CN107297200B - Foamed copper ferrite with organic polyurethane foam as substrate and preparation and application thereof - Google Patents
Foamed copper ferrite with organic polyurethane foam as substrate and preparation and application thereof Download PDFInfo
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- CN107297200B CN107297200B CN201710637482.5A CN201710637482A CN107297200B CN 107297200 B CN107297200 B CN 107297200B CN 201710637482 A CN201710637482 A CN 201710637482A CN 107297200 B CN107297200 B CN 107297200B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
- B01J20/0229—Compounds of Fe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0233—Compounds of Cu, Ag, Au
- B01J20/0237—Compounds of Cu
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28042—Shaped bodies; Monolithic structures
- B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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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
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The invention discloses a foamed copper ferrite taking organic polyurethane foam as a substrate, and preparation and application thereof. The foamed copper ferrite is formed by growing copper ferrite on the surface of organic polyurethane foam. The invention provides application of the copper ferrite in adsorption removal of arsenic in a water body, and the copper ferrite not only has very strong adsorption capacity on arsenic in the water body, particularly arsenic (V), but also has better recycling performance because a substrate of the copper ferrite can be easily recovered.
Description
(I) technical field
The invention relates to a foamed copper ferrite taking organic polyurethane foam as a substrate, a preparation method thereof and application of the foamed copper ferrite in adsorption removal of arsenic in a water body.
(II) background of the invention
Arsenic is semi-metallic and often used as an alloying additive to improve alloying properties, for example, adding small amounts of arsenic to copper to make arsenic copper alloys can significantly reduce the thermal and electrical conductivity of copper. In addition, arsenic is also often used as a dopant material for the preparation of some semiconductor materials. Natural arsenic or metallic compounds of arsenic are very rare in nature and are mostly incorporated as sulfides in other metal ores such as copper, lead, zinc and cobalt ores. With the mining and smelting of arsenic-containing minerals by human beings and the wide utilization of arsenide, the migration and conversion process of arsenic in the environment are directly or indirectly influenced. On the other hand, arsenic and compounds thereof are recognized carcinogens by various authorities in the world, and excessive intake of arsenic can cause great harm to human bodies. After arsenic is absorbed by human body, trivalent arsenic can interfere the reaction of phosphorus in human body, such as blocking the synthesis of adenosine triphosphate, etc., arsenic can also react with sulfhydryl of enzyme protein in the body, so that enzyme loses activity, normal metabolism of cells is affected, tissue damage and body disorder are caused, and poisoning and even death are directly caused. Chronic drinking arsenic poisoning can cause damage to multiple system functions of the human body, resulting in diseases such as hypertension, cardiovascular and cerebrovascular diseases, diabetes, skin pigment metabolism disorder and the like, and finally developing into skin cancer. In recent years, along with the acceleration of the industrialization process, arsenic pollution caused by industrial production is continuously expanded, and the toxicity of arsenic in water bodies is reported at home and abroad.
The world health organization and other international research institutions agree that arsenic is a highly toxic element and is one of the pollutants preferentially controlled in water. Arsenic in different forms is also toxic, inorganic arsenic is generally more toxic than organic arsenic, trivalent arsenic is more toxic than pentavalent arsenic, and compounds of arsenic have far greater toxicity of hydrogen arsenide than other arsenates and arsenites. In the world, various diseases such as cancer and even death frequently occur due to acute or chronic arsenic poisoning caused by arsenic pollution of drinking water, and the amazing data of the diseases cause high attention to arsenic in drinking water. In 1993, the limit of the arsenic content in a new drinking water standard established by the world health organization is 10 mug/L, and countries around the world adopt the standard one by one, so that the maximum allowable arsenic content standard in the drinking water is improved from 50 mug/L to 10 mug/L.
