CN113044911A - Method for preparing ZIFs/loofah sponge composite material by using wastewater - Google Patents

Method for preparing ZIFs/loofah sponge composite material by using wastewater Download PDF

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CN113044911A
CN113044911A CN201911365792.1A CN201911365792A CN113044911A CN 113044911 A CN113044911 A CN 113044911A CN 201911365792 A CN201911365792 A CN 201911365792A CN 113044911 A CN113044911 A CN 113044911A
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loofah
zifs
loofah sponge
wastewater
preparation
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邓秋林
黄晓枫
雷琴
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Southwest University of Science and Technology
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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
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • 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
    • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/1691—Coordination polymers, e.g. metal-organic frameworks [MOF]
    • 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
    • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/18—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
    • B01J31/1805—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
    • B01J31/181—Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine
    • B01J31/1815—Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine
    • B01J35/39—
    • 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
    • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/20—Complexes comprising metals of Group II (IIA or IIB) as the central metal
    • B01J2531/26—Zinc
    • 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
    • C02F2101/34—Organic compounds containing oxygen
    • 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
    • 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
    • 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
    • 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
    • C02F2305/10—Photocatalysts

Abstract

The invention provides a method for preparing ZIFs by using zinc-containing wastewater, loading the ZIFs on loofah sponge and deeply treating organic wastewater. The preparation method comprises the following steps: firstly, transferring activated loofah sponge into a 2-methylimidazole solution for ultrasonic dispersion; then, dropwise adding the wastewater solution under stirring; and finally, taking out the loofah sponge, washing and drying to obtain the ZIFs/loofah sponge composite material. The invention takes zinc-containing wastewater as a raw material, prepares ZIFs for photocatalytic degradation of organic wastewater, and realizes the purpose of treating wastes with processes of wastes against one another. Meanwhile, the renewable and low-pollution loofah sponge is used as a carrier of the metal organic framework, so that the rapid separation and the recycling of the catalyst are realized, and the secondary pollution is avoided. The invention prepares an efficient environment-friendly photocatalyst and provides a preparation method which is low in cost, environment-friendly, simple, convenient and easy to operate.

Description

Method for preparing ZIFs/loofah sponge composite material by using wastewater
Technical Field
The invention belongs to the technical field of composite materials and wastewater treatment, and particularly relates to a preparation method and application of a composite material.
Background
As industrialization progresses faster, environmental issues become increasingly urgent. Among them, the treatment of industrial wastewater remains one of the major environmental problems facing the world (z. Shi et al,Environ. Sci. Technol. 47 (2013) 3761-3767.). Generally, the wastewater includes metallurgical wastewater, paper-making wastewater, coke-oven gas wastewater, dye wastewater, and the like. ByThe industrial wastewater as a pollutant in the wastewater has various types, complex components and quite complex treatment process. Therefore, the comprehensive utilization of the industrial wastewater is further developed, and the harm is turned into the benefit, which has very important significance.
Electroplating, as a common industrial technique, plays an irreplaceable role in many industries. But also accompanied by a large amount of electroplating wastewater. The waste water contains a large amount of heavy metal ions, organic compounds, inorganic compounds and other harmful substances, and has great influence on human health and environment through the action of a food chain. Although some methods have been used in the treatment of electroplating wastewater, such as chemical precipitation, redox, evaporative concentration, adsorption, etc. (s.s. Hosseini et al,J. Water Process Eng.9 (2016) 78-110). However, the treated heavy metals are often difficult to recycle. Therefore, the secondary utilization of heavy metal ions in the wastewater by a simple method is urgently needed.
As a new porous material, Metal Organic Frameworks (MOFs) have become one of the research hotspots in the field of material science with the advantages of high specific surface area, controllable porous structure, good framework structure, etc., and have many potential application prospects (Xiong et al,Sci. Total Environ. 627 (2018) 235-244.). Among them, ZIF-8 has become the most widely studied catalytic MOFs material due to its high thermal and chemical stability in aqueous solutions (Moghaddam et al,Microchemical J.150 (2019) 104-185.). Some studies have used ZIF-8 as a photocatalyst in the field of wastewater treatment (Wang et al,Chem. Eng. J.328 (2017) 927-942). However, ZIF-8 materials are typically available in finely divided powder form, which severely limits their use in wastewater treatment. Therefore, the practical application of the ZIF-8 can be realized to a greater extent.
Loofah, a low-cost, renewable and degradable fibrous reticulated biomass material, has received widespread attention (Xiao et al,Bioresource Technology. 118 (2012) 619-623). The support column of the natural biomass material has a microcellular structure, and the cylindrical fruit thereof hasWith a three-dimensional tube bundle system in mesh and a continuous hollow structure (Gupta et al,Carbohydrate polymers. 98 (2013) 1214-1221.). Because of its high mechanical strength, good stability, rich functional groups and other advantages, some work has used modified loofah as a catalyst carrier to play an important role in wastewater treatment (Yang et al,J. Clean. Prod. 200(2018)945-953.)。
therefore, the ZIFs/loofah sponge composite material prepared by electroplating the zinc-containing wastewater and loofah sponge is used for degrading organic matters in the wastewater. Zinc ions in electroplating wastewater are used as a zinc source of the ZIF-8 to synthesize the heterogeneous metal organic framework material containing the photocatalyst ZIF-8. Meanwhile, the loofah sponge is used as a catalyst carrier, so that the catalyst can be simply and conveniently separated from water, and the rapid separation and the recycling of the catalyst are realized. The invention prepares an efficient environment-friendly photocatalyst, provides a simple and easy-to-operate preparation method, and achieves the purpose of treating wastes with processes of wastes against one another.
Disclosure of Invention
The invention aims to provide a method for preparing a metal organic framework/loofah sponge composite material by synthesizing a metal organic framework loaded on loofah sponge by using zinc-containing wastewater. The preparation method provided by the invention has the advantages of simple process, low consumption, environmental protection and capability of effectively removing and reutilizing the metal ions in the wastewater. The composite material prepared by the invention is combined by the action of hydrogen bonds, the prepared metal organic framework is used as a photocatalyst, and the loofah sponge well plays a role of supporting a carrier, so that the metal organic framework can be well separated from water, secondary pollution is avoided, and the metal organic framework can be recycled for many times. The prepared composite material has the advantages of high catalytic performance and easy separation, and realizes the development and utilization of heavy metal wastewater in an environment-friendly and efficient manner.
A preparation method for synthesizing a metal organic framework/loofah sponge composite material by using wastewater mainly comprises the following steps:
(1) transferring the 2-methylimidazole into a beaker, adding water, and stirring until the 2-methylimidazole is completely dissolved to obtain a 2-methylimidazole solution with the mass fraction of 5-20%;
(2) will aliveUltrasonically dispersing retinervus Luffae fructus in water for 10-30 min, transferring into 2-methylimidazole solution, ultrasonically dispersing for 5-20 min, and further ultrasonic dispersing at 25-85%oC, continuously stirring for 2-5 h;
(3) dropwise adding the zinc-containing waste liquid into the mixed liquid obtained in the step (2), continuously stirring for 1-4 h, taking out the loofah sponge, cleaning with distilled water, and purifying by 50oAnd C, drying.
Further, the activation process of the loofah sponge comprises the following steps:
(11) cleaning retinervus Luffae fructus, soaking in water for 8-16 hr, 45%oC, drying;
(12) transferring the loofah sponge treated in the step (11) into an activating agent, performing ultrasonic dispersion for 10-50 min, and then performing ultrasonic dispersion at 45 DEGoStirring for 2-6 h under C;
(13) washing the loofah sponge obtained in the step (12) to be neutral, and then washing 45oAnd C, drying to obtain the activated loofah sponge.
Furthermore, the zinc-containing waste liquid contains 10.0-20.0 g/L, Cr 3.0.0-7.0 g/L, Co 1.0.0-2.0 g/L, Fe 0.01.01-0.10 g/L, W0-0.50 g/L of Zn.
Further, the activating agent is NaOH or H5IO6Or Na5IO6At least one of the solutions.
Further, the mass fraction of the activating agent is 1-5%.
Further, the mass fraction of the 2-methylimidazole is 5-20%.
Further, in the step (2), the mass ratio of the activated loofah sponge to the 2-methylimidazole is 1: (10-30).
Further, in the step (3), the mass ratio of the 2-methylimidazole to the waste liquid is 1: (0.5-2).
Drawings
FIG. 1 is an XRD pattern of ZIF-8 (as-ZIF-8), standard ZIF-8, metal organic framework (ZIF-ALL), retinervus Luffae fructus (LC) and metal organic framework/retinervus Luffae fructus composite (ZIF/LC) prepared by the present invention.
FIG. 2 is an infrared spectrum of the metal organic framed/loofah sponge composite material (ZIF/LC), ZIF-8 and loofah sponge (LC) prepared by the present invention.
FIG. 3 is a UV diffuse reflectance spectrum of a ZIF/LC composite and ZIF-8 prepared in accordance with the present invention.
FIG. 4 is a fluorescence spectrum of ZIF/LC composite and ZIF-8 prepared by the present invention.
FIG. 5 shows the photodegradation effects of the ZIF/LC composite material prepared by the present invention on Methylene Blue (MB), rhodamine B (RhB) and Congo Red (CR).
FIG. 6 is a graph showing the CR degradation ability of the ZIF/LC composite material prepared by the present invention repeated several times.
Detailed Description
The following examples are helpful in understanding the present invention, but are not limited to the summary of the invention. The simple replacement or improvement of the present invention by those skilled in the art is within the technical scheme of the present invention.
Example 1
A preparation method for synthesizing a metal organic framework/loofah sponge composite material by utilizing zinc-containing wastewater mainly comprises the following steps:
soaking retinervus Luffae fructus in distilled water for 8 hr, drying, ultrasonic treating in 1% NaOH solution for 10 min, and treating with 45%oStirring for 2 h under C, washing with distilled water to neutrality, and purifying at 45 deg.CoAnd C, drying to obtain the activated loofah sponge for later use. And (2) transferring the loofah sponge into water, performing ultrasonic treatment for 10 min, preparing 5% of 2-methylimidazole solution, and mixing the loofah sponge and imidazole according to the mass ratio of 1: adding activated retinervus Luffae fructus into 2-methylimidazole solution at an amount of 10, and performing ultrasonic treatment for 5 min at 25%oStirring for 2 h under C. Then, mixing imidazole and waste liquor according to the mass ratio of 1: 0.5 dropwise adding waste liquid, stirring for 1 hr, washing with distilled water, and passing through 50 deg.CoAnd C, drying to obtain the ZIF/LC composite material.
Example 2
A preparation method for synthesizing a metal organic framework/loofah sponge composite material by utilizing zinc-containing wastewater mainly comprises the following steps:
soaking retinervus Luffae fructus in distilled water for 8 hr, drying, ultrasonic treating in 3% NaOH solution for 20 min, and treating with 45%oStirring for 4 h under C, washing with distilled water to neutrality, and purifying at 45 deg.C oAnd C, drying to obtain the activated loofah sponge for later use. Transferring the loofah sponge into water, performing ultrasonic treatment for 15 min, preparing 20% of 2-methylimidazole solution, and mixing the loofah sponge and imidazole according to the mass ratio of 1: adding activated retinervus Luffae fructus into 2-methylimidazole solution at an amount of 20, and performing ultrasonic treatment for 15 min at 55oStirring for 3 h under C. Then, mixing imidazole and waste liquor according to the mass ratio of 1: 1 dropwise adding waste liquid, stirring for 3 h, washing with distilled water, and passing through a 50 deg.C washing machineoAnd C, drying to obtain the ZIF/LC composite material.
Example 3
A preparation method for synthesizing a metal organic framework/loofah sponge composite material by utilizing zinc-containing wastewater mainly comprises the following steps:
soaking retinervus Luffae fructus in distilled water for 12 hr, drying, ultrasonic treating in 5% NaOH solution for 50 min, and treating with 45%oStirring for 6 h under C, washing with distilled water to neutrality, and purifying at 45 deg.CoAnd C, drying to obtain the activated loofah sponge for later use. Transferring the loofah sponge into water, performing ultrasonic treatment for 10 min, preparing 15% 2-methylimidazole solution, and mixing the loofah sponge and imidazole according to the mass ratio of 1: adding activated retinervus Luffae fructus into 2-methylimidazole solution at an amount of 30, and performing ultrasonic treatment for 20 min at 85%oStirring for 5 h under C. Then, mixing imidazole and waste liquor according to the mass ratio of 1: 2 dropwise adding waste liquid, stirring for 4 h, washing with distilled water, and passing through 50 deg.CoAnd C, drying to obtain the ZIF/LC composite material.
Example 4
A preparation method for synthesizing a metal organic framework/loofah sponge composite material by utilizing zinc-containing wastewater mainly comprises the following steps:
soaking retinervus Luffae fructus in distilled water for 12 hr, drying, ultrasonic treating in 3% NaOH solution for 30 min, and treating with 45%oStirring for 4 h under C, washing with distilled water to neutrality, and purifying at 45 deg.CoAnd C, drying to obtain the activated loofah sponge for later use. Transferring the loofah sponge into water, performing ultrasonic treatment for 10 min, preparing 5% of 2-methylimidazole solution, and mixing the loofah sponge and imidazole according to the mass ratio of 1: adding activated retinervus Luffae fructus into 2-methylimidazole solution at an amount of 20, and performing ultrasonic treatment for 15 min at 55oStirring for 4 h under C. Then, mixing imidazole and waste liquor according to the mass ratio of 1: 1.5 dropwise adding the waste liquid, continuously stirring for 2 h, washing with distilled water, and filtering50 oAnd C, drying to obtain the ZIF/LC composite material.
Example 5
A preparation method for synthesizing a metal organic framework/loofah sponge composite material by utilizing zinc-containing wastewater mainly comprises the following steps:
soaking retinervus Luffae fructus in distilled water for 12 hr, drying, and transferring to 2% H5IO6And 2% of Na5IO6Sonicate in solution for 20 min, then at 45%oStirring for 3 h under C, washing with distilled water to neutrality, and washing with 45%oAnd C, drying to obtain the activated loofah sponge for later use. Transferring the loofah sponge into water, performing ultrasonic treatment for 20 min, preparing 20% of 2-methylimidazole solution, and mixing the loofah sponge and imidazole according to the mass ratio of 1: adding activated retinervus Luffae fructus into 2-methylimidazole solution at an amount of 20, and performing ultrasonic treatment for 20 min at 35oStirring for 4 h under C. Then, mixing imidazole and waste liquor according to the mass ratio of 1: 1 dropwise adding waste liquid, stirring for 3 h, washing with distilled water, and passing through a 50 deg.C washing machineoAnd C, drying to obtain the ZIF/LC composite material.
The following is a characterization analysis for the metal organic framework/loofah sponge composite material of the present invention.
As can be seen from FIG. 1, ZIF-8 (as-ZIF-8) directly synthesized using water as a solvent agreed with the characteristic peak of standard ZIF-8, indicating that ZIF-8 was successfully prepared in an aqueous phase. In addition, the characteristic peak of ZIF-ALL synthesized from wastewater before 20 ℃ is consistent with that of ZIF-8, while the peak intensity of the characteristic peak after 20 ℃ is greatly reduced, which is probably due to the influence of various metals in the wastewater. Characteristic peaks of ZIF-ALL and loofah sponge can be observed from an XRD pattern of the ZIF/LC composite material, and the successful preparation of the composite material is indicated. As can be seen from FIG. 2, the infrared absorption peaks for both ZIF-ALL and LC appear in the ZIF/LC composite, indicating the successful preparation of the composite. Meanwhile, the rest absorption peaks are not found in the infrared peak of the composite material, which shows that the two are mainly connected by the action of hydrogen bonds. As can be seen from fig. 3, the prepared ZIF/LC composite material has a small difference from the ultraviolet-visible light diffuse reflection data of ZIF-8, indicating that the energy band gaps of the ZIF/LC composite material and ZIF-8 are substantially identical. As can be seen from FIG. 4, compared with the ZIF-8 material, the fluorescence intensity of the prepared ZIF/LC composite material is greatly reduced, which shows that the ZIF/LC composite material greatly reduces the recombination velocity of photo-generated electrons and holes, thereby enhancing the photocatalytic capability of the ZIF/LC composite material. As can be seen from FIG. 5, the prepared ZIF/LC composite material is used for carrying out a photocatalytic experiment on three dyes, and the result shows that the prepared ZIF/LC composite material can realize a good degradation effect on the degradation of the three dyes. As can be seen from FIG. 6, the removal rate of Congo red from the ZIF/LC composite material was still 74% after 5 cycles.
