CN112941581B - Method for treating concrete by using copper plating wastewater - Google Patents
Method for treating concrete by using copper plating wastewater Download PDFInfo
- Publication number
- CN112941581B CN112941581B CN202110116686.0A CN202110116686A CN112941581B CN 112941581 B CN112941581 B CN 112941581B CN 202110116686 A CN202110116686 A CN 202110116686A CN 112941581 B CN112941581 B CN 112941581B
- Authority
- CN
- China
- Prior art keywords
- concrete
- copper
- electrolyte
- electrodeposition
- concentration
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/54—Electroplating of non-metallic surfaces
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/18—Electroplating using modulated, pulsed or reversing current
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a method for treating concrete by using copper-plating wastewater, which comprises the following steps: a: sequentially settling, acidifying or alkalizing the copper industrial wastewater to adjust the pH value of the waste liquid to 5-7, purifying and concentrating; b: adding a surfactant into the obtained wastewater treatment liquid according to the concentration of 100-200mg/L to prepare electrolyte, wherein the concentration of copper ions in the electrolyte is 2000-5000 mg/L; c: immersing a concrete test piece into electrolyte, connecting an electrochemical device, using the electrochemical device as a cathode, and performing first-step electrodeposition; d: and after the first-step electrodeposition is finished, adding a lactic acid solution into the electroplating solution, adjusting the pH value to 10-12, and performing second-step electrodeposition. The binding power between the prepared electro-deposition material and the concrete matrix is higher; the formed sediment has good bactericidal performance and improves the anti-microbial corrosion capability of concrete.
Description
Technical Field
The invention belongs to the technical field of corrosion resistance treatment of concrete structures, and particularly relates to a method for treating concrete by using copper-plated wastewater.
Background
Microbial corrosion is one of the major causes of damaged concrete sewer pipes. Sewage and sludge layers accumulated at the bottom of the pipeline contain a large amount of bacteria, wherein sulfate reducing bacteria and sulfate oxidizing bacteria have serious harm to concrete. Sulfuric acid generated by the metabolism of the calcium sulfate and the calcium sulfate reacts with cement to generate expansive ettringite and gypsum on one hand, and micro cracks are generated in concrete; on the other hand, the reaction consumes a large amount of Ca (OH)2The pH value of the concrete is reduced, and the steel bar passive film is damaged. The microbial attack of concrete not only causes great economic losses but also severely damages the structural safety of the sewer line. Many scholars aim at the corrosion process and mechanism of microorganisms to concreteA great deal of research is carried out, and a series of measures are taken on the basis of the research to protect the concrete from microbial corrosion.
The coating technology can play an effective antibacterial and anticorrosive effect at the initial stage of concrete use, but because the bonding property of the coating material and the concrete surface is poor, under the scouring action of sewage flow, the concrete surface coating can be peeled off and fall off, and the anticorrosive effect at the later stage of use is very poor. In addition, for the existing pipelines which are corroded, the coating method is difficult to implement and high in cost, and the corroded concrete surface has poorer bonding performance with the coating material and is difficult to play a role in long-term corrosion prevention.
In order to enhance the binding force between the protective layer and the concrete matrix, cuprous oxide is deposited on the inner side of the pipeline by using an electrochemical deposition method. The preparation of cuprous oxide by the electrodeposition method is convenient and fast, and the cuprous oxide can form stronger binding force with the surface of concrete under the action of an electric field. However, the cost of copper sulfate in the current electrodeposition solution is high, and the problem of high operation cost is also faced when the copper oxide is electrodeposited on a concrete substrate, which is a novel technology.
Disclosure of Invention
Aiming at the problem of microbial corrosion of the existing concrete sewage pipeline, the invention provides a method for improving the antibacterial performance of concrete by using copper-plated wastewater. In addition, the invention can also treat industrial wastewater, reduce the concentration of heavy metal ions in the wastewater and facilitate the discharge and recycling of the wastewater.
