KR20210008603A - Zirconium-alkoxide hybrid material for removing toxic anion adsorption and its preparation method, and and adsorption removal method of toxic anions using the same - Google Patents

Abstract

The present invention relates to a zirconium-alkoxide hybrid material for adsorbing and removing toxic anions and, more particularly, to a zirconium-alkoxide hybrid material for adsorbing and removing toxic anions such as a trivalent arsenic anion (arsenite (AsO_3^3-)), a pentavalent arsenic anion (arsenate (AsO_4^3-)), a dichromate anion (Cr_2O_7^2-), a phosphate anion (PO_4^3-), a fluorine anion (F^-), and a selenate anion (SeO_4^2-), a method for preparing the same, and a method for adsorbing and removing toxic anions using the same. The present invention provides a zirconium-alkoxide hybrid material for adsorbing and removing toxic anions, a method for preparing the same, and a method for adsorbing and removing toxic anions using the same, thereby effectively removing toxic anions that are harmful to the human body and cause environmental pollution compared to conventional adsorbents, and providing the effect of removing various toxic anions. These hybrid materials have high stability against toxic anions, have a nano-size for high usability, maintain adsorption efficiency for toxic anions over time, and have the effect of being reusable.

Description

Zirconium-alkoxide hybrid material for removing toxic anion adsorption and its preparation method, and and adsorption removal method of toxic anions using the same }

The present invention relates to a zirconium-alkoxide hybrid material for adsorption and removal of toxic anions, and in detail, trivalent arsenic anion (arsenite (AsO ₃ ^3- )), dichromate anion (Cr ₂ O ₇ ^2- ), phosphate anion (PO ₄ ^3- ), and fluorine anion (F ^- ) to a toxic anion adsorption and removal zirconium-alkoxide hybrid material for the adsorption removal and a method for producing the same, and a method for adsorbing and removing toxic anions using the same.

Arsenic (As) is a first group carcinogen and is not only present in wastewater, slag, dust, etc. from manufacturing plants such as mines, smelters, arsenic acid, arsenic acid, etc., or factories using the process using them, but also used for trees and crops. It is also present in pesticides and contaminates soil, wells, and rivers in the surrounding area. In addition, arsenic is detected in natural soil, seawater, rainwater, and air. In particular, mountain regions contain a large amount of arsenic due to the nature of the mother rock.

In nature, arsenic exists as an inorganic compound in two forms, neutral ionic trivalent arsenic (arsenate) and anionic pentavalent arsenic (arsenate), and exist in the form of trivalent (arsenite) and pentavalent (arsenate). As a metalloid, trivalent arsenic is known to be about 10 times more toxic than pentavalent arsenic.

Chromium (VI) is known to be a toxic anion, and there are dichromate anion (Cr ₂ O ₇ ^2- ) and chromic acid ion (CrO ₄ ^2- ). Chromium (Cr) diffuses through the cell membrane and can oxidize biological molecules, so it is classified as a toxic and carcinogenic ion. It is mainly added to electroplating, leather tanning, printing, cement, and pigments, and is exposed to the environment by being used in these industries, causing a problem. The World Health Organization (WHO) specifies a maximum allowable concentration of chromium in drinking water of 50 µg/L.

Phosphoric acid is mainly discharged from the manufacturing process of fertilizers, detergents and pesticides, contaminating the soil, wells, and rivers in the surrounding area. Significant environmental problems, such as the reduction of microorganisms in the water and destruction of the ecosystem, are occurring due to the phosphoric acid discharged in this way.

Fluoride is a toxic substance that can cause a variety of physical disorders, including fluorosis, thyroid disease, brain damage and infertility.However, 200 million people worldwide consume water that is higher than the fluoride concentration in drinking water prescribed by the WHO. Is causing big social problems.

These toxic anions are exposed to various environments and cause serious diseases and environmental pollution. Accordingly, Korean Patent Registration No. 10-1599367 shows that perchlorate (ClO ^4- ) and nitrate (NO ^3- ) can be removed from wastewater through a metal catalyst-supported anion exchange resin and a method of removing toxic anions using the same. Although disclosed, there are problems in that the types of toxic anions that can be removed are limited, and a reactor is required to remove toxic anions using an exchange resin.

(Patent Document 1) KR 10-1599367 B1 (Patent Document 2) KR 10-1925710 B1

In order to solve the above problems, an object of the present invention is to provide a zirconium-alkoxide hybrid material for adsorption and removal of toxic anions.

