CN113912225A - Method for treating and recycling wastewater containing copper coke - Google Patents
Method for treating and recycling wastewater containing copper coke Download PDFInfo
- Publication number
- CN113912225A CN113912225A CN202010654834.XA CN202010654834A CN113912225A CN 113912225 A CN113912225 A CN 113912225A CN 202010654834 A CN202010654834 A CN 202010654834A CN 113912225 A CN113912225 A CN 113912225A
- Authority
- CN
- China
- Prior art keywords
- copper
- wastewater
- coke
- wastewater containing
- membrane
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C5/00—Electrolytic production, recovery or refining of metal powders or porous metal masses
- C25C5/02—Electrolytic production, recovery or refining of metal powders or porous metal masses from solutions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrolytic Production Of Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a method for treating and recycling wastewater containing copper coke, which comprises the following steps: s1, filtering the wastewater containing the copper tar by security to remove insoluble impurities in the wastewater containing the copper tar; s2, adding calcium hydroxide to carry out coagulation reaction; s3, filtering the wastewater through a UF membrane and an RO membrane by security, and then filtering the wastewater to obtain pure water so as to concentrate the wastewater containing the copper coke; s4, introducing the wastewater containing the copper tar into an ion exchanger for ion exchange; s5, filtering the coke copper-containing wastewater in the S4 again to remove insoluble impurities; s6, adding ferrous sulfate into the pyrocopper concentrated solution of S5 to perform coprecipitation and filtering to remove impurities; s6, introducing the concentrated solution for analyzing the pyrocopper into an electrolytic cell for electrolysis; and S7, when the electrolyte reaches the electrolytic limit, the rest electrolyte is carried out again in the operation steps S4 to S6. The method has the advantages that most of copper ions in the wastewater can be recycled after treatment, so that the cost is saved and heavy metal pollution is avoided.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for treating and recycling wastewater containing copper coke.
Background
The pyrocopper electroplating is also an important electroplating process, the pyrocopper electroplating is adopted in a plurality of combined electroplating processes, copper ions are bonded by chromium pyrophosphate in the pyrocopper electroplating cleaning water, so that the treatment difficulty of the pyrocopper cleaning water is increased, and the pyrocopper wastewater treated by the commonly adopted chemical precipitation almost cannot reach the standard. The current shunt copper is acid copper, pyrocopper and the like. The reposition of redundant personnel is fairly unscientific like this, and free copper ion in the sour copper is in the same place with burnt copper, has increased the processing degree of difficulty, when sour copper, burnt copper waste water sedimentation processing that is in the same place, throws NaOH and adjusts PH and deposit copper ion, and OH-ion is in fact strived for with pyrophosphate, and Cu2+ still can be equivalent Cu2+ according to the chemical principle of chemical equilibrium in the aquatic finally from this the waste water of discharging can cause serious heavy metal pollution.
Disclosure of Invention
The invention aims to provide a method for treating and recycling wastewater containing copper coke, which has the advantages that most of copper ions in the wastewater can be recycled through treatment, the cost is saved, heavy metal pollution cannot be caused, and the problems of acid copper, copper coke and the like in the existing shunting copper system are solved. The reposition of redundant personnel is fairly unscientific like this, and free copper ion in the sour copper is in the same place with burnt copper, has increased the processing degree of difficulty, when sour copper, burnt copper waste water sedimentation processing that is in the same place, throws NaOH and adjusts PH and deposit copper ion, and OH-ion is in fact strived for with pyrophosphate, and Cu2+ still can be equivalent Cu2+ according to the chemical principle of chemical equilibrium in the aquatic finally, and the waste water of discharging can cause serious heavy metal pollution's problem from this.