The technical purpose is achieved, the technical effect is achieved, and the invention is realized through the following technical scheme:
a method for treating concrete by using copper plating wastewater comprises the following steps:
a: sequentially settling, acidifying or alkalizing the copper industrial wastewater to adjust the pH value of the waste liquid to 5-7, purifying and concentrating;
b: adding a surfactant into the obtained wastewater treatment liquid according to the concentration of 100-200mg/L to prepare electrolyte, wherein the concentration of copper ions in the electrolyte is 2000-5000 mg/L;
c: immersing a concrete test piece into electrolyte, connecting an electrochemical device, using the electrochemical device as a cathode, and performing first-step electrodeposition;
d: and after the first-step electrodeposition is finished, adding a lactic acid solution into the electroplating solution, adjusting the pH value to 10-12, and performing second-step electrodeposition.
As a further improvement of the invention, after the first electrodeposition is finished, the concentration of copper ions in the electrolyte is not higher than 500 mg/L.
As a further improvement of the invention, the first electrodeposition process comprises the following steps: adopting a direct current power supply with the output voltage of 20-50V, applying current density of 1.5-2.5mA/cm2 to the cathode, and electrolyzing for 35-40 h.
Preferably, the output voltage is 30V, and the current density is 1.5mA/cm 2.
As a further improvement of the invention, the second-step electrodeposition process comprises the following steps: adopting a pulse power supply to carry out electrolysis, wherein the parameters of the pulse power supply are as follows: the pulse frequency is 500Hz-1000Hz, and the duty ratio is 0.4-0.6.
As a further improvement of the invention, the surfactant is selected from cationic surfactants.
Preferably, the surfactant is any one of cetyl trimethyl ammonium bromide and sodium dodecyl benzene sulfonate.
As a further improvement of the invention, in the step D, the molar ratio of the added lactic acid to the copper ions in the electrolyte is 4: 1-6: 1.
As a further improvement of the invention, the electrochemical device also comprises an electrochemical workstation and a titanium net, wherein the titanium net is connected with the anode of the electrochemical workstation through a metal wire to be used as an anode, and the steel bar in the concrete is connected with the cathode of the electrochemical workstation through a metal wire to be used as a cathode.
The invention has the beneficial effects that:
(1) the preparation method of the antimicrobial concrete protective coating provided by the invention realizes the electrolysis of the high-concentration copper plating solution through the improvement measures of step-by-step electrodeposition, surfactant addition and the like, effectively improves the content of copper element on the surface of the concrete, and simultaneously can form a complete coating on the surface of the concrete through controlling the electrolysis time and the concentration of the electrolyte, and also avoids local generation of convex nodules and damage to the integrity of the copper and copper oxide coatings caused by overlong electrodeposition time.
(2) Compared with the coating in the prior art, the coating has higher binding power between the prepared electro-deposition and the concrete matrix; the formed sediments comprise cuprous oxide, copper oxide and copper simple substances, all have good bactericidal performance, can effectively inhibit the growth and reproduction of sulfate reducing bacteria and sulfate oxidizing bacteria, prevent the generation of biological sulfuric acid, effectively improve the durability of a concrete structure in a sewage environment and improve the antimicrobial corrosion capacity of concrete. Meanwhile, under the action of an electric field, copper ions also enter the interior of the concrete, so that the impermeability of the concrete is improved.
(3) The method adopts the copper-containing industrial wastewater to replace the traditional copper sulfate solution, not only can obviously reduce the electrodeposition cost, but also can realize the reutilization of waste resources and reduce the pollution of the copper-containing industrial wastewater to the environment.
Drawings
FIG. 1 is a schematic structural view of an apparatus used for carrying out the production method of the present invention;
FIG. 2 is a surface coating picture of samples obtained in examples 1 to 4 and comparative example;
FIG. 3 is SEM images and EDS images of samples obtained in examples 1 to 4 and comparative example;
FIG. 4 shows the results of the corrosion resistance tests of examples 1 to 4, comparative example and untreated test pieces.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
A: wastewater treatment: copper-containing industrial wastewater enters a water preparation tank 2 from a water inlet 1, enters a pH adjusting tank 3 after large-particle solid impurities in the wastewater are subjected to primary sedimentation treatment, is subjected to alkalization treatment on acidic waste liquid, is subjected to acidification treatment on alkaline waste liquid, and is adjusted to pH 5-7; the wastewater after the adjustment treatment enters an activated carbon adsorption reaction column 4 for purification treatment, and is mainly used for adsorbing and removing strong oxidizing substances and partial organic matters in the wastewater, and the purified wastewater enters a copper ion concentration reactor 7 through a water pump 5, so that the concentration of the concentrated copper ions reaches more than 5000 mg/L.