In addition, it is an object of the present invention to provide a method for preparing a zirconium-alkoxide hybrid material for adsorption and removal of toxic anions.

In addition, an object of the present invention is to provide a method for adsorbing and removing toxic anions using a zirconium-alkoxide hybrid material.

In order to solve the above object, the present invention,

It provides a zirconium-alkoxide hybrid material for adsorption removal of toxic anions represented by the following formula 1:

[Equation 1]

Zr(OH) _x (H ₂ O) _y (O-CH ₂ ) _z

Each of x, y, and z is an integer of 1 to 4.

In order to solve the above other object, the present invention,

A first step of adding zirconium, urea, and a catalyst to ethylene glycol and mixing to form a mixture;

A second step of stirring and heating the mixture to form a reactant; And

It provides a method for producing a zirconium-alkoxide hybrid material for removing toxic anions adsorption comprising a third step of washing and drying the reactant.

In order to solve the another object, the present invention,

It provides a method for adsorption and removal of toxic anions using a zirconium-alkoxide hybrid material represented by the following Formula 1:

[Equation 1]

Zr(OH) _x (H ₂ O) _y (O-CH ₂ ) _z

Each of x, y, and z is an integer of 1 to 4.

The present invention provides a zirconium-alkoxide hybrid material for adsorption and removal of toxic anions, a method for producing the same, and a method for adsorbing and removing toxic anions using the same. It can be removed, and has the effect of removing various toxic anions.

Such a hybrid material has high stability against toxic anions, has high utilization in nano size, can maintain adsorption efficiency for toxic anions over time, and can be reused.

1 shows a mechanism for synthesizing a nano-adsorbent and an adsorption mechanism for toxic anions according to an embodiment of the present invention.
2 is a graph showing a PXRD pattern of a nano adsorbent according to an embodiment of the present invention.
3 is a graph showing an FTIR spectrum of a nano adsorbent according to an embodiment of the present invention.
4A is an SEM image of a nano adsorbent according to an embodiment of the present invention.
4B is a graph showing the BET characteristic analysis result of the nano adsorbent according to an embodiment of the present invention.
5A is a graph showing the adsorption density of toxic anions of a nano adsorbent according to an embodiment of the present invention.
5B is a graph showing the molar ratio of toxic anions and zirconium after adsorption of toxic anions of the nano-adsorbent according to an embodiment of the present invention.
6 is a graph showing a change in toxic anion adsorption efficiency over time of a nano adsorbent according to an embodiment of the present invention.
7 is a graph showing the adsorption efficiency of toxic anions according to reuse of the nano-adsorbent according to an embodiment of the present invention.

In the present specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated. In addition, terms used in the present specification are for describing embodiments, and are not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless specifically stated in the phrase.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a zirconium-alkoxide hybrid material for adsorption and removal of toxic anions, a method for producing the same, and a method for adsorbing and removing arsenic ions using the same.

According to one aspect, the present invention provides a zirconium-alkoxide hybrid material for adsorption and removal of toxic anions represented by the following Formula 1:

[Equation 1]

Zr(OH) _x (OH ₂ ) _y (O-CH ₂ ) _z

Each of x, y, and z is an integer of 1 to 4. When x or y exceeds 4, the electronegativity becomes too large to adsorb toxic anions, and when z exceeds 4, the number of functional groups that can bind to the toxic anions decreases, making it difficult to adsorb toxic anions.

Toxic anion in the invention is a trivalent anion arsenic ^{_{(arsenite (AsO 3 3-))}} , anion dichromate (Cr ₂ O ₇ ^2-), phosphate anion (PO ₄ ^3-), and a fluorine anion (F ^-) the group consisting of It may be at least one selected from, and preferably at least one selected from the group consisting of a trivalent arsenic anion (arsenite (AsO ₃ ^3- )) and a phosphate anion (PO ₄ ^3- ).

The zirconium-alkoxide hybrid material for adsorption and removal of toxic anions of the present invention may be formed using zirconium (Zr), urea, and ethylene glycol (EG), preferably zirconium; Zr), urea, ethylene glycol (EG), and a catalyst can be used, and such hybrid materials are zirconium hydroxide (Zr-OH) formed by urea at high pH conditions. It can be formed in the form of attaching ethylene glycol to ₄ ).