In order to achieve the purpose, the invention provides the following technical scheme: a method for treating and recycling wastewater containing copper coke comprises the following steps:
s1, filtering the wastewater containing the copper tar by security to remove insoluble impurities in the wastewater containing the copper tar;
s2, adding calcium hydroxide into the filtered wastewater containing the copper coke, enabling the wastewater containing the copper coke and the calcium hydroxide to carry out coagulation reaction, adjusting the pH value to 7-8, recovering excessive pyrophosphate ions in the wastewater, breaking the complexes, enabling copper ions to form copper hydroxide precipitates, and then filtering by security personnel to remove insoluble impurities;
s3, passing the decoking copper wastewater subjected to security filtration in the S2 through a UF membrane and an RO membrane to obtain pure water, and concentrating the decoking copper wastewater;
s4, introducing the concentrated copper wastewater containing coke into an ion exchanger to enable copper ions to be subjected to ion exchange with ion exchange resin, wherein the ion exchange resin is SO 42-type strong base anion exchange resin;
s5, carrying out security filtration on the copper-coke-containing wastewater subjected to ion exchange in the S4 again to remove insoluble impurities, passing through a UF membrane and an RO membrane to obtain pure water, and concentrating the copper-coke-containing wastewater again;
s6, adding ferrous sulfate into the concentrated solution of the pyrocopper generated in S5, reducing the copper into Cu2O by adding the ferrous sulfate when the pH value is 8-9 and enabling the copper to be in a relatively stable chelating state, wherein the iron exists in the form of divalent and trivalent hydroxides, Cu2O is adsorbed by utilizing the coagulation effect of the hydroxide of the iron, coprecipitation is carried out, insoluble impurities are removed by security filtration, then pure water is obtained after the insoluble impurities pass through a UF membrane and an RO membrane, and the wastewater containing the pyrocopper is concentrated
S7, conveying the concentrated solution to an electrolytic cell for electrolysis through a delivery pump, so that the residual copper complex in the S2 is completely broken, and copper ions in the solution generate ion migration and electrode reaction, namely the copper ions in the wastewater migrate to the cathode and generate reduction reaction on the cathode, so that metal is deposited;
and S8, when the electrolyte reaches the electrolytic limit, the rest electrolyte is carried out again in the operation steps S4 to S6.
Preferably, the reaction equation of the complex breaking reaction of the pyrocopper wastewater in S2 is as follows: P2O74- +2Ca2+ → Ca2P2O 7; the chemical coagulation reaction equation of the pyrocopper wastewater is as follows: cu2+ +2OH- → Cu (OH)2 ↓
Preferably, the exchange resin in S4 has an exchange reaction with copper ions and pyrophosphate ions in the copper-containing wastewater, and the reaction equation is as follows: 3(R ≡ N)2SO4+ [ Cu (P2O7)2]6 ═ R ≡ N)6[ Cu (P2O7)2] +3SO 42-.
Preferably, the anode of the electrolytic cell adopts a platinum-plated titanium plate, and the cathode adopts a thin copper sheet.
Preferably, in S8, the electrolytic limit is determined when the amount of copper ions in the electrolyte is less than 5 mg/L.
Compared with the prior art, the invention has the beneficial effects that: copper powder is generated after copper ions in the coke-containing copper wastewater are electrolyzed, so that the copper powder can be secondarily utilized, and the cost is greatly reduced; the copper ions can be recovered to the maximum extent by using the cyclic steps of ion exchange-electrolysis-re-ion exchange; the wastewater in the wastewater containing the copper coke is treated to become pure water which can be recycled in a workshop; in conclusion, the method for treating and recycling the wastewater containing the pyro-copper provided by the invention can electrolyze and oxidize pyrophosphate ions in the wastewater containing the pyro-copper to generate phosphate ions and electrolyze copper ions to generate copper powder. Thereby reducing the treatment cost, improving the economic benefit, well protecting the environment and having good popularization prospect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provided by the invention comprises the following steps:
a method for treating and recycling wastewater containing copper coke comprises the following steps:
s1, filtering the wastewater containing the copper tar by security to remove insoluble impurities in the wastewater containing the copper tar;
s2, adding calcium hydroxide into the filtered wastewater containing the pyrocopper to enable the wastewater containing the pyrocopper to have coagulation reaction with the calcium hydroxide, adjusting the pH to 7-8, recovering excessive pyrophosphate ions in the wastewater, and breaking the pyrophosphate ions to enable the copper ions to form copper hydroxide precipitates, and then removing insoluble impurities through security filtration again, wherein the breaking reaction equation of the wastewater containing the pyrocopper in S2 is as follows: P2O74- +2Ca2+ → Ca2P2O 7; the chemical coagulation reaction equation of the pyrocopper wastewater is as follows: cu2+ +2OH- → Cu (OH)2 ↓;