Wherein, the concentration reactor 7 adopts a multi-layer nanofiltration membrane structure, the nanofiltration membrane is made of aromatic polyamide and quaternary ammonium salt composite materials, and the operation is carried out under the pressure of 1.0 MPa.
The present invention takes the copper plating wastewater produced by certain electroplating plant of Nanjing as an example, and the composition of the wastewater is shown in Table 1.
TABLE 1 micro-treatment of wastewater composition
The composition of the treated wastewater is shown in Table 2.
TABLE 2 composition of the treated wastewater
B. Preparing an electrolyte: cetyl trimethyl ammonium bromide is selected as a surfactant, and is added into the treated copper plating wastewater in proportion to prepare electrolyte. The concentration of copper ions in the prepared electrolyte is 2-5g/L, and the concentration of cetyl trimethyl ammonium bromide is 0.1-0.2g/L
C. Electroplating a concrete sample piece:
the first embodiment is as follows:
the concentration of copper ions in the electrolyte was set to 5000 mg/L.
Concrete with built-in reinforcing steel bars 10 is immersed in electrolyte, the reinforcing steel bars built in the concrete are used as cathodes, a titanium mesh 13 is used as an anode, and the concrete is connected with the titanium mesh through copper leads 12Connecting with electrochemical workstation 11, and performing electrodeposition, wherein the distance between the anode and the concrete is 30mm, the output voltage of the DC power supply is 30V, and the current density applied to the cathode by the DC power supply is 1.5mA/cm2The first electrodeposition time was 48 hours. A copper coating is deposited on the surface of the concrete by a first electrodeposition step.
After the first step of electrodeposition, the concentration of copper ions in the electrolyte is reduced to 485mg/L, lactic acid solution is added into the electrolyte, the concentration of lactic acid is 5 times (mol ratio) of the concentration of copper ions, and NaOH of 1mol/L is added to adjust the pH of the solution to 11. And then adopting a pulse power supply to carry out electrodeposition for 12 hours, wherein the pulse frequency of the pulse power supply is 500Hz, and the duty ratio is 0.4. And (4) generating a copper-cuprous oxide composite coating on the surface of the concrete through the second step of electrodeposition.
The resulting sample of treated concrete is labeled Y1.
Example two:
the concentration of copper ions in the electrolyte was set at 2000 mg/L.
Immersing concrete with built-in reinforcing steel bars in electrolyte, taking the reinforcing steel bars built in the concrete as a cathode and taking a titanium mesh as an anode, and carrying out electrodeposition, wherein the distance between the anode and the concrete is 30mm, the output voltage of a direct current power supply is 30V, and the current density applied to the cathode by the direct current power supply is 1.5mA/cm2The first electrodeposition time was 48 hours.
After the first step of electrodeposition, the concentration of copper ions in the electrolyte is reduced to 265mg/L, lactic acid solution is added into the electrolyte, the concentration of lactic acid is 5 times (mol ratio) of the concentration of copper ions, and NaOH of 1mol/L is added to adjust the pH of the solution to 11. And then adopting a pulse power supply to carry out electrodeposition for 12 hours, wherein the pulse frequency of the pulse power supply is 500Hz, and the duty ratio is 0.4.
The resulting sample of treated concrete is labeled Y2.
Example three: the concentration of copper ions in the electrolyte was set to 500 mg/L.
Immersing the concrete with built-in steel bars in electrolyte, taking the steel bars built in the concrete as a cathode and taking a titanium mesh as an anode, and carrying out electrodeposition, wherein the steel bars are arranged between the anode and the concreteThe distance is 30mm, the output voltage of the DC power supply is 30V, and the current density applied to the cathode by the DC power supply is 1.5mA/cm2The first electrodeposition time was 48 hours.
After the first step of electrodeposition, the concentration of copper ions in the electrolyte is reduced to 95mg/L, lactic acid solution is added into the electrolyte, the concentration of lactic acid is 5 times (mol ratio) of the concentration of copper ions, and 1mol/L NaOH is added to adjust the pH value of the solution to 11. And then adopting a pulse power supply to carry out electrodeposition for 12 hours, wherein the pulse frequency of the pulse power supply is 500Hz, and the duty ratio is 0.4.
The resulting sample of treated concrete is labeled Y3.
Example four: the applied current density of the direct current electrodeposition is 2.5mA/cm2Current of
The concentration of copper ions in the electrolyte was set to 5000 mg/L.
Immersing concrete with built-in reinforcing steel bars in electrolyte, taking the reinforcing steel bars built in the concrete as a cathode and taking a titanium mesh as an anode, and carrying out electrodeposition, wherein the distance between the anode and the concrete is 30mm, the output voltage of a direct current power supply is 30V, and the current density applied to the cathode by the direct current power supply is 2.5mA/cm2The first electrodeposition time was 48 hours.
After the first step of electrodeposition, the concentration of copper ions in the electrolyte is reduced to 355mg/L, lactic acid solution is added into the electrolyte, the concentration of lactic acid is 5 times (mol ratio) of the concentration of copper ions, and NaOH of 1mol/L is added to adjust the pH of the solution to 11. And then adopting a pulse power supply to carry out electrodeposition for 12 hours, wherein the pulse frequency of the pulse power supply is 500Hz, and the duty ratio is 0.4.
The resulting sample of treated concrete is labeled Y4.
Control group 1: cetyl trimethyl ammonium bromide is not added into the electrolyte, and the current parameters in the two-step electrodeposition process are the same as those in the first embodiment. The resulting sample of treated concrete is labeled C1.
And (3) performance testing:
1. observation of the surface coating: the surface topography of each sample piece shown in fig. 2 was observed to see if the sample piece surface of the treated concrete was completely covered with a purple-red deposit and if the concrete pores were filled with green metal oxide. Wherein the mauve deposit is a copper-cuprous oxide mixture, and the green metal oxide is copper hydroxide; taking 2 x 0.5mm slices on the surface of the concrete, grinding the slices into powder, and testing the content of copper elements in the deposited test piece by adopting ICP-OES; the information reflected by the surface topography pictures of the various samples in fig. 2 is counted, and the statistical results are detailed in table 3.
TABLE 3 statistical results of surface deposits on samples Y1-Y4 and C1
As can be seen from the data of fig. 2 and table 3, the surfactant can ensure that a complete coating is formed on the surface of the concrete and can also promote the penetration of copper ions into the interior of the test piece. Meanwhile, the concentration of copper ions in the electrolyte and electrolysis parameters can influence the deposition amount of the copper ions in the waste liquid and the surface uniformity of the coating.
2. Scanning Electron microscopy and Spectroscopy testing (SEM-EDS)
SEM observation and simultaneous energy spectrum analysis were performed on samples Y1, Y2, Y3, Y4, and C1, and the obtained SEM image and EDS image are shown in fig. 3. The result shows that when the initial copper ion concentration is 5000mg/L and 2000mg/L, the settled layer on the surface of the concrete test piece is still compact and complete on the microscopic layer, and when the initial copper ion concentration is 500mg/L, the settled layer on the surface of the test piece is incomplete and has partial pores. Further, when the current density is increased to 2.5mA/cm2, it is possible to cause coarsening of crystal grains, accumulation of the surface of deposit, and generation of fine cracks on the surface of plating due to internal stress. Excessive current density results in poor surface coating integrity and affects coating durability. In the test piece without the surfactant, the surface deposition layer is accumulated, and partial pores exist.
3. And (3) testing the corrosion resistance: sulfate Reducing Bacteria (SRB) resistance tests were performed on untreated concrete specimen C0, control specimen C1, and specimens Y1, Y3, and Y4. SRB adopts Desulfovibrio (number MCCC 1K03478) bacteria purchased from China Marine microorganism Collection, and the SRB bacteria are expanded and cultured three timesBecome black and emit H after a day2S gas, C0 and C1, Y1, Y3 and Y4 were then placed in the bacterial solution, and after 10 days, the change in the number of SRB bacteria was observed under a 400-fold microscope using a hemacytometer, and the change in the bacterial solution was observed.
As can be seen from FIG. 4, after 10 days, a large amount of SRB still existed in the medium containing test piece C0, only a small amount of bacteria grew in the medium containing test pieces C1 and Y3, and almost no SRB grew in the medium containing concrete test pieces Y1 and Y4, indicating that the concrete surface containing copper and the oxide coating of copper had a strong antibacterial effect. The result shows that the copper and the copper oxide coating can obviously inhibit the growth and the propagation of SRB, and the surfactant is added into the solution to ensure that copper ions can realize effective electrolysis in the high-concentration solution, so that an electroplated layer with uniform thickness and integrity is formed on the surface of the concrete test piece, and a good sterilization effect is achieved.
It should be noted that although the inhibitory effect on the number of bacteria shown in fig. 4, Y4 was superior to Y1, the test results for 10 days tested in this test were within the expected range in view of the highest total copper content of Y4, which produced a slight advantageous effect compared to Y1 in the early stage of the test. However, as time goes on, the negative effects of cracks on the surface of the Y4 coating will appear, affecting the durability of Y4. Therefore, the general comparison shows that the biological corrosion resistance of Y1 is better than that of Y4.
4. Besides, the treatment effect of the industrial wastewater is tested
The test method comprises the following steps: ICP-OES analysis is adopted to test the content of copper ions in the solution, and the result shows that the concentration of the copper ions in the sewage after 2 times of circulation treatment is not higher than 40mg/L, and the removal rate of the copper ions in the sewage is higher than 97%.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The method for treating concrete by using copper plating wastewater is characterized by comprising the following steps of:
a: sequentially settling, acidifying or alkalizing the copper industrial wastewater to adjust the pH value of the waste liquid to 5-7, purifying and concentrating;
b: adding a surfactant into the obtained wastewater treatment liquid according to the concentration of 100-200mg/L to prepare electrolyte, wherein the concentration of copper ions in the electrolyte is 2000-5000 mg/L;
c: immersing a concrete test piece into electrolyte, connecting an electrochemical device, using the electrochemical device as a cathode, and performing first-step electrodeposition; the concrete test piece comprises a steel bar;
the first step of electrodeposition comprises the following steps: applying a DC power supply with an output voltage of 20-50V to the cathode at a current density of 1.5-2.5mA/cm2The electrolysis time is 35-40 h;
d: after the first-step electrodeposition is finished, adding a lactic acid solution into the electroplating solution, adjusting the pH value to 10-12, and performing second-step electrodeposition;
the second step of electrodeposition comprises the following steps: adopting a pulse power supply to carry out electrolysis, wherein the parameters of the pulse power supply are as follows: the pulse frequency is 500Hz-1000Hz, and the duty ratio is 0.4-0.6;
the molar ratio of the added lactic acid to the copper ions in the electrolyte is 4: 1-6: 1.
2. the method for treating concrete by using copper-plating wastewater as claimed in claim 1, wherein: and after the first-step electrodeposition is finished, the concentration of copper ions in the electrolyte is not higher than 500 mg/L.
3. The method for treating concrete by using copper-plating wastewater as claimed in claim 1, wherein: the output voltage is 30V, and the current density is 1.5mA/cm2。
4. The method for treating concrete by using copper-plating wastewater as claimed in claim 1, wherein: the surfactant is selected from cationic surfactants.
5. The method for treating concrete by using copper-plating wastewater as claimed in claim 4, wherein: the surfactant is cetyl trimethyl ammonium bromide.
6. The method for treating concrete by using copper-plating wastewater as claimed in claim 1, wherein: the electrochemical device further comprises an electrochemical workstation and a titanium net, wherein the titanium net is connected with the anode of the electrochemical workstation through a metal wire to serve as an anode, and the steel bar in the concrete is connected with the cathode of the electrochemical workstation through the metal wire to serve as a cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110116686.0A CN112941581B (en) | 2021-01-27 | 2021-01-27 | Method for treating concrete by using copper plating wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110116686.0A CN112941581B (en) | 2021-01-27 | 2021-01-27 | Method for treating concrete by using copper plating wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112941581A CN112941581A (en) | 2021-06-11 |
| CN112941581B true CN112941581B (en) | 2022-04-08 |
Family
ID=76238521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110116686.0A Active CN112941581B (en) | 2021-01-27 | 2021-01-27 | Method for treating concrete by using copper plating wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112941581B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737231B (en) * | 2021-09-07 | 2023-04-28 | 河海大学 | Electrodeposition liquid for concrete microbial corrosion and preparation method and repair method thereof |
| CN114015300B (en) * | 2021-10-25 | 2023-10-13 | 华麟海(海南)新材料科技有限公司 | Concrete protective coating capable of sterilizing and adsorbing sulfate ions and preparation method thereof |
| CN113846362B (en) * | 2021-10-27 | 2023-10-27 | 河海大学 | Preparation method of composite coating for inhibiting concrete corrosion |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL128730C (en) * | 1962-03-06 | |||
| KR100667037B1 (en) * | 2006-07-10 | 2007-01-11 | 김권기 | Manufacture method for beauty device that have antibacterial and sterilization function |
| WO2012039285A1 (en) * | 2010-09-24 | 2012-03-29 | Jx日鉱日石金属株式会社 | Method for manufacturing copper foil for printed circuit board and copper foil for printed circuit board |
| CN104418408A (en) * | 2013-08-30 | 2015-03-18 | 上海轻工业研究所有限公司 | Copper-electroplating wastewater treatment method and copper-electroplating wastewater treatment equipment |
| US20190259722A1 (en) * | 2018-02-21 | 2019-08-22 | Rohm And Haas Electronic Materials Llc | Copper pillars having improved integrity and methods of making the same |
-
2021
- 2021-01-27 CN CN202110116686.0A patent/CN112941581B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112941581A (en) | 2021-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112941581B (en) | Method for treating concrete by using copper plating wastewater | |
| Yin et al. | The growth process of the cake layer and membrane fouling alleviation mechanism in a MBR assisted with the self-generated electric field | |
| Yang et al. | Electrochemical and biochemical profiling of the enhanced hydrogenotrophic denitrification through cathode strengthening using bioelectrochemical system (BES) | |
| Haavisto et al. | Effects of anode materials on electricity production from xylose and treatability of TMP wastewater in an up-flow microbial fuel cell | |
| CN111424300A (en) | Method for improving antimicrobial corrosion performance of concrete | |
| CN110339733B (en) | Graphene oxide/polyaniline composite membrane and application thereof | |
| CN1903752A (en) | Method of nitrosation electrochemical back nitrosation full autotrophic deammoniacal nitrogen and its reactor | |
| Ebrahimi et al. | Co-treatment of septage and municipal wastewater in a quadripartite microbial desalination cell | |
| CN101269863A (en) | Apparatus and method for removing phosphor and organic matter in sewage water with electric flocculation membrane bioreactor | |
| Ho et al. | Bio-electrochemical system for recovery of silver coupled with power generation and wastewater treatment from silver (I) diammine complex | |
| CN102874960A (en) | Device and method for treating high-salinity and degradation-resistant organic industrial waste water by performing photoelectrical synchro coupling and catalytic oxidation on three-dimensional particles | |
| Viet et al. | Enhancing the removal efficiency of osmotic membrane bioreactors: A comprehensive review of influencing parameters and hybrid configurations | |
| CN1131341C (en) | Process for scaling on alloy steel surface | |
| CN113200584A (en) | Electrode material and device for electrochemically treating circulating cooling water | |
| Al-saned et al. | Microbial fuel cells (MFC) in the treatment of dairy wastewater | |
| CN1047155C (en) | New technology for treating electroplating waste water with micro-organism | |
| Yang et al. | Effect of Alcaligenes sp. and sulfate-reducing bacteria on corrosion of Q235 steel in simulated marine environment | |
| Zang et al. | Alleviating membrane fouling by enhanced bioelectricity generation via internal reflux of sludge mixed liquor in microbial fuel cell-membrane bioreactor (MFC-MBR) coupling system | |
| CN111635067B (en) | Ultraviolet-assisted ultrasonic coupling electrocatalytic oxidation water treatment system and water treatment method | |
| Zhu et al. | Antibacterial performance of electrodeposited Cu@ Cu2O coatings on concrete using printed circuit board wastewater | |
| CN102887606A (en) | Garbage leachate treatment method using direct current flocculation-MBR (membrane bioreactor) | |
| Abd-almohi et al. | Study of Microbial Desalination Cell Performance; Power Generation and Desalination Efficiency using Pure Oxygen in a Cathode Chamber | |
| CN114011251B (en) | Conductive film for efficiently removing nitrate in water and preparation method thereof | |
| CN113737231B (en) | Electrodeposition liquid for concrete microbial corrosion and preparation method and repair method thereof | |
| CN113968602A (en) | Method for removing nitrified nitrogen in water through electro-catalysis |
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 |