CN111362367A - Preparation of zinc oxide-loaded steel slag particle electrode and application of zinc oxide-loaded steel slag particle electrode in algae removal and algae inhibition - Google Patents
Preparation of zinc oxide-loaded steel slag particle electrode and application of zinc oxide-loaded steel slag particle electrode in algae removal and algae inhibition Download PDFInfo
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- C02F1/00—Treatment of water, waste water, or sewage
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Abstract
The invention discloses a preparation method of a zinc oxide-loaded steel slag particle electrode, which comprises the steps of mixing, granulating and calcining pretreated steel slag powder, montmorillonite powder and sawdust by a mixing granulation-calcining method, naturally drying in the air, calcining at high temperature to prepare the steel slag particle electrode serving as a carrier, and placing the steel slag particle electrode in Zn (NO) with a certain concentration by an ultrasonic impregnation-calcining method3)2And ultrasonically dipping the solution at room temperature, drying and then roasting to obtain the zinc oxide-loaded steel slag particle electrode. The zinc oxide-loaded steel slag particle electrode is used for treating an algae-containing water sample in a three-dimensional electrocatalytic oxidation device, and can generate a large amount of hydroxyl free radicals in a short time, so that the effects of efficiently removing algae and inhibiting algae for a long time are realized.
Description
Technical Field
The invention belongs to the technical field of resource utilization of solid wastes and water treatment, relates to preparation of water treatment materials, and particularly relates to a zinc oxide-loaded steel slag particle electrode, a preparation method thereof, and application of the obtained zinc oxide-loaded steel slag particle electrode in treatment of algae-containing water.
Background
The steel slag is solid waste generated in the steel industry, and the yield is about 8-15% of the yield of crude steel. The steel slag yield of China per year is thousands of tons, but the comprehensive utilization rate is less than 20 percent. A large amount of steel slag occupies land and pollutes the environment. The development of the comprehensive utilization technology of the steel slag is of great benefit to the elimination of environmental pollution and the realization of resource utilization. The steel slag mainly comprises oxides of elements such as calcium, iron, magnesium, aluminum, manganese, silicon, phosphorus and the like, and has higher impedance. The steel slag particles are fine, the surface and the inside of the steel slag particles are in porous structures, and the specific surface area is larger. These physical and chemical characteristics of steel slag determine its potential in water treatment applications.
Three-dimensional electrocatalytic oxidation is a novel advanced oxidation technology. Because a large number of particle electrodes are introduced, the effective area of the electrodes in the three-dimensional electrocatalytic oxidation system is larger, the mass transfer effect of the system is stronger, and the electrocatalytic oxidation efficiency is higher. In the three-dimensional electrocatalytic oxidation system, the reaction current needs to be increased, and the short-circuit current needs to be reduced to enhance the electrocatalytic oxidation effect, which is closely related to the properties of the particle electrode. Although there are reports of using steel slag as a raw material to prepare a particle electrode at present, optimization of a particle electrode preparation technology based on target pollutant removal control is mostly lacked, and a particle electrode with excellent performance is difficult to obtain, so that the removal effect on pollutants is poor.
The overgrowth of algae in water body can seriously affect water quality and landscape environment, and becomes one of important ecological environment problems. The algae killing mainly adopts the addition of chemical agents and a coagulation-precipitation method, but has the problems of chemical substance residue, influence on water quality and the like, and the search for novel algae removal and inhibition technologies is urgent. The research of the applicant finds that the removal and inhibition of algae by three-dimensional electrocatalytic oxidation by using the steel slag particle electrode can be an effective method, but no relevant literature report is found at present.
Disclosure of Invention
Aiming at the problems that the performance of the steel slag particle electrode is poor and the algae removal and inhibition performance in a three-dimensional electrocatalytic oxidation system is unknown at present, the invention aims to provide the steel slag particle electrode loaded with zinc oxide, a preparation method thereof and the application of the steel slag particle electrode loaded with zinc oxide in algae removal and inhibition of water.
In order to realize the task, the invention adopts the following technical solution:
the preparation method of the zinc oxide-loaded steel slag particle electrode is characterized by comprising the following steps:
(1) pretreating steel slag:
crushing the steel slag, sieving the crushed steel slag with a 200-mesh sieve, washing dust, silt and alkaline substances on the surface of the steel slag powder with pure water, and repeatedly washing until the pH value of a washing solution is stabilized between 8 and 9;
(2) preparing a steel slag particle electrode:
mixing the pretreated steel slag powder with montmorillonite powder and sawdust, wherein the mass ratio of the steel slag powder to the montmorillonite powder to the sawdust is 60: (25-30): (10-15); fully and uniformly mixing the materials to prepare particles with the diameter of 3-5 mm, naturally drying the particles for 24 hours, and calcining the particles for 15-120 min at the temperature of 500-900 ℃ to obtain a steel slag particle electrode;
(3) preparing a zinc oxide-loaded steel slag particle electrode:
taking a proper amount of steel slag particle electrodes, and pouring 20-40% of Zn (NO) by mass fraction3)2And (3) ultrasonically dipping the mixture in the solution for 0.5 to 2 hours at room temperature, drying the dipped mixture at 110 ℃, and roasting the dried mixture in a resistance furnace at the temperature of between 400 and 600 ℃ for 1 to 4 hours to obtain the zinc oxide-loaded steel slag particle electrode.
According to the invention, the mass ratio of the steel slag powder, the montmorillonite powder and the sawdust is 60: 28: 12, the calcining temperature is 700-800 ℃, and the calcining time is 60 min; the roasting temperature of the resistance furnace is 400 ℃, and the roasting time is 2 hours.
Furthermore, the zinc oxide-loaded steel slag particle electrode obtained by the method is a millimeter-scale magnetic particle electrode, the surface of the zinc oxide-loaded steel slag particle electrode contains folds and holes, and zinc oxide particles are uniformly loaded on the surface of the steel slag particle electrode.
The main component of the zinc oxide-loaded steel slag particle electrode is SiO2、Fe2O3、Fe3O4And ZnO.
Experiments of the applicant show that the obtained zinc oxide-loaded steel slag particle electrode is used for treating algae-containing water, can effectively remove algae cells in the water, and can inhibit the growth of the algae cells for a long time.
The innovation of the invention is that the zinc oxide-loaded steel slag particle electrode is prepared by using the steel slag, the cost is low, and the preparation process is simple. The obtained zinc oxide-loaded steel slag particle electrode is placed in a three-dimensional electrocatalytic oxidation device to be used as a working electrode, can be used for treating algae-containing water, can remove 86.61% of algae cells within 20min, and can inhibit the growth of the algae cells for a long time. Compared with the prior art, the method has obvious advantages in the aspects of improving the performance of the particle electrode and optimizing the preparation. The zinc oxide-loaded steel slag particle electrode is applied to a three-dimensional electrocatalytic oxidation system, so that the effects of short-time efficient algae removal and long-acting algae inhibition are realized, and the previous blank is filled.
Drawings
FIG. 1 is a flow chart of a preparation process and an application of a zinc oxide-loaded steel slag particle electrode.
Fig. 2 shows the algae removal effect of the steel slag particle electrode prepared by different raw material mass ratios, calcination temperatures and calcination times in a three-dimensional electrocatalytic oxidation system, wherein a shows the effect of different raw material mass ratios (steel slag powder: montmorillonite powder: saw powder: 60: 25: 15, steel slag powder: montmorillonite powder: saw powder: 60: 28: 12, and steel slag powder: montmorillonite powder: saw powder: 60: 30: 10). The b-diagram shows the effect of different calcination temperatures (500 deg.C, 600 deg.C, 700 deg.C, 800 deg.C, 900 deg.C). The c diagrams show the effects of different calcination times (15min, 30min, 60min, 90min and 120 min).
Fig. 3 shows the algae removal effect of the steel slag particle electrode and various modified steel slag particle electrodes (copper-loaded steel slag particle electrode, nickel-loaded steel slag particle electrode, aluminum-loaded steel slag particle electrode, zinc oxide-loaded steel slag particle electrode) in the three-dimensional electrocatalytic oxidation system respectively.
FIG. 4 shows the algae removal effect of the zinc oxide-loaded steel slag particle electrode prepared under different conditions of ultrasonic immersion time, immersion liquid concentration, roasting temperature, roasting time and the like in a three-dimensional electrocatalytic oxidation system. Wherein, a figure shows the algae removal effect of ultrasonic immersion time of 0.5h, 1h, 1.5h and 2h, and b figure shows that the immersion liquid is 20% Zn (NO)3)2Solution, 30% Zn (NO)3)2Solution, 40% Zn (NO)3)2The algae removal effect of the solution is shown in the c picture, the algae removal effect is shown in the c picture, the roasting temperature is 400 ℃, 500 ℃ and 600 ℃, and the algae removal effect is shown in the d picture, the roasting time is 1h, 2h, 3h and 4 h.
FIG. 5 shows X-ray diffraction patterns of steel slag particle electrodes and zinc oxide-loaded steel slag particle electrodes. Wherein, a picture is a steel slag particle electrode map, and b picture is a steel slag particle electrode map loaded with zinc oxide.
Fig. 6 is an SEM photograph of a zinc oxide-loaded steel slag particle electrode. Wherein, the graph a is magnified 500 times, the graph b is magnified 5000 times, the graph c is magnified 10000 times, and the graph d is magnified 50000 times.
FIG. 7 is a diagram of a homemade three-dimensional electrocatalytic oxidation apparatus, wherein (a) is a schematic diagram and (b) is a picture of a real object, and the marks in the diagram respectively represent ① electrolytic cell, ② anode, ③ cathode, ④ particle electrode net box and ⑤ DC stabilized power supply.
FIG. 8 is a comparison of the algae removal performance of the steel slag particle electrode and the zinc oxide-loaded steel slag particle electrode.
FIG. 9 shows the comparison of the algae inhibiting performance of the steel slag particle electrode and the zinc oxide-loaded steel slag particle electrode.
FIG. 10 is a fluorescence spectrum and fluorescence intensity of 0.5mmol/L terephthalic acid solution electrolyzed by a three-dimensional electrocatalytic oxidation system at different moments as a function of electrolysis time. Wherein, a picture is a two-dimensional electrode system, b picture is a steel slag particle electrode system, and c picture is a steel slag particle electrode system loaded with zinc oxide.
The present invention will be described in further detail with reference to the following drawings and examples.
Detailed Description
Referring to fig. 1, this example provides a method for preparing a zinc oxide-loaded steel slag particle electrode, in which a mixed granulation-calcination method is used to mix and granulate pretreated steel slag powder, montmorillonite powder and sawdust, then the mixture is naturally air-dried, and the steel slag particle electrode prepared by high-temperature calcination is used as a carrier, and is placed in a certain concentration of Zn (NO) by an ultrasonic impregnation-calcination method3)2Ultrasonic immersion in solution at room temperatureSoaking, drying and roasting to obtain the zinc oxide-loaded steel slag particle electrode.
The specific implementation process is as follows:
1. apparatus and reagent
(1) Scanning electron microscope
(2) X-ray diffractometer
(3) Flame atomic absorption spectrometer
(4) Fluorescence spectrophotometer
(5) Electric heating constant temperature blast air drying box
(6) Vertical high-pressure sterilizing pot
(7) Illumination incubator
(8) Steel slag powder: provided by the iron and steel group ltd, south china.
(9) Montmorillonite powder: provided by the firm city yuan Heng water purification material factory.
(10) Saw powder grinding: provided by the monarch wood industry.
(11) Zinc nitrate (Zn (NO)3)2·6H2O): analytically pure, purchased from chemical reagents ltd, miuiou, department of Tianjin.
(12) Terephthalic acid (C)8H6O4): analytically pure, purchased from Fochen chemical reagent factory, Tianjin.
(13) Common chlorella: purchased from institute of aquatic organisms, academy of sciences, china.
2. Reagent preparation
Preparation of BG11 culture medium: BG11 culture medium powder 1.7g was weighed, dissolved in 1L water and sterilized with high pressure steam at 121 deg.C for 20 min.
3. Preparation method
According to the preparation process flow shown in fig. 1, the specific steps for preparing the zinc oxide-loaded steel slag particle electrode are as follows:
(1) pretreating steel slag:
crushing the steel slag, sieving the crushed steel slag with a 200-mesh sieve, washing dust, silt and alkaline substances on the surface of the steel slag powder with pure water, and repeatedly washing until the pH value of a washing liquid is stabilized between 8 and 9.
(2) Preparing a steel slag particle electrode:
through a large number of experiments, the apparent conditions and the electrocatalytic oxidation algae removal rate of the steel slag particle electrode prepared under the conditions of different raw material mass ratios, calcination temperatures, calcination times and the like are compared, and the specific results are shown in tables 1-3 and fig. 2.
TABLE 1
TABLE 2
TABLE 3
According to the experimental result of the applicant, the concrete preparation conditions of the steel slag particle electrode are determined as follows: the pretreated steel slag powder, montmorillonite powder and sawdust are mixed according to the proportion of 60%: 28%: fully and uniformly mixing 12% of the raw materials in mass ratio to prepare particles with the diameter of 3-5 mm, naturally drying the particles for 24 hours, and calcining the particles for 60min at 700-800 ℃ to prepare a steel slag particle electrode;
(3) preparing a zinc oxide-loaded steel slag particle electrode:
through the experiments of the applicant, the best effect of the steel slag particle electrode loaded with zinc oxide is determined by comparing the algae removal effect of the steel slag particle electrode loaded with different substances in a three-dimensional electrocatalytic oxidation system (figure 3).
Further, through the experiments of the applicant, the algae removal rate of the zinc oxide-loaded steel slag particle electrode prepared in different ultrasonic impregnation times (fig. 4a), impregnation liquid concentrations (fig. 4b), roasting temperatures (fig. 4c) after impregnation and roasting times (fig. 4d) in a three-dimensional electrocatalytic oxidation system is compared, and the factors such as energy consumption and the like are comprehensively considered. Finally, the specific preparation conditions of the zinc oxide-loaded steel slag particle electrode are determined as follows: adding proper amount of steel slagThe particle electrode is placed in 30% Zn (NO)3)2And ultrasonically dipping the mixture in the solution for 1h at room temperature, then drying the mixture at 110 ℃ and roasting the dried mixture for 2h at 400 ℃ to obtain the zinc oxide-loaded steel slag particle electrode.
4. Material characterization
The crystal composition of the particle electrode is analyzed by adopting an X-ray diffractometer, a Cu target K α line is taken as a radiation source, the accelerating voltage and the applied current are respectively 40kV and 40mA, the scanning range is 5-90 degrees, and the X-ray diffraction pattern determination analysis is carried out, and the figures 5(a) and 5(b) are respectively the XRD patterns of the steel slag particle electrode and the steel slag particle electrode loaded with zinc oxide.
It can be seen that the main diffraction peak in the steel slag particle electrode corresponds to SiO2、Fe2O3And Fe3O4Wherein Fe corresponds to at 2 θ of 33.2 ° and 35.6 °2O3The diffraction peak of (1), Fe was detected at 2 θ of 30.1 °, 43.1 °, 53.4 °, 57.0 °, 62.6 °3O4Characteristic peak of (2). The zinc oxide-loaded steel slag particle electrode still has SiO2、Fe2O3And Fe3O4The intensity of the diffraction peak corresponding to the main characteristic peak of the steel slag particle electrode is weakened. Particularly, relatively sharp diffraction peaks appear at positions of 31.8 degrees, 34.3 degrees, 36.2 degrees, 47.4 degrees, 56.5 degrees, 62.9 degrees, 67.9 degrees and 69.1 degrees at the angle of 2 theta, which accords with the diffraction characteristic spectrum of ZnO with a hexagonal wurtzite structure. This indicates that zinc nitrate forms zinc oxide crystals at high temperature when the firing temperature is 400 ℃. Therefore, the main component of the zinc oxide-loaded steel slag particle electrode is SiO2、Fe2O3、Fe3O4And ZnO.
The surface morphology of the obtained zinc oxide-loaded steel slag particle electrode was observed by a scanning electron microscope, and the measurement voltage was 6 kV. FIG. 6 is an SEM photograph of a zinc oxide-loaded steel slag particle electrode, wherein a is a magnification of 500 times; b is 5000 times of magnification; the magnification of the graph c is 10000 times, and the magnification of the graph d is 50000 times.
It can be seen that the zinc oxide-loaded steel slag particle electrode surface has many holes and wrinkles, which provides a large specific surface area for the zinc oxide loading, and from the photograph magnified by 50000 times (fig. 6d), it can be clearly seen that very dense white substances, i.e. ZnO particles, are distributed on the surface.
0.5g of the zinc oxide-loaded steel slag particle electrode is digested and diluted by 1000 times, and the concentration of zinc is 0.8640mg/L by adopting a flame atomic absorption spectrometer, so that the mass percent of ZnO in the zinc oxide-loaded steel slag particle electrode can be calculated to be 10.75%.
5. Three-dimensional electrocatalytic oxidation device
FIG. 7a is a schematic diagram of a three-dimensional electrocatalytic oxidation device, and b is a physical photograph, wherein the three-dimensional electrocatalytic oxidation device is a self-made square reactor and comprises an electrolytic bath ①, the size of the electrolytic bath is 6cm × 5cm × 8cm, and the effective volume of the electrolytic bath is 240 mL.
An anode × 0 and a cathode × 1 are placed in an electrolytic bath ①, in the embodiment, ruthenium-iridium-titanium is selected as a material of the anode ②, a titanium plate is selected as a material of the cathode ③, the sizes of the titanium plate are 50mm × 90mm × 1mm, the distance between the anode ② and the cathode ③ is set to be 4 cm., the prepared zinc oxide-loaded steel slag particle electrode is filled in a particle electrode mesh box ④, then the steel slag particle electrode is placed between the anode ② and the cathode ③, and a direct current stabilized voltage power supply × 2 is externally connected to obtain the three-dimensional electrocatalytic oxidation device.
6. Algae removal and inhibition performance test
The chlorella vulgaris is taken as a tested algae species, the algae removal and algae inhibition performance of the zinc oxide-loaded steel slag particle electrode is evaluated by the algae cell removal rate, and the following formula is calculated:
in the formula: c0The cell density of algae before the three-dimensional electrocatalytic oxidation treatment of the algae-containing water sample is shown by 109Per liter; ctThe cell density of algae at t moment in the three-dimensional electrocatalytic oxidation treatment of the algae-containing water sample is shown by 109And (2) per liter.
The density of algae cells in logarithmic growth phase is 108Per liter to 109Adding electrolyte into per L of algae-containing water sample, and dissolving uniformly. Shown in FIG. 7a6g of steel slag particle electrode and 6g of zinc oxide-loaded steel slag particle electrode are respectively added into a particle electrode mesh box ④ in the three-dimensional electrocatalytic oxidation device, 180mL of the algae-containing water sample is added, an external direct current stabilized power supply ⑤ is started to start the electrocatalytic oxidation reaction, and the density of algae cells in the water sample is measured at different moments in the electrocatalytic oxidation process.
FIG. 8 shows the cell density of algae after the three-dimensional electrocatalytic oxidation treatment, it can be seen that the three-dimensional electrocatalytic oxidation system using the steel slag particle electrode and the system using the zinc oxide-loaded steel slag particle electrode can achieve a removal rate of algae cells of more than 97% after the water sample containing algae is treated for a long time (e.g., 60min), however, they show a difference in short-time algae removal9a/L and 7.60 × 108The removal rate of algae cells reaches 58.86 percent and 86.61 percent respectively; in a system using the steel slag particle electrode, the removal rate of the algae cells can reach 87.49 percent only after 30 min. Therefore, the electrocatalytic oxidation activity of the zinc oxide-loaded steel slag particle electrode is superior to that of the steel slag particle electrode, and the efficient algae removal can be realized in a short time.
The applicant researches the algae inhibiting performance of a three-dimensional electrocatalytic oxidation system using a zinc oxide-loaded steel slag particle electrode through a comparative experiment. After a short electrocatalytic oxidation time (10min) treatment, the algae-containing water sample was continuously cultured under normal conditions and sampled to determine the cell density of algae, the results are shown in fig. 9. The algae-containing water sample which is subjected to three-dimensional electrocatalytic oxidation treatment by the zinc oxide-loaded steel slag particle electrode has the advantages that the cell density of algae is not obviously increased all the time in the subsequent culture, and the cell density of algae is only 23.04 percent of that of a control group when the algae is cultured to the 8 th day. The three-dimensional electrocatalytic oxidation system using the steel slag particle electrode has no algae inhibiting effect. This shows that the short treatment of the three-dimensional electrocatalytic oxidation system using the zinc oxide-loaded steel slag particle electrode can generate a long-acting inhibition effect on the growth of algae.
7. Electrocatalytic oxidation capacity test
In the electrocatalysisThe method comprises the following steps of collecting OH generated by a three-dimensional electrocatalytic oxidation system by using terephthalic acid, reacting with the OH to generate a product 2-hydroxy terephthalic acid with high fluorescence, and characterizing the OH generation capacity by measuring the fluorescence intensity of the product, wherein ruthenium-iridium-titanium is used as an anode ②, a titanium plate is used as a cathode ③, and 0.5mmol/L of terephthalic acid +0.5g/L of NaOH +0.25mol/L of Na are respectively used in the test process2SO4The solution is electrolyte with a volume of 180mL and a current density of 30mA/cm2. Sampling 5mL every 10min, detecting 2-hydroxy terephthalic acid by adopting a fluorescence spectrophotometer, wherein the excitation wavelength is 315nm, the emission wavelength is 425nm, the recording range of a fluorescence spectrum is 370-520 nm, and the resolution is 1 nm.
FIGS. 10 a, b and c are fluorescence spectra corresponding to the two-dimensional electrode, steel slag particle electrode, and zinc oxide-loaded steel slag particle electrode system when 0.5mmol/L terephthalic acid is electrolyzed at different times. It can be seen that the fluorescence signals in the systems are gradually increased along with the time extension in the electrified 1h, which indicates that OH is generated in the two-dimensional and three-dimensional electrocatalytic systems and is increased continuously. When the electrolysis is carried out for 30min, the fluorescence intensities of the two-dimensional electrode, the steel slag particle electrode and the zinc oxide-loaded steel slag particle electrode system are 161.9, 201.8 and 283.6 respectively; the fluorescence intensities of the three were 234.9, 338 and 589.9, respectively, at 60min of electrolysis. By comparison, the three-dimensional electrocatalytic oxidation system using the zinc oxide-loaded steel slag particle electrode of the present example was found to have significantly higher ability to generate OH than the other two.
In summary, the zinc oxide-loaded steel slag particle electrode provided in this embodiment has the following significant advantages in preparation and application:
(1) the zinc oxide-loaded steel slag particle electrode has the advantages of wide source of raw materials, low price, simple preparation process and easy operation;
(2) the three-dimensional electrocatalytic oxidation system using the zinc oxide-loaded steel slag particle electrode has high hydroxyl radical yield, the algae cell removal rate reaches 86.61% after 20min of electrocatalytic oxidation treatment, and short-time and high-efficiency algae removal can be realized;
(3) the three-dimensional electrocatalytic oxidation system of the zinc oxide-loaded steel slag particle electrode is used for temporarily treating the algae-containing water sample, so that the long-acting inhibition effect on the growth of algae can be generated.
Claims (6)
1. The preparation method of the zinc oxide-loaded steel slag particle electrode is characterized by comprising the following steps:
(1) pretreating steel slag:
crushing the steel slag, sieving the crushed steel slag with a 200-mesh sieve, washing dust, silt and alkaline substances on the surface of the steel slag powder with pure water, and repeatedly washing until the pH value of a washing solution is stabilized between 8 and 9;
(2) preparing a steel slag particle electrode:
mixing the pretreated steel slag powder with montmorillonite powder and sawdust, wherein the mass ratio of the steel slag powder to the montmorillonite powder to the sawdust is 60: (25-30): (10-15); fully and uniformly mixing the materials to prepare particles with the diameter of 3-5 mm, naturally drying the particles for 24 hours, and calcining the particles for 15-120 min at the temperature of 500-900 ℃ to obtain a steel slag particle electrode;
(3) preparing a zinc oxide-loaded steel slag particle electrode:
taking a proper amount of steel slag particle electrodes, and pouring 20-40% of Zn (NO) by mass fraction3)2And (3) ultrasonically dipping the mixture in the solution for 0.5 to 2 hours at room temperature, drying the dipped mixture at 110 ℃, and roasting the dried mixture in a resistance furnace at the temperature of between 400 and 600 ℃ for 1 to 4 hours to obtain the zinc oxide-loaded steel slag particle electrode.
2. The method according to claim 1, wherein the mass ratio of the steel slag powder, the montmorillonite powder and the sawdust is 60: 28: 12, the calcining temperature is 700-800 ℃, and the calcining time is 60 min; the roasting temperature of the resistance furnace is 400 ℃, and the roasting time is 2 hours.
3. The method according to claim 1 or 2, wherein the zinc oxide-loaded steel slag particle electrode is a millimeter-sized magnetic particle electrode, the surface of the zinc oxide-loaded steel slag particle electrode contains wrinkles and holes, and zinc oxide particles are uniformly loaded on the surface of the steel slag particle electrode.
4. The method according to claim 1 or 2, wherein the zinc oxide-loaded steel slag particle electrode comprises SiO as a main component2、Fe2O3、Fe3O4And ZnO.
5. The zinc oxide-loaded steel slag particle electrode prepared by the method according to any one of claims 1 to 4.
6. The zinc oxide-loaded steel slag particle electrode of claim 5 is applied to algae removal and algae inhibition in water treatment.
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