s3, passing the decoking copper wastewater subjected to security filtration in the S2 through a UF membrane and an RO membrane to obtain pure water, and concentrating the decoking copper wastewater;
s4, introducing the concentrated copper wastewater containing coke into an ion exchanger to enable copper ions to be subjected to ion exchange with ion exchange resin, wherein the exchange resin is SO 42-type strong base anion exchange resin, and the exchange resin in S4 is subjected to exchange reaction with copper ions and pyrophosphate ions in the copper wastewater containing coke, and the reaction equation is as follows: 3(R ≡ N)2SO4+ [ Cu (P2O7)2]6 ═ R ≡ N)6[ Cu (P2O7)2] +3SO 42-;
s5, carrying out security filtration on the copper-coke-containing wastewater subjected to ion exchange in the S4 again to remove insoluble impurities, passing through a UF membrane and an RO membrane to obtain pure water, and concentrating the copper-coke-containing wastewater again;
s6, adding ferrous sulfate into the concentrated solution of the pyrocopper generated in S5, reducing the copper into Cu2O by adding the ferrous sulfate when the pH value is 8-9, wherein the iron exists in the form of divalent and trivalent hydroxides, adsorbing Cu2O by utilizing the coagulation effect of the hydroxide of the iron, carrying out coprecipitation, removing insoluble impurities by security filtration, passing through a UF (ultraviolet) membrane and an RO (reverse osmosis) membrane to obtain pure water, and concentrating the wastewater containing the pyrocopper;
s7, conveying the pyrocopper analysis concentrated solution into an electrolytic tank through a conveying pump for electrolysis, so that the residual copper complex in the S2 is completely broken, copper ions in the solution generate ion migration and electrode reaction, namely, the copper ions in the wastewater migrate to a cathode and generate reduction reaction on the cathode, so that metal is deposited, a platinum-plated titanium plate is adopted as an anode of the electrolytic tank, a thin copper sheet is adopted as the cathode, and copper ions in the pyrocopper-containing wastewater generate copper powder after electrolysis, so that the copper powder can be reused, and the cost is greatly reduced;
and S8, when the electrolyte reaches the electrolytic limit, the rest electrolyte is carried out again in the operation steps S2 to S7, when the copper ions in the electrolyte are lower than 5mg/L, the copper ions can be recovered to the maximum extent by using the circulation steps of ion exchange-electrolysis-re-ion exchange.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. A method for treating and recycling wastewater containing copper coke is characterized by comprising the following steps:
s1, filtering the wastewater containing the copper tar by security to remove insoluble impurities in the wastewater containing the copper tar;
s2, adding calcium hydroxide into the filtered wastewater containing the copper coke, enabling the wastewater containing the copper coke and the calcium hydroxide to carry out coagulation reaction, adjusting the pH value to 7-8, recovering excessive pyrophosphate ions in the wastewater, breaking the complexes, enabling copper ions to form copper hydroxide precipitates, and then filtering by security personnel to remove insoluble impurities;
s3, passing the decoking copper wastewater subjected to security filtration in the S2 through a UF membrane and an RO membrane to obtain pure water, and concentrating the decoking copper wastewater;
s4, introducing the concentrated copper wastewater containing coke into an ion exchanger to enable copper ions to be subjected to ion exchange with ion exchange resin, wherein the ion exchange resin is SO 42-type strong base anion exchange resin;
s5, carrying out security filtration on the copper-coke-containing wastewater subjected to ion exchange in the S4 again to remove insoluble impurities, passing through a UF membrane and an RO membrane to obtain pure water, and concentrating the copper-coke-containing wastewater again;
s6, adding ferrous sulfate into the concentrated solution of the pyrocopper generated in S5, reducing the copper into Cu2O by adding the ferrous sulfate when the pH value is 8-9 and enabling the copper to be in a relatively stable chelating state, wherein the iron exists in the form of divalent and trivalent hydroxides, Cu2O is adsorbed by utilizing the coagulation effect of the hydroxide of the iron, coprecipitation is carried out, insoluble impurities are removed by security filtration, then pure water is obtained after the insoluble impurities pass through a UF membrane and an RO membrane, and the wastewater containing the pyrocopper is concentrated
S7, conveying the concentrated solution to an electrolytic cell for electrolysis through a delivery pump, so that the residual copper complex in the S2 is completely broken, and copper ions in the solution generate ion migration and electrode reaction, namely the copper ions in the wastewater migrate to the cathode and generate reduction reaction on the cathode, so that metal is deposited;
and S8, when the electrolyte reaches the electrolytic limit, the rest electrolyte is carried out again in the operation steps S4 to S6.