In the present invention, ethylene glycol acts as a strong reducing agent having a high boiling point, and a metal-alkoxide can be prepared through a polyol process. Ethylene glycol has the property of an electron donor to donate electrons, so when it reacts with Zr(OH) ₄ , it donates electrons to zirconium. At this time, it forms a metal electron cloud to transfer electrons to the OH group.

The catalyst that can be used in the formation of the zirconium-alkoxide hybrid material of the present invention may be one or more selected from the group consisting of dodecyltrimethylammonium bromide (DTAB), and tetradecyltrimethylammonium bromide (TDTAB). , It may be preferably dodecyltrimethylammonium bromide (DTAB).

Such a catalyst may be used as a phase transfer catalysis (PTC), and may be used to attach ethylene glycol to zirconium hydroxide (Zr(OH) ₄ ).

In summary, zirconium ions (Zr ⁴⁺ ) react with urea in a solution whose pH is increased by urea to form zirconium hydroxide (Zr(OH) ₄ ), and the formed Zr(OH) ₄ is ethylene glycol. And a strong ligand is formed and bonded.At this time, Zr(OH) ₄ and ethylene glycol can be combined by forming a ligand in the form of a monodentate or bidentate by a catalyst. The zirconium-alkoxide hybrid material of the present invention thus formed is structurally and chemically more stable than Zr(OH) ₄ and has a wider surface area so that toxic anions can be adsorbed and removed faster than conventional adsorption removers, and higher adsorption efficiency. Can be indicated.

The zirconium-alkoxide hybrid material of the present invention may be in the form of a nano-sized powder, and preferably may be in the form of a powder having a size of 1 to 5000 nm. When the zirconium-alkoxide hybrid material is larger than 5000 nm, the binding ability with toxic anions may be reduced.

The zirconium-alkoxide hybrid material of the present invention can adsorb and remove toxic anions by ligand exchange or electrostatic attraction. Hybrid materials are formed through a series of processes in which ethylene glycol binds to Zr(OH) _{4 through} the formation of a strong ligand to stably form a diatomic complex, i.e., complex, and thus -OH is relatively weakly bound to the hybrid material. Ligand exchange between functional groups and toxic anions is facilitated, so that toxic anions can be absorbed and detained. In addition, when a hybrid material is exposed to an acidic condition with a low pH, the -OH functional group weakly bound to the hybrid material is protonated (bonded with the proton) and has a positive charge.Therefore, ionic bonding due to the electrostatic attraction of cations and anions It can also remove toxic anions.

An example of the process of forming the zirconium-alkoxide hybrid material of the present invention, the structural formula of the formed zirconium-alkoxide hybrid material, and the mechanism of adsorption of toxic anions by the hybrid material is shown in FIG. 1 below.

According to another aspect, the present invention provides a first step of adding zirconium, urea, and a catalyst to ethylene glycol and mixing to form a mixture; A second step of stirring and heating the mixture to form a reactant; And a third step of washing and drying the reactant. It provides a method for producing a zirconium-alkoxide hybrid material for removing toxic anions adsorption.

The catalyst may be one or more selected from the group consisting of dodecyltrimethylammonium bromide (DTAB), and tetradecyltrimethylammonium bromide (TDTAB), preferably dodecyltrimethylammonium bromide (DTAB). ) Can be.

In the first step of the method for producing a zirconium-alkoxide hybrid material of the present invention, the weight ratio of zirconium, urea, and catalyst may be 1: 2-5: 6-10, preferably 1: 2-3: It may be 6-8, and if the weight ratio of zirconium, urea, and catalyst is out of 1: 2-5: 6-10, the number of functional groups that can bind to the toxic anion decreases, thereby reducing the ability to adsorb and remove toxic anions. It can be degraded.

In the second step of the method for preparing a zirconium-alkoxide hybrid material of the present invention, the mixture may be heated to a temperature of 100 to 140°C, preferably 110 to 130°C. The process of heating the mixture is to increase the reactivity of the mixture to form a stable zirconium hydroxide (Zr-hydroxide; Zr(OH) ₄ ) complex, and when the heating temperature exceeds 100 to 140°C, the bonding strength of the complex decreases and formation is difficult. It can be difficult.

According to another aspect, the present invention provides a method for adsorbing and removing toxic anions using a zirconium-alkoxide hybrid material represented by the following formula:

[Equation 1]

Zr(OH) _x (OH ₂ ) _y (O-CH ₂ ) _z

Each of x, y, and z is an integer of 1 to 4. When x or y exceeds 4, the electronegativity becomes too large to adsorb toxic anions, and when z exceeds 4, the number of functional groups that can bind to the toxic anions decreases, making it difficult to adsorb toxic anions.