At present, the common methods for removing arsenic from water bodies include a coagulation method, an ion exchange method, an adsorption method, an oxidation precipitation method, a biological method and the like. The adsorption method is the first choice method for removing arsenic from drinking water, common adsorbents comprise activated alumina, titanium oxide, zeolite, iron-manganese compounds and the like, the method is simple and convenient to operate, the price of the adsorbent is low, and the method is suitable for treating arsenic pollution of water bodies of factories. However, the powder adsorbent is difficult to recover and reuse, and even the powder can cause secondary pollution to water bodies, so the powder adsorbent is not suitable for arsenic pollution treatment of large-area water bodies such as lakes, rivers and the like.
Therefore, the research on the high-efficiency recyclable adsorbent has very important significance for treating the arsenic pollution of the water body.
Disclosure of the invention
The invention aims to provide a copper ferrite foam with organic foam as a substrate, a preparation method thereof and application thereof in adsorption removal of arsenic in a water body aiming at the defect of treatment of arsenic pollution in the water body in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a foamed copper ferrite taking organic polyurethane foam as a substrate, which is prepared by growing copper ferrite on the surface of the organic polyurethane foam through the following method:
(1) taking a polyurethane foam substrate, and soaking the polyurethane foam substrate in NaOH solution to remove oil stains on the surface; polyurethane foam substrate after degreasing in SnCl-containing atmosphere2Sensitizing in a hydrochloric acid solution, taking out, washing with water and drying; then the sensitized polyurethane foam substrate is placed in a liquid containing PdCl2Activating in the ethanol aqueous solution, taking out, washing with water and drying;
(2) weighing ferric nitrate and copper nitrate with the molar ratio of copper to iron being 1: 1-1: 5, adding the ferric nitrate and the copper nitrate into distilled water, stirring to dissolve, adding urea, wherein the molar ratio of nitrate to urea is 26:1-5:1, continuously stirring for 10-60 min, then putting the mixture and the polyurethane foam substrate treated in the step (1) into a reaction kettle, sealing completely, transferring the reaction kettle into an oven to perform heat preservation reaction, wherein the reaction temperature is 50-200 ℃, and the heat preservation time is 3-12 h;
(3) and after the reaction is finished, taking out the polyurethane foam with the copper ferrite growing on the surface, repeatedly washing the polyurethane foam with distilled water, and drying the polyurethane foam in a drying oven at the temperature of 50-100 ℃ to obtain the foamed copper ferrite.
In the invention, the foamed copper ferrite is in a black porous block foam shape after being washed and dried, and the main component of the surface of the foamed copper ferrite is CuFe2O4。
Further, in the step (1), the concentration of the sodium hydroxide solution is preferably 1-3M. The soaking time is preferably 2-10 min.
Further, in the step (1), the pore size of the polyurethane foam substrate is 30ppi to 120 ppi.
Further, in the step (1), SnCl is contained2In hydrochloric acid solution, SnCl2The concentration of (A) is 5-15g/L, and the mass concentration of hydrochloric acid is 0.5-3%. The time for the sensitization treatment is preferably 1 to 10 min.
Further, in the step (1), PdCl is contained2In aqueous ethanol of (1), PdCl2The concentration of (A) is 0.2-0.8g/L, and the volume ratio of ethanol to water is preferably 1: 1. The activation time is preferably 1-10 min.
The invention provides a preparation method of foamed copper ferrite with organic polyurethane foam as a substrate, which comprises the following steps:
(1) taking a polyurethane foam substrate, and soaking the polyurethane foam substrate in NaOH solution to remove oil stains on the surface; polyurethane foam substrate after degreasing in SnCl-containing atmosphere2Sensitizing in a hydrochloric acid solution, taking out, washing with water and drying; then the sensitized polyurethane foam substrate is placed in a liquid containing PdCl2Activating in the ethanol aqueous solution, taking out, washing with water and drying;
(2) weighing ferric nitrate and copper nitrate with the molar ratio of copper to iron being 1: 1-1: 5, adding the ferric nitrate and the copper nitrate into distilled water, stirring to dissolve, adding urea, wherein the molar ratio of nitrate to urea is 26:1-5:1, continuously stirring for 10-60 min, then putting the mixture and the polyurethane foam substrate treated in the step (1) into a reaction kettle, sealing completely, transferring the reaction kettle into an oven to perform heat preservation reaction, wherein the reaction temperature is 50-200 ℃, and the heat preservation time is 3-12 h;
(3) and after the reaction is finished, taking out the polyurethane foam with the copper ferrite growing on the surface, repeatedly washing the polyurethane foam with distilled water, and drying the polyurethane foam in a drying oven at the temperature of 50-100 ℃ to obtain the foamed copper ferrite.
The details of the above preparation method are the same as above, and are not repeated herein.
The invention also provides an application of the copper ferrite foam in adsorption removal of arsenic in a water body, and the application specifically comprises the following steps:
(a) adjusting the pH value of the arsenic-containing wastewater to 2-12, adding foamed copper ferrite, and oscillating and adsorbing at the temperature of 10-60 ℃ at the speed of 100-400 r/min;
(b) after oscillation adsorption, the foamed copper ferrite is sucked out by a magnet, and the wastewater is filtered to obtain the treated water body. The adsorbed copper ferrite foam can be washed and desorbed by NaOH solution with a certain concentration, and can be reused.
Further, the arsenic is preferably as (v).
Further, the content of As (V) in the arsenic-containing wastewater is 1-100 mg/L.
The water body (namely the arsenic-containing wastewater) is industrial heavy metal metallurgical wastewater, surface water or domestic sewage.
The invention has the beneficial effects that:
(1) compared with the nano CuFe reported in the existing literature, the copper ferrite foam of the invention2O4And higher adsorption capacity for As (V).
(2) The preparation process of the foamed copper ferrite is simple, convenient to operate, high in efficiency, easy to implement, free of secondary pollution, economical and environment-friendly, realizes resource renewable utilization, and the prepared foamed copper ferrite
(3) The invention adopts the method of removing arsenic by the copper ferrite foam adsorption, the adsorbent can easily separate the arsenic from the water body by using the magnet while efficiently removing the arsenic in the water body, and secondary pollution is not generated, thereby successfully solving the aeipathia that the adsorbent is difficult to recycle and reuse and easily causes secondary pollution in the existing treatment process of arsenic pollution in the water body.
(IV) detailed description of the preferred embodiments
The present invention is further illustrated by the following specific examples, but the scope of the present invention is not limited thereto.
Example 1
Taking a polyurethane foam substrate with the pore size of 30ppi and the size of 3cm × 3cm × 0.5cm and 0.5cm, and putting the polyurethane foam substrate into a 1M NaOH solutionSoaking for 2min to remove oil stain on the surface; polyurethane foam after oil removal containing 10g/L SnCl2Sensitizing for 5min in 1.4% hydrochloric acid solution, taking out, washing with water and drying; the sensitized polyurethane foam was then placed in a bath containing 0.5g/LPdCl2Activating in ethanol water solution (volume ratio of ethanol to water is 1:1) for 3min, taking out, washing with water, and blow-drying.
Weighing 16.1g of ferric nitrate nonahydrate and 9.6g of cupric nitrate trihydrate, wherein the molar ratio of copper to iron is 1:1, pouring the weighed materials into a beaker containing 100mL of distilled water, stirring the materials to be completely dissolved, adding 0.6g of urea, and continuing stirring the materials for 10 min; after the reaction is completed, putting the obtained product and the treated polyurethane foam substrate into a reaction kettle, sealing the reaction kettle completely, and transferring the reaction kettle into an oven for heat preservation, wherein the reaction temperature is 50 ℃, and the heat preservation time is 3 hours; and after the reaction is finished, taking out the foamed iron with the copper ferrite growing on the surface, repeatedly washing the foamed iron with distilled water, and drying the foamed iron in a drying oven at 50 ℃ to obtain the foamed copper ferrite.
50mL of arsenic-containing raw solution with 10mg/L of As (V) content is put into a 250mL conical flask, the pH value of the solution is adjusted to 3 by hydrochloric acid, a piece of prepared copper ferrite foam is added, the mixture is transferred to a constant-temperature water bath oscillator, the stirring speed is 200r/min, the reaction temperature is 50 ℃, and the adsorption time is 5-180 min.
And evaluating the adsorption removal effect of the copper ferrate foam on arsenic in the water body by adopting the adsorption rate.
TABLE 1 results of experiments with different adsorption times
Example 2
Soaking polyurethane foam substrate with aperture of 30ppi and size of 3cm × 3cm × 0.5.5 cm in 3M NaOH solution for 10min to remove oil stain on surface, and removing oil in the polyurethane foam substrate containing 10g/L SnCl2Sensitizing for 5min in 1.4% hydrochloric acid solution, taking out, washing with water and drying; then will be sensitizedThe polyurethane foam thus treated contained 0.5g/LPdCl2Activating in ethanol water solution (volume ratio of ethanol to water is 1:1) for 3min, taking out, washing with water, and blow-drying.
Weighing 16.1g of ferric nitrate nonahydrate and 48.0g of cupric nitrate trihydrate, wherein the molar ratio of copper to iron is 1:5, pouring the weighed materials into a beaker containing 100mL of distilled water, stirring the materials to be completely dissolved, adding 6g of urea, and continuously stirring the materials for 60 min; after the reaction is completed, putting the obtained product and the treated polyurethane foam substrate into a reaction kettle, sealing the reaction kettle completely, and transferring the reaction kettle into an oven for heat preservation, wherein the reaction temperature is 200 ℃, and the heat preservation time is 12 hours; and after the reaction is finished, taking out the polyurethane foam substrate with the copper ferrite growing on the surface, repeatedly washing the polyurethane foam substrate with distilled water, and drying the polyurethane foam substrate in a drying oven at the temperature of 100 ℃ to obtain the foamed copper ferrite.
50mL of arsenic-containing raw solution with 10mg/L of As (V) content is put into a 250mL conical flask, the pH value of the solution is adjusted to 3 by hydrochloric acid, a piece of prepared copper ferrite foam is added, the mixture is transferred to a constant-temperature water bath oscillator, the stirring speed is 200r/min, the reaction temperature is 50 ℃, and the adsorption time is 5-180 min.
And evaluating the adsorption removal effect of the copper ferrate foam on arsenic in the water body by adopting the adsorption rate.
TABLE 2 results of experiments with different adsorption times
Example 3
The preparation method of the copper ferrite foam is the same as that of example 1.
50mL of arsenic-containing raw solution with 10mg/L of As (V) content is put into a 250mL conical flask, the pH value of the solution is adjusted to 3 by hydrochloric acid, a piece of prepared copper ferrite foam is added, the mixture is transferred to a constant-temperature water bath oscillator, the stirring speed is 200r/min, the reaction temperature is 15-60 ℃, and the adsorption time is 180 min.
And evaluating the adsorption removal effect of the copper ferrate foam on arsenic in the water body by adopting the adsorption rate.
TABLE 3 results of experiments with different adsorption temperatures
| Temperature/. degree.C | Adsorption rate of arsenic/%) |
| 15 | 52.6 |
| 20 | 60.1 |
| 30 | 64.4 |
| 40 | 95.2 |
| 50 | 98.9 |
| 60 | 99.3 |
Example 4
The preparation method of the copper ferrite foam is the same as that of example 1.
50mL of arsenic-containing raw solution with 10mg/L of As (V) content is put into a 250mL conical flask, the pH value is adjusted to 2-12 by hydrochloric acid, a piece of prepared foamy copper ferrite with the aperture size of 30ppi is added, the foamy copper ferrite is transferred to a constant-temperature water bath oscillator, the stirring speed is 200r/min, the reaction temperature is 50 ℃, and the adsorption time is 180 min.
And evaluating the replacement and removal effect of the copper ferrite foam on arsenic in the water body by adopting the adsorption rate.
TABLE 4 adsorption test results at different pH
Example 5
The preparation method of the copper ferrite foam is the same as that of example 1.
50mL of arsenic-containing raw solution is put into a 250mL conical flask, pH of each conical flask is adjusted to 3 by hydrochloric acid, a piece of prepared foamy copper ferrite with the aperture size of 30ppi is added, the foamy copper ferrite is transferred to a constant-temperature water bath oscillator, the stirring speed is 200r/min, the reaction temperature is 50 ℃, and the adsorption time is 180 min.
And evaluating the replacement and removal effect of the copper ferrite foam on arsenic in the water body by adopting the adsorption rate.
TABLE 5 adsorption experiment results for different arsenic concentrations
| As (V) concentration/mgL-1 | Adsorption rate/%) |
| 10 | 98.9 |
| 20 | 49.5 |
| 40 | 25.9 |
| 60 | 24.7 |
| 80 | 16.1 |
| 100 | 14.3 |
Example 6
The preparation method of the foamed copper ferrite is the same as that of the example 1, and the foamed copper ferrite with different pore sizes can be obtained only by changing the pore size of the polyurethane foam substrate.
50mL of arsenic-containing raw solution with 10mg/L of As (V) content is put into a 250mL conical flask, hydrochloric acid is used for adjusting the pH value to 3, then a piece of copper ferrite foam with different pore sizes of 3cm × 3cm × 0.5cm and 0.5cm is respectively added, the mixture is transferred to a constant-temperature water bath oscillator, the stirring speed is 200r/min, the reaction temperature is 50 ℃, and the adsorption time is 180 min.
And evaluating the replacement and removal effect of the copper ferrite foam on arsenic in the water body by adopting the adsorption rate.
TABLE 6 adsorption experiment results for different pore sizes
Example 7
The preparation method of the copper ferrite foam is the same as that of example 1.
Preparing an arsenic (V) -containing raw solution with initial concentration of 5, 10, 20, 40, 60, 80 and 100mg/L, adjusting pH to 7, respectively putting 50mL of the arsenic-containing raw solution into 7 250mL conical flasks, respectively adding an adsorbing material with the same mass, transferring to a constant-temperature water bath oscillator, stirring at 200r/min, reacting at 50 ℃ and for 180 min. Comparing the results of the 7 flasks, it was found that the arsenic (V) adsorbed by the adsorbent of a certain mass had a saturation value, and that the adsorption amount did not increase beyond the certain value, which is the saturation adsorption amount, and the saturation adsorption amount per unit mass is the adsorption capacity of the adsorbent. Table 7 compares the saturation capacity of three adsorbents:
TABLE 7 comparison of adsorption capacities
[a]:Y.-J.Tu,C.-F.You,C.-K.Chang,S.-L.Wang,T.-S.Chan,Adsorptionbehavior of As(III)onto a copper ferrite generated from printed circuit boardindustry,ChemEng J, 225(2013)433-439。
Claims (10)
1. A foamed copper ferrite based on organic polyurethane foam is prepared by growing copper ferrite on the surface of organic polyurethane foam through the following steps:
(1) taking a polyurethane foam substrate, and soaking the polyurethane foam substrate in NaOH solution to remove oil stains on the surface; polyurethane foam substrate after degreasing in SnCl-containing atmosphere2Sensitizing in a hydrochloric acid solution, taking out, washing with water and drying; then the sensitized polyurethane foam substrate is placed in a liquid containing PdCl2Activating in the ethanol aqueous solution, taking out, washing with water and drying;
(2) weighing ferric nitrate and copper nitrate with the molar ratio of copper to iron being 1: 1-1: 5, adding the ferric nitrate and the copper nitrate into distilled water, stirring to dissolve, adding urea, wherein the molar ratio of nitrate to urea is 26:1-5:1, continuously stirring for 10-60 min, then putting the mixture and the polyurethane foam substrate treated in the step (1) into a reaction kettle, sealing completely, transferring the reaction kettle into an oven to perform heat preservation reaction, wherein the reaction temperature is 50-200 ℃, and the heat preservation time is 3-12 h;
(3) and after the reaction is finished, taking out the polyurethane foam with the copper ferrite growing on the surface, repeatedly washing the polyurethane foam with distilled water, and drying the polyurethane foam in a drying oven at the temperature of 50-100 ℃ to obtain the foamed copper ferrite.
2. The foamed copper ferrite based on organic polyurethane foam according to claim 1, wherein: in the step (1), the concentration of the sodium hydroxide solution is 1-3M, and the soaking time is 2-10 min.
3. The foamed copper ferrite based on organic polyurethane foam according to claim 1, wherein: in step (1), the pore size of the polyurethane foam substrate is 30ppi to 120 ppi.
4. The foamed copper ferrite based on organic polyurethane foam according to claim 1, wherein: in the step (1), SnCl is contained2In hydrochloric acid solution, SnCl2The concentration of the hydrochloric acid is 5-15g/L, and the mass concentration of the hydrochloric acid is 0.5-3%; the sensitization treatment time is 1-10 min.
5. The foamed copper ferrite based on organic polyurethane foam according to claim 1, wherein: in the step (1), containing PdCl2In aqueous ethanol of (1), PdCl2The concentration of the ethanol is 0.2-0.8g/L, and the volume ratio of the ethanol to the water is 1: 1; the activation time is 1-10 min.
6. A method for preparing foamed copper ferrite based on organic polyurethane foam according to claim 1, which comprises the following steps:
(1) taking a polyurethane foam substrate, and soaking the polyurethane foam substrate in NaOH solution to remove oil stains on the surface; polyurethane foam substrate after degreasing in SnCl-containing atmosphere2Sensitizing in a hydrochloric acid solution, taking out, washing with water and drying; then the sensitized polyurethane foam substrate is placed in a liquid containing PdCl2Activating in the ethanol aqueous solution, taking out, washing with water and drying;
(2) weighing ferric nitrate and copper nitrate with the molar ratio of copper to iron being 1: 1-1: 5, adding the ferric nitrate and the copper nitrate into distilled water, stirring to dissolve, adding urea, wherein the molar ratio of nitrate to urea is 26:1-5:1, continuously stirring for 10-60 min, then putting the mixture and the polyurethane foam substrate treated in the step (1) into a reaction kettle, sealing completely, transferring the reaction kettle into an oven to perform heat preservation reaction, wherein the reaction temperature is 50-200 ℃, and the heat preservation time is 3-12 h;
(3) and after the reaction is finished, taking out the polyurethane foam with the copper ferrite growing on the surface, repeatedly washing the polyurethane foam with distilled water, and drying the polyurethane foam in a drying oven at the temperature of 50-100 ℃ to obtain the foamed copper ferrite.
7. The method of claim 6, wherein: in step (1), the pore size of the polyurethane foam substrate is 30ppi to 120 ppi.
8. The application of the foamed copper ferrite taking the organic polyurethane foam as the substrate in the adsorption removal of arsenic in a water body according to claim 1, which is specifically as follows:
(a) adjusting the pH value of the arsenic-containing wastewater to 2-12, adding foamed copper ferrite, and oscillating and adsorbing at the temperature of 10-60 ℃ at the speed of 100-400 r/min;
(b) after oscillation adsorption, the foamed copper ferrite is sucked out by a magnet, and the wastewater is filtered to obtain the treated water body.
9. The use of claim 8, wherein: the arsenic is As (V).
10. The use of claim 9, wherein: the As (V) content in the arsenic-containing wastewater is 1-100 mg/L.
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| CN113828281B (en) * | 2021-09-18 | 2023-07-14 | 集美大学 | Preparation method, product and application of polyurethane composite material |
| CN114632499B (en) * | 2022-03-18 | 2023-01-03 | 中南大学 | Integrated molding material for emergency treatment of mercury-polluted water body and preparation method and application thereof |
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