2. The method for treating and recycling the wastewater containing the copper coke according to claim 1, which is characterized in that: the complex breaking reaction equation of the pyrocopper wastewater in S2 is as follows: P2O74- +2Ca2+ → Ca2P2O 7; the chemical coagulation reaction equation of the pyrocopper wastewater is as follows: cu2+ +2OH- → Cu (OH)2 ↓.
3. The method for treating and recycling the wastewater containing the copper coke according to claim 1, which is characterized in that: the exchange resin in S4 has exchange reaction with copper ions and pyrophosphate ions in the copper-containing wastewater, and the reaction equation is as follows: 3(R ≡ N)2SO4+ [ Cu (P2O7)2]6 ═ R ≡ N)6[ Cu (P2O7)2] +3SO 42-.
4. The method for treating and recycling the wastewater containing the copper coke according to claim 1, which is characterized in that: the anode of the electrolytic bath adopts a platinized titanium plate, and the cathode adopts a thin copper sheet.
5. The method for treating and recycling the wastewater containing the copper coke according to claim 1, which is characterized in that: adding ferrous sulfate into a concentrated solution of the pyrocopper generated in S5, reducing the copper into Cu2O by adding the ferrous sulfate when the pH is 8-9 and the copper is in a relatively stable chelating state, wherein the iron exists in the form of divalent and trivalent hydroxides, adsorbing Cu2O by utilizing the condensation effect of the hydroxide of the iron, carrying out coprecipitation, removing insoluble impurities by security filtration, passing through a UF (ultra filtration) membrane and an RO (reverse osmosis) membrane to obtain pure water, and concentrating the wastewater containing the pyrocopper.
6. The method for treating and recycling the wastewater containing the copper coke according to claim 1, which is characterized in that: in S7, the electrolytic limit is defined as when the amount of copper ions in the electrolyte is less than 5 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010654834.XA CN113912225B (en) | 2020-07-09 | 2020-07-09 | Method for treating and recycling wastewater containing copper coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010654834.XA CN113912225B (en) | 2020-07-09 | 2020-07-09 | Method for treating and recycling wastewater containing copper coke |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113912225A true CN113912225A (en) | 2022-01-11 |
| CN113912225B CN113912225B (en) | 2023-10-10 |
Family
ID=79231870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010654834.XA Active CN113912225B (en) | 2020-07-09 | 2020-07-09 | Method for treating and recycling wastewater containing copper coke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113912225B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991991A (en) * | 2014-03-24 | 2014-08-20 | 厦门市韩江环保科技有限公司 | Treatment and recycling method for pyrophosphate copper-containing wastewater |
| CN104108812A (en) * | 2014-07-03 | 2014-10-22 | 苏州联科纳米净化科技有限公司 | Treating method for copper pyrophosphate electroplating wastewater |
| CN104692560A (en) * | 2015-03-03 | 2015-06-10 | 石泰山 | Method for treating phosphorus/phosphine-containing electroplating wastewater |
| WO2017080164A1 (en) * | 2015-11-09 | 2017-05-18 | 厦门市同利源电气设备有限公司 | Electroplating waste water processing process |
| CN108164041A (en) * | 2018-01-12 | 2018-06-15 | 中色奥博特铜铝业有限公司 | A kind of high-precision rolled copper foil Darkening process produces the processing method of waste water |
| CN111320302A (en) * | 2020-03-12 | 2020-06-23 | 江苏中电创新环境科技有限公司 | Process for standard emission and efficient sedimentation of low-concentration copper-containing wastewater in semiconductor industry |
-
2020