In conclusion, the method for preparing the organic frame/loofah sponge composite material has the advantages of simplicity in operation and environmental friendliness. The composite material is low in cost, realizes the cyclic regeneration of wastewater, provides a new solution for the treatment of wastewater, has a good degradation effect on methylene blue, rhodamine B and Congo red, and can be separated from water and reused for multiple times by means of the simple mechanical structure of the loofah sponge.
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "root", "inner", "outer", "peripheral", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for the purpose of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Where "inside" refers to an interior or enclosed area or space. "periphery" refers to an area around a particular component or a particular area.
In the description of the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the embodiments of the invention, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the embodiments of the present invention, it is to be understood that "-" and "-" denote ranges of two numerical values, and the ranges include endpoints. For example, "A-B" means a range greater than or equal to A and less than or equal to B. "A to B" represents a range of A or more and B or less.
In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. A method for preparing ZIFs/loofah sponge composite material by utilizing zinc-containing wastewater mainly comprises the following steps:
(1) transferring the 2-methylimidazole into a beaker, adding water, and stirring until the 2-methylimidazole is completely dissolved to obtain a 2-methylimidazole solution with the mass fraction of 5-20%;
(2) ultrasonically dispersing activated retinervus Luffae fructus in water for 10-30 min, transferring into 2-methylimidazole solution, ultrasonically dispersing for 5-20 min, and further ultrasonic dispersing at 25-85%oC, continuously stirring for 2-5 h;
(3) dropwise adding the zinc-containing waste liquid into the mixed liquid obtained in the step (2), continuously stirring for 1-4 h, taking out the loofah sponge, cleaning with distilled water, and purifying by 50oAnd C, drying.
2. The method of preparing ZIFs/loofah composites according to claim 1, wherein the activation process of loofah is:
(11) cleaning retinervus Luffae fructus, soaking in water for 8-16 hr, 45%oC, drying;
(12) transferring the loofah sponge treated in the step (11) into an activating agent, performing ultrasonic dispersion for 10-50 min, and then performing ultrasonic dispersion at 45 DEGoStirring for 2-6 h under C;
(13) washing the loofah sponge obtained in the step (12) to be neutral, and then washing 45oAnd C, drying to obtain the activated loofah sponge.
3. The process for the preparation of ZIFs/loofah composites according to claim 1, wherein: the zinc-containing waste liquid comprises 10.0-20.0 g/L, Cr 3.0.0-7.0 g/L, Co 1.0.0-2.0 g/L, Fe 0.01.01-0.10 g/L, W0-0.50 g/L of at least one of Zn.
4. The process for the preparation of ZIFs/loofah composites according to claim 2, characterized in that: the activating agent is NaOH or H5IO6Or Na5IO6At least one of the solutions.
5. The process for the preparation of ZIFs/loofah composites according to claim 2, characterized in that: the mass fraction of the activating agent is 1-5%.
6. The process for the preparation of ZIFs/loofah composites according to claim 1, wherein: the mass fraction of the 2-methylimidazole is 5-20%.
7. The process for the preparation of ZIFs/loofah composites according to claim 1, wherein: in the step (2), the mass ratio of the activated loofah sponge to the 2-methylimidazole is 1: (10-30).
8. The process for the preparation of ZIFs/loofah composites according to claim 1, wherein: in the step (3), the mass ratio of the 2-methylimidazole to the waste liquid is 1: (0.5-2).
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN113773518A (en) * 2021-10-08 2021-12-10 南昌航空大学 Method for preparing metal-organic framework material HKUST-1 from copper-containing industrial wastewater
CN114345305A (en) * 2022-01-14 2022-04-15 河南理工大学 NH2-UiO-66@ LS composite material, and preparation method and application thereof

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