottleneck of the prior art mentioned above, which causes serious pollution of electroless nickel plating waste water and difficult resource recovery, the present invention provides a method for processing and comprehensively utilizing electroless nickel plating waste liquid, which can treat the electroless nickel plating waste liquid up to the standard At the same time, phosphate is recovered from

Method used

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  • Method for degrading organic pollutant and recycling phosphate in chemical nickel-plating waste liquid
  • Method for degrading organic pollutant and recycling phosphate in chemical nickel-plating waste liquid

Examples

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example 1

[0042] Get 4 liters of electroless nickel plating waste liquid that nickel ion has been removed, containing COD 20800mg / L, total phosphorus is 18g / L, after it is filtered, add concentration and be 30% hydrogen peroxide (make H 2 o 2 Concentration is 55g / L), stirred by mechanical stirring, turn on the 80W UV lamp to irradiate the solution, start the oxidation reaction, turn off the UV lamp after 2.5 hours of reaction. Add 200g Al to the reacted solution 2 (SO 4 ) 3 Stirring was continued for 30 minutes, and finally the ferric phosphate and water were separated by filtration, and the separated ferric phosphate was dried at 105° C. for 3 hours to obtain dry ferric phosphate. The final effluent COD is 356mg / L, and dry AlPO is obtained 4 A total of 71g.

example 2

[0044] Get 4 liters of electroless nickel plating waste liquid that nickel ion has been removed, containing COD 26000mg / L, total phosphorus is 12g / L, after it is filtered, add concentration and be 30% hydrogen peroxide (make H 2 o 2 Concentration is 50g / L), stirred by mechanical stirring, turn on 80W ultraviolet light to irradiate the solution, start the oxidation reaction, turn off the ultraviolet light after 3 hours of reaction. Add 320g Fe in the reacted solution 2 (SO 4 ) 3 Stirring was continued for 30 minutes, and finally the ferric phosphate and water were separated by filtration, and the separated ferric phosphate was dried at 95° C. for 5 hours to obtain dry ferric phosphate. The final effluent COD is 451mg / L, and dry FePO is obtained 4 2H 2 O total 260g.

example 3

[0046] Get 4 liters of electroless nickel plating waste liquid, containing nickel ion 6.125g / L, COD 26000mg / L, total phosphorus is 12g / L, after it is filtered, add concentration and be 30% hydrogen peroxide (make H 2 o 2 Concentration is 50g / L), while adding 445g FeSO 4 ·7H 2 O, stirring by mechanical stirring, and reacting for 3 hours. After the reaction, the ferric phosphate and water were separated by filtration, and the separated ferric phosphate was dried at 95° C. for 5 hours to obtain dry ferric phosphate. The mother liquor after filtration uses ion-exchange resin to recover nickel sulfate, and the COD of the final effluent is 451mg / L to obtain dry FePO 4 2H 2 O total 260g.

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Abstract

The invention discloses a method for degrading organic pollutant and recycling phosphate in chemical nickel-plating waste liquid, which belongs to the technical field of environment-friendly waste water treatment and resource recycle. The method conducts oxidation degradation of organic pollutant in waste water through the oxidation technology, simultaneously oxidizes hypophosphorous acid radical and phosphorous acid radical in waste water into orthophosphate radical and recycles phosphate and nickel by enabling the orthophosphate radical and nonmetal or metal ions to be precipitated. The method achieves resource recycle while treating waste water and has good environment benefits and economical benefits and wide application prospect.

Description

technical field [0001] The invention discloses a method for recovering phosphate, which is used for sewage treatment and phosphorus resource recovery, and belongs to the technical field related to industrial waste treatment and resource utilization, in particular to a method for simultaneously degrading and recovering organic pollutants in chemical nickel plating waste liquid orthophosphate method. Background technique [0002] Electroless nickel plating is an industrial surface treatment process widely used at home and abroad. Electroless nickel plating has the advantages of uniform coating, corrosion resistance, high hardness, good wear resistance, no need for external power supply, and no special requirements for the shape of the plated parts, so it is obtained With the rapid development, electroless nickel plating is widely used in the surface treatment process of aerospace, machinery manufacturing, petrochemical industry, electronics industry, electric locomotive, plast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C01B25/26C02F103/16
Inventor 李朝林刘鹏崔海波陆钢
Owner 李朝林
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