- 2020-07-09 CN CN202010654834.XA patent/CN113912225B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991991A (en) * | 2014-03-24 | 2014-08-20 | 厦门市韩江环保科技有限公司 | Treatment and recycling method for pyrophosphate copper-containing wastewater |
| CN104108812A (en) * | 2014-07-03 | 2014-10-22 | 苏州联科纳米净化科技有限公司 | Treating method for copper pyrophosphate electroplating wastewater |
| CN104692560A (en) * | 2015-03-03 | 2015-06-10 | 石泰山 | Method for treating phosphorus/phosphine-containing electroplating wastewater |
| WO2017080164A1 (en) * | 2015-11-09 | 2017-05-18 | 厦门市同利源电气设备有限公司 | Electroplating waste water processing process |
| CN108164041A (en) * | 2018-01-12 | 2018-06-15 | 中色奥博特铜铝业有限公司 | A kind of high-precision rolled copper foil Darkening process produces the processing method of waste water |
| CN111320302A (en) * | 2020-03-12 | 2020-06-23 | 江苏中电创新环境科技有限公司 | Process for standard emission and efficient sedimentation of low-concentration copper-containing wastewater in semiconductor industry |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113912225B (en) | 2023-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3926754A (en) | Electrochemical contaminant removal from aqueous media | |
| US4652352A (en) | Process and apparatus for recovering metals from dilute solutions | |
| CN103073123B (en) | Metal plating wastewater recycle using and recycling technology process | |
| KR100742088B1 (en) | A reusing method of copper nitrate waste water as etching solution and copper ingot by etching process | |
| JPS60106583A (en) | Method of treating aqueous flow containing precipitable material and acid and/or base | |
| CN111170526B (en) | Treatment method of ammonia nitrogen, phosphorus and arsenic in tungsten smelting wastewater | |
| CN103755082A (en) | System and method for resource recovery of regenerated wastewater of ion exchange resin | |
| JP6990348B1 (en) | How to recover and reuse nickel and phosphorus resources in electroless nickel plating waste liquid | |
| CN105923852A (en) | Steel pickling waste water treating process | |
| CN111792776A (en) | Deep treatment and recycling method for concentrated water after heavy metal wastewater treatment | |
| CN111304444A (en) | Treatment method for separating and recovering copper, iron, zinc, nickel and chromium from chromium-containing sludge | |
| CN103373779A (en) | Electroplating wastewater treatment equipment | |
| Senturk | The treatment of zinc-cyanide electroplating rinse water using an electrocoagulation process | |
| CN112429888A (en) | Method for recycling cadmium-containing heavy metal wastewater | |
| US6174444B1 (en) | Removal of pollutants from effluents with electrochemical treatment | |
| CN112159005A (en) | Treatment process and treatment system for aluminum processing anode waste liquid | |
| AU5537490A (en) | Method of electrolytic treatment and unit therefor | |
| CN113912225A (en) | Method for treating and recycling wastewater containing copper coke | |
| CN110980876A (en) | Treatment process for recovering copper and recycling chromium from passivation solution | |
| EA018147B1 (en) | Process and apparatus for precipitating cationic metal hydroxides and the recovery of sulfuric acid from acidic solutions | |
| CN111333152A (en) | Method for treating high-concentration nickel-phosphorus-containing organic waste liquid through electrolytic oxidation | |
| CN105731696B (en) | Silicon carbide pickling waste water reclaiming treatment process | |
| CN1942608B (en) | Recovery of Gallium | |
| CN113845267A (en) | Electric flocculation treatment method for natural bubble gas production wastewater | |
| CN114477573B (en) | Method for separating trivalent chromium and aluminum in aluminum sulfate solution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |