CN113896315A - Application of FePC strip in degradation of methylene blue dye wastewater - Google Patents
Application of FePC strip in degradation of methylene blue dye wastewater Download PDFInfo
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- CN113896315A CN113896315A CN202111333799.2A CN202111333799A CN113896315A CN 113896315 A CN113896315 A CN 113896315A CN 202111333799 A CN202111333799 A CN 202111333799A CN 113896315 A CN113896315 A CN 113896315A
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- methylene blue
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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Abstract
The invention discloses an application of a FePC strip in methylene blue wastewater. The method comprises the following steps: mixing Fe85P5C10Remelting the commercial strips to form cast ingots, controlling the chamber of the vacuum melt-spun machine to reach proper air pressure, carrying out melt-spinning under the protection of argon, and obtaining Fe85P5C10The strip is put into methylene blue dye wastewater to degrade the methylene blue solution. Original Fe85P5C10Commercial strips are remelted and are spun into Fe under proper air pressure85P5C10The amorphous strips form developed 3D nanopore-like structures, so that more channels are provided for mass and electron transfer. Thereby increasing the degradation rate.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, and particularly relates to application of a FePC strip in degradation of methylene blue dye wastewater.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Methylene blue belongs to one of chemical dyes, is dark green powder, has alkaline and toxic aqueous solution, is widely applied to aspects such as chemical indicators, dyes, biological coloring agents, medicines and the like, and causes serious environmental pollution when waste water is directly discharged into the environment. At present, the existing degradation method aiming at methylene blue dye wastewater is few, the existing degradation method is high in cost, low in degradation efficiency and short in service life, and the method used in actual industrial production is few.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides an application of a FePC strip in degrading methylene blue dye wastewater. In the application, the Fe is added into the common Fe85P5C10The strip is subjected to melt spinning processing under appropriate air pressure and rotating speed to form an amorphous strip. By the processing method, the obtained amorphous strip has a developed nano-pore structure, and the capability of degrading methylene blue dye wastewater is greatly improved. The application method is simple and efficient, and the application of the FePC amorphous strip in the field of sewage treatment is expanded.
An application of a FePC strip in degrading methylene blue dye wastewater comprises the following steps:
mixing Fe85P5C10Remelting the strips to form an ingot; then controlling the air pressure of a chamber of the vacuum belt throwing machine and the rotating speed of the copper roller, and throwing the belt under the protection of argon; fe to be obtained85P5C10And putting the amorphous strip into the methylene blue dye wastewater to degrade the methylene blue dye wastewater.
In the reaction for degrading methylene blue solution, Fe85P5C10Fe of strip surface0And H2O2React to generate Fe2 +And OH-,Fe2+And H2O2Continuing the reaction to produce Fe3+、OH-And OH, the formed OH can be oxidatively decomposedOrganic matters in the sewage, thereby achieving the effect of degradation. Original Fe85P5C10Commercial strips are remelted and are spun into Fe under proper air pressure85P5C10The amorphous strips form developed nano-pore structures at the same time, and provide more channels for mass and electron transfer. Thereby improving the degradation rate of the wastewater.
In some embodiments, Fe is mixed with85P5C10The strip is put into a resistance furnace for remelting and then cast into a mould for cooling to prepare Fe85P5C10And (5) alloy ingot casting.
In some embodiments, Fe will be obtained85P5C10The alloy cast ingot is used for melt spinning, a cavity of the copper roller melt spinning machine is pumped to proper air pressure, and then argon is filled; putting the cast ingot into a quartz tube, heating and melting the cast ingot in an induction coil, arranging a copper roller at a proper rotating speed, and melting the cast ingot into liquid Fe85P5C10The alloy is sprayed onto a copper roll to obtain Fe85P5C10Amorphous strips.
In some embodiments, the air pressure in the vacuum melt-spun machine chamber is 0.1Pa to 10Pa5Pa. When the air pressure is too high, the ribbon is not easy to form an amorphous structure, and when the air pressure is too low, a developed porous structure is not easy to form.
Further, the air pressure in the vacuum belt-spinning machine cavity is set to be 10 Pa.
In some embodiments, the rotation speed of the copper roller of the vacuum belt throwing machine is set to 4000r/min, when the rotation speed is too low, the strip is not easy to obtain an amorphous structure, and when the rotation speed is too high, the vacuum belt throwing machine is not easy to reach, and the vacuum belt throwing machine is easy to be damaged.
In some embodiments, the temperature at which the methylene blue is degraded is 20-30 ℃.
In some embodiments, agitation is required during degradation.
In some embodiments, the pH of the methylene blue dye is adjusted to 1-4. Due to large amount of H+The Fenton reaction (Fe) is accelerated0+H2O2→Fe2++2OH-，Fe2++H2O2→Fe3++·OH+OH-And OH + organics → products), so when the pH is too high, the reaction does not proceed easily. When the pH value is too low, Fe in the amorphous strip will be dissolved to generate Fe2+And H2(H++Fe0→Fe2++H2↑)，Fe2+Will consume a large amount of OH (Fe)2++·OH→OH-+Fe3+) Thereby reducing the oxidation capability of the ribbon.
Further, the optimal pH value for degrading the methylene blue dye is 2-3.
The invention has the beneficial effects that:
1. the invention adopts simple melt-spun processing, and easily forms the melt-spun strip into an amorphous structure and a developed nano-pore structure under proper air pressure and rotation speed, thereby providing more channels for transferring mass and electrons and further improving the sewage degradation capability of the amorphous strip.
2. The vacuum melt-spun machine controls the chamber of the vacuum melt-spun machine to be at proper air pressure, controls the copper roller of the melt-spun machine to be at proper rotating speed during melt-spun, and has a degradation rate far greater than that of a strip spun under other conditions under specific air pressure and rotating speed.
3. The invention explores the influence of air pressure and rotating speed on producing FePC amorphous strips during processing, greatly improves the degradation rate after processing, and enlarges the application of the FePC amorphous strips in the field of sewage treatment. Compared with other Fe-based amorphous strips, the FePC amorphous strip has lower reaction activation energy and higher reusability. The invention firstly proposes that the strip with better degradation performance is obtained by controlling the air pressure in the vacuum chamber and the rotating speed of the copper roller during processing, so the cost during production is hardly increased, and the operation mode is simpler.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 shows that Fe is obtained when the rotating speed of the vacuum flail machine prepared in example 1 is 4000r/min and the air pressure of a chamber is 10Pa85P5C10XRD pattern of the band.
FIG. 2 shows that Fe is obtained when the rotation speed of the copper roller of the vacuum strip throwing machine prepared in example 1 is 4000r/min and the air pressure of a chamber is 10Pa85P5C10Surface microtopography before and after strip degradation.
In FIG. 3, (a) the rotation speed of the copper roller of the vacuum melt-spun machine is 4000R/min, and the air pressures in the chambers are respectively 0.1Pa (R1), 10Pa (R2) and 10Pa3Pa (R3) and 105Normalized concentration C of the band obtained at Pa (R4) during degradation of the methylene blue solutiont/C0Change, (b) is the degradation rate of the methylene blue solution during degradation, the symbol represents experimental data, and the solid line represents the fitting result.
In figure 4, (a) the air pressure of a chamber of the vacuum melt-spun machine is 10Pa, the rotating speeds of copper rollers are 4000r/min, 3500r/min and 3000r/min respectively to obtain the normalized concentration C of the strip in the process of degrading methylene blue solutiont/C0Variation, where RC represents the original commercial band, (b) is the degradation rate of the methylene blue solution during degradation, the symbols represent experimental data, and the solid line represents the fitting results.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Type of the melting furnace: crucible resistance furnace (SG 2-12-12).
Copper roller melt-spun machine type: semi-automated amorphous metal ribbon fabrication apparatus (SP 009A).
Magnetic stirrer type: the magnetic stirrer (78-1) is heated.
Example 1
4g of purchased Fe85P5C10The commercial strip is placed into a resistance furnace for remelting, then cast into a die with the diameter of 10mm for cooling, and prepared into Fe85P5C10And (5) alloy ingot casting.
Fe to be obtained85P5C10The alloy cast ingot is used for melt spinning, and the chambers of the copper roller melt spinning machine are respectively pumped to 0.1Pa, 10Pa and 10Pa3Pa and 105Pa, then filled with argon. Placing the small ingot in a quartz tube, heating and melting the small ingot in an induction coil, and melting the small ingot into liquid Fe when the rotating speed of a copper roller is 4000r/min85P5C10Spraying the alloy onto a copper roller to obtain strips with different crystal structures, wherein the rotating speed of a vacuum melt-spinning machine is 4000r/min, and Fe is obtained when the air pressure of a chamber is 10Pa85P5C10The XRD pattern of the amorphous band is shown in FIG. 1.
Meanwhile, the Fe obtained after processing is researched under the conditions that the rotating speed of the vacuum melt-spun machine is 4000r/min and the air pressure of a chamber is 10Pa85P5C10The microstructure of the surface of the strip before and after degradation of the methylene blue solution is shown in detail in fig. 2. As can be seen from fig. 1, the obtained strip is an amorphous structure, and this strip is a metastable material, the atoms in the alloy are in a non-equilibrium state, the energy is higher in thermodynamics than that of the corresponding crystalline alloy, the reaction activity is higher, the activation energy required for chemical reaction is lower, and the metastable characteristic of the amorphous alloy endows the amorphous alloy with higher residual stress and unsaturated sites. Meanwhile, as can be seen from fig. 1, the obtained amorphous ribbon has a developed nanopore-like structure, and provides more channels for mass and electron transfer. Therefore, the strip has higher capability of degrading methylene blue dye wastewater.
Respectively taking 5mg of methylene blue powder and a certain amount of concentrated sulfuric acid and hydrogen peroxide solution, and preparing the methylene blue powder and the concentrated sulfuric acid and the hydrogen peroxide solution into a 500mL volumetric flask by using deionized water, wherein the concentration of the methylene blue powder and the concentrated sulfuric acid and the hydrogen peroxide solution are 100mg/L, and the pH value of the volumetric flask is 2, CH2O21mM methylene blue solution.
Pouring the prepared 100ml of methylene blue solution into a 250ml beaker, and adding Fe85P5C10The strips were cut to 1cm length and 30mg were weighed into a beaker containing methylene blue solution, temperature controlled at 25 ℃ with magnetic stirring.
3mL of methylene blue solution is extracted from a beaker by a disposable needle tube at regular intervals and is stored in a 5mL glass bottle, and the color is detected by an ultraviolet-visible spectrophotometer, so that the concentration change of the methylene blue solution is judged.
In example 1, methylene blue solution is normalized for concentration C during degradationt/C0The graph comparing the change rate and the degradation rate is shown in fig. 3, and it can be known that the degradation rate of the amorphous strip obtained when the air pressure of the chamber of the copper roller strip throwing machine is 10Pa is the highest for the methylene blue solution.
Example 2
4g of purchased Fe85P5C10The commercial strip is placed into a resistance furnace for remelting, then cast into a die with the diameter of 10mm for cooling, and prepared into Fe85P5C10And (5) alloy ingot casting.
Fe to be obtained85P5C10And (3) using the alloy cast ingot for melt spinning, pumping a chamber of the copper roller melt spinning machine to 10Pa, and then filling argon. Placing the small ingot in a quartz tube, heating and melting the small ingot in an induction coil, and melting the small ingot into liquid Fe when the rotating speed of a copper roller is 3000r/min, 3500r/min and 4000r/min respectively85P5C10The alloy was sprayed onto a copper roll to obtain strips of different crystal structures.
Respectively taking 5mg of methylene blue powder and a certain amount of concentrated sulfuric acid and hydrogen peroxide solution, and preparing the methylene blue powder and the concentrated sulfuric acid and the hydrogen peroxide solution into a 500mL volumetric flask by using deionized water, wherein the concentration of the methylene blue powder and the concentrated sulfuric acid and the hydrogen peroxide solution are 100mg/L, and the pH value of the volumetric flask is 2, CH2O21mM methylene blue solution.
Pouring the prepared 100ml of methylene blue solution into a 250ml beaker, and adding Fe85P5C10The strips were cut to 1cm length and 30mg were weighed into a beaker containing methylene blue solution, temperature controlled at 25 ℃ with magnetic stirring.
3mL of methylene blue solution is extracted from a beaker by a disposable needle tube at regular intervals and is stored in a 5mL glass bottle, and the color is detected by an ultraviolet-visible spectrophotometer, so that the concentration change of the methylene blue solution is judged.
In example 2, methylene blue solution is normalized for concentration C during degradationt/C0The graph comparing the change rate and the degradation rate is shown in fig. 4, and it can be known that the degradation rate of the amorphous strip to the methylene blue solution is the maximum when the rotation speed of the copper roller melt-spun machine is 4000 r/min.
Example 3
4g of purchased Fe85P5C10The commercial strip is placed into a resistance furnace for remelting, then cast into a die with the diameter of 10mm for cooling, and prepared into Fe85P5C10And (5) alloy ingot casting.
Fe to be obtained85P5C10And (3) using the alloy cast ingot for melt spinning, pumping a chamber of the copper roller melt spinning machine to 10Pa, and then filling argon. Placing the small ingot in a quartz tube, heating and melting the small ingot in an induction coil, and melting the small ingot into liquid Fe when the rotating speed of a copper roller is 4000r/min85P5C10The alloy was sprayed onto a copper roller to obtain a ribbon of amorphous structure.
Respectively taking 5mg of methylene blue powder and a certain amount of concentrated sulfuric acid and hydrogen peroxide solution, and preparing five groups of solutions with the concentration of 100mg/L and C in a 500mL volumetric flask by using deionized waterH2O2Methylene blue solution at pH 1, 2, 3 and 4, respectively, at 1 mM.
Pouring the prepared 100ml of methylene blue solution into a 250ml beaker, and adding Fe85P5C10Cutting the strip into 1cm long, weighing 30mg, adding into a beaker containing methylene blue solution, and controlling temperature at 25%DEG C with magnetic stirring.
3mL of methylene blue solution is extracted from a beaker by a disposable needle tube at regular intervals and is stored in a 5mL glass bottle, and the color is detected by an ultraviolet-visible spectrophotometer, so that the concentration change of the methylene blue solution is judged.
In example 3, the rate of degradation of the solution by the band is highest when the pH of the methylene blue solution is 2 or 3.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An application of a FePC strip in degrading methylene blue dye wastewater is characterized in that: the method comprises the following steps:
mixing Fe85P5C10Remelting the strips to form an ingot; then controlling the air pressure of a chamber of the vacuum belt throwing machine and the rotating speed of the copper roller, and throwing the belt under the protection of argon; fe to be obtained85P5C10And putting the amorphous strip into the methylene blue dye wastewater to degrade the methylene blue dye wastewater.
2. Use according to claim 1, wherein the Fe is added85P5C10The specific method for forming the ingot by remelting the strips comprises the following steps: mixing Fe85P5C10The strips are placed in a resistance furnace for remelting and then cast into a mould for cooling to prepare a cast ingot.
3. The use according to claim 1, characterized in that the ingot obtained is used for melt spinning, the chamber of a copper roller melt spinning machine is pumped to a suitable gas pressure and then filled with argon; placing the cast ingot in an induction coil of a quartz tube, heating and melting the cast ingot, arranging a copper roller at a proper rotating speed, and melting the cast ingot into liquidBulk Fe85P5C10The alloy is sprayed onto a copper roll to obtain Fe85P5C10Amorphous strips.
4. Use according to claim 3, wherein the pressure in the chamber of the vacuum melt-spinning machine is between 0.1Pa and 10Pa5Pa。
5. Use according to claim 3, wherein the air pressure in the chamber of the vacuum melt-spun machine is 10 Pa.
6. Use according to claim 3, characterized in that the rotation speed of the copper rolls of the vacuum belt slinger is set to 4000 r/min.
7. Use according to claim 1, wherein the temperature of degradation is 20-30 ℃.
8. Use according to claim 1, characterized in that during degradation stirring is required.
9. The use according to claim 1, wherein the pH of the methylene blue dye wastewater is adjusted to 1-4.
10. The use according to claim 1, wherein the pH of the methylene blue dye wastewater is adjusted to 2 to 3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115041204A (en) * | 2022-06-13 | 2022-09-13 | 山东大学 | Method for improving catalytic degradation activity of red 195 dye in FePC amorphous alloy and application |
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