Toxic anion is trivalent arsenic anions ^{_{(arsenite (AsO 3 3-))}} , anion dichromate (Cr ₂ O ₇ ^2-), phosphate anion (PO ₄ ^3-), and a fluorine anion (F ^-) is selected from the group consisting of It may be more than one, preferably at least one selected from the group consisting of a trivalent arsenic anion (arsenite (AsO ₃ ^3- )), and a phosphate anion (PO ₄ ^3- ).

Since the description of the zirconium-alkoxide hybrid material and the toxic anion adsorption removal mechanism used in the method for adsorption and removal of toxic anions of the present invention is the same or similar to the above description of the zirconium-alkoxide hybrid material for adsorption and removal of toxic anions of the present invention, I will omit it.

The present invention will be described in more detail by the following examples. However, the following examples are intended to illustrate the present invention, and the scope of the present invention is not limited by the examples. The disclosure of the present invention is provided to be complete, and to fully inform the scope of the invention to those of ordinary skill in the art to which the present invention pertains.

<Example>

Example 1-Preparation of zirconium-alkoxide hybrid material (nano adsorbent) for adsorption and removal of toxic anions

ZrCl ₄ · 4H ₂ O (4.06 mmol) 0.9508 g, urea (36.6 mmol) 2.2 g, and dodecyltrimethylammonium bromid (DTAB, 18.6 mmol) 5.735 g were added to 180 mL of ethylene glycol (EG) and mixed to prepare a cloudy mixture. At this time, Zr ⁴⁺ ions and urea reacted to form a Zr-urea complex (Zr-hydroxide, Zr(OH) ₄ ) by precipitation. Thereafter, the mixed solution was stirred at 120° C., and after 20 minutes, the cloudy mixed solution became transparent, and after 70 minutes, it changed to a white solution again. After the reaction, a zirconium-alkoxide hybrid material in the form of attaching EG on Zr(OH) ₄ was synthesized, washed with distilled water and ethanol, dried at 80° C. for 24 hours, and finally powdered nano-adsorbent (Zr-Alk) was prepared. Was prepared.

<Experimental Example>

Experimental Example 1-PXRD analysis test

In order to compare and analyze the Powder X Ray Diffraction (PXRD) pattern of the nano-adsorbent according to the above embodiment, the Ultima IV diffractometer (RIGAKU, D/Max-2500) system in the Cu-Kα radiation condition in the 2θ range of 0 to 80° Using the PXRD analysis test was performed.

Experimental Example 2-FTIR analysis test

In order to analyze the functional groups of the nano-adsorbent according to the above example, the transmission mode was analyzed using the Jasco FTIR-670 Plus spectrophotometer system in the range of 400 to 4,000 cm ^-1 wavenumber using the Fourier-Transform Infrared Spectroscopy (FTIR) technique.

Experimental Example 3-1-SEM measurement test

The surface of the nano-adsorbent according to the above example was observed at a magnification of 5000 times using a scanning electron microscope (SEM).

Experimental Example 3-2-BET analysis test

The specific surface area and particle size of the nano-adsorbent according to the above example were analyzed using a BET specific surface analyzer (Brunauer Emmett Teller, BET).

Experimental Example 4-Batch adsorption experiment

The nano-adsorbent (1 g/L) according to the above embodiment was used as a trivalent arsenic anion (arsenite (AsO ₃ ^3- )), a dichromate anion (Cr ₂ O ₇ ^2- ), a phosphate anion (PO ₄ ^3- ), and fluorine. anion (F ^-) was added to a polypropylene bottle containing each at a concentration of 1 mM. Thereafter, the mixture was mixed at a speed of 100 rpm using a stirrer at 25° C., and after the reaction for 24 hours was completed, the adsorption removal rate by the nano adsorbent was confirmed using a different method according to each anion.

After the reaction was completed, the concentrations of arsenic and chromium remaining in the reaction solution were analyzed using an inductively coupled plasma optimal emission spectrometer (ICP-OES), and the concentration of phosphate anions was determined by filtering the reaction solution (0.2㎛) and then the vanadomolybdate method. Using a spectrometer, the concentration of fluorine anion was measured by ion chromatography using an AS-20 anion column.

In addition, the content of zirconium released during or after adsorption of toxic anions was completed was analyzed by ICP-OES.

Experimental Example 5-Desorption test of nano adsorbent

In order to confirm the reusability of the nano-adsorbent according to the above embodiment, NaOH (0.1 M) was used as a desorption solvent after adsorption of toxic anions to make the nano-adsorbent and 1 g/L concentration, and 100 rpm using a stirrer at 25°C. After the reaction for 6 hours was completed by mixing at a rate of, the nanoadsorbent was recovered again through a centrifuge. After drying this at 60° C. for 12 hours or more, the adsorption efficiency according to the number of reuse of the nano-adsorbent was confirmed by using a different method according to each anion using the same method as in Example 4.

<Evaluation and results>

Results 1-PXRD analysis of nano adsorbent

The PXRD pattern of the nano adsorbent according to Example 1 was confirmed according to Experimental Example 1, and a graph showing a comparison with the PXRD pattern of Zr(OH) ₄ is shown in FIG. 2.

As a result, the nano-adsorbent formed a strong low-angle phase of amorphous, amorphous form related to the interlayer spacing of a thin plate structure completely different from the peak of the PXRD pattern of ZrO ₂ according to JSPDS:01-077-5342, that is, the interlayer spacing of the lamellar structure. It was confirmed that it was shown.

The form of such a nano-adsorbent can be defined as a metal-oxygen sheet separated from the anion of ethylene glycolate, and the absence of structural data of the nano-adsorbent is due to zirconium ions. It shows the same PXRD pattern, and it is judged to have some degree of constant structure.

Results 2-FTIR analysis of nano-adsorbent

The nano-adsorbent according to Example 1 and the FTIR spectrum of Zr(OH) ₄ were confirmed according to Experimental Example 2, which is shown in FIG. 3.

As a result, 1457cm showing the bending vibration of -CO ₂ in the spectra of nano-adsorbent (Zr-Alk) ^-, 661cm showing the bending vibration of ZrO ^- were able to determine the peak, -CH by attaching a glycol in the ZrO _{2 It} was confirmed that the strong peak of ₂ appeared.

On the other hand, the bending vibration of -OH was found to be weaker than that of ZrO ₂ , which is believed to be due to adhesion of ethylene glycol. This result means that the nano-adsorbent (Zr-Alk) was successfully synthesized according to Example 1.

Results 3-Surface analysis of nano-adsorbent

The SEM image of the nano-adsorbent according to Example 1 was measured according to Experimental Example 3-1, and the image was In Fig. 4a As shown, it was confirmed that the surface of the nano-adsorbent was aggregated into a very small complex, and the size was about 1000 nm.

In addition, the specific surface area, pore size distribution, and particle size of the nano adsorbent according to Example 1 were analyzed according to Experimental Example 3-2, and the graphs and results are shown in FIG. 4B. Through this, the N ₂ adsorption and desorption isothermal adsorption equation to the pore material could be obtained in the form of V = f (P/P _o ). When this is converted into a multi-point surface area, the BET surface area of the nano adsorbent is 8.2 m ² /g, It was confirmed that the pore volume was 0.030 cm ³ /g, and the average pore size was 14.72 nm.

The characteristics of the surface of the nano-adsorbent are considered to be because the nano-sized adsorbent particles have a surface charge and thus aggregate to stabilize the structure.

Results 4-Adsorption rate of toxic anions of nano adsorbent

The adsorption efficiency of the nano-adsorbent according to Example 1 to toxic anions was confirmed according to Experimental Example 4, which is shown in FIGS. 5A and 5B.

In Figure 5a, the toxic anion adsorption density of the nano-adsorbent was high in the order of trivalent arsenic anion, phosphate anion, dichromate anion, fluorine anion, pentavalent arsenic anion, and selenate anion, and toxic anion (x) and zirconium in Figure 5b. The molar ratio of (M) also appeared the same. The selenate anion is judged to have a lower adsorption density than other toxic anions due to the size and charge of the anion, and the pentavalent arsenic anion has a lower adsorption density, but it is judged that adsorption removal is possible.

In particular, the nano-adsorbent of the present invention was found to have very high adsorption density for trivalent arsenic anion, phosphate anion, dichromate anion, and fluorine anion, indicating that one adsorbent exhibited adsorption capacity for various toxic anions.

Since zirconium has relatively weak acid properties, it can be seen that it can stably and stably form adducts with trivalent arsenic anions, which are relatively weak acids compared to pentavalent arsenic anions, and a stable structure after synthesis of the nano-adsorbent of the present invention It can be seen that the -OH functional groups relatively weakly bound to the toxic anions easily and quickly exchange ligands with the toxic anions to form a complex while the toxic anions are efficiently adsorbed and removed by the nano-adsorbent.

In addition, the change in adsorption efficiency of the nano-adsorbent with time for the trivalent arsenic anion, phosphate anion, dichromate anion, fluorine anion and selenate anion was confirmed according to Experimental Example 4, which is shown in FIG.

As a result, the maximum adsorption density in the trivalent arsenic anion was 0.9 mmol/g or more, almost 1 mmol/g, and after the start of adsorption, the adsorption density increased rapidly and continued to increase until 400 minutes. In addition, it was confirmed that this adsorption density was steadily maintained up to 1400 minutes. In addition, it was found that phosphate anion, dichromate anion, fluorine anion, and selenate anion also rapidly increased after adsorption was started, and then steadily maintained the adsorption density until 1400 minutes, through which the adsorption efficiency of the nanoadsorbent of the present invention Even after this time, it was confirmed that it was maintained continuously.

Results 5-Reusability and stability of nano-adsorbent

The reusability and stability of the nano-adsorbent according to Example 1 were confirmed according to Experimental Examples 4 and 5.

As a result, when 0.1 M NaOH was used as the desorption solvent, it was confirmed that the nano-adsorbent could be separated and extracted again from the toxic anions adsorbed by the strong interaction of the nano-adsorbent and NaOH, and the separated nano-adsorbent was toxic. It was found that it can be reused as an anion adsorbent.

Subsequently, the reusability test of the nano adsorbent was repeated five times in a row, and the trivalent arsenic anion (arsenite (AsO ₃ ^3- )), dichromate anion (Cr ₂ O ₇ ^2- ), and phosphate anion (PO ₄ ^3), and a fluorine anion (F ^- to determine the effect of adsorption) is shown in Fig.

As a result, it was confirmed that the adsorption efficiency of the nano-adsorbent was maintained even when the trivalent arsenic anion was reused for 3 times, and the adsorption efficiency did not decrease even when the dichromate anion was reused 4 times and the phosphoric acid and fluorine anion 2 times I was able to confirm it. In addition, the adsorption efficiency of phosphoric acid and fluorine anions is improved after reusing the nano adsorbent twice Although it decreased slightly, it was found that the adsorption efficiency was maintained without effective reduction until reused 5 times. The fact that the adsorption efficiency does not change despite the reuse of the nano-adsorbent means that the nano-adsorbent is very stable for each toxic anion regardless of the presence or absence of NaOH. It is believed that the decrease in adsorption efficiency of the nano-adsorbent is due to inactivation of the active site due to the loss of the nano-adsorbent in the process of separating and extracting the nano-adsorbent from the adsorbed toxic anions.

In addition, as a result of measuring the salivary line concentration of zirconium after each process of the reusability test of the nano-adsorbent, it was confirmed that no effective reduction value appeared, and it was confirmed that the nano-adsorbent could continue to maintain structural stability.

Therefore, the nano-adsorbent of the present invention is excellent in reusability and structural stability, and accordingly, it is judged that the absorption efficiency of toxic anions can be steadily maintained.

Claims (13)

Zirconium-alkoxide hybrid material for adsorption and removal of toxic anions represented by the following Formula 1:
[Equation 1]
Zr(OH) _x (H ₂ O) _y (O-CH ₂ ) _z
Each of x, y, and z is an integer of 1 to 4.
The method of claim 1,
The toxic anion is trivalent arsenic anions ^{_{(arsenite (AsO 3 3-))}} , anion dichromate (Cr ₂ O ₇ ^2-), phosphate anion (PO ₄ ^3-), and a fluorine anion (F ^-) is selected from the group consisting of Zirconium-alkoxide hybrid material for adsorption removal of toxic anions, characterized in that at least one.
The method of claim 1,
The hybrid material is a zirconium-alkoxide hybrid material for adsorption removal of toxic anions, characterized in that the nano-sized powder form.
The method of claim 1,
The hybrid material is a zirconium-alkoxide hybrid material for adsorption and removal of toxic anions, wherein the hybrid material is formed using a catalyst.
The method of claim 4,
The catalyst is at least one selected from the group consisting of dodecyltrimethylammonium bromide (DTAB), and tetradecyltrimethylammonium bromide (TDTAB).
The method of claim 1,
The hybrid material is a zirconium-alkoxide hybrid material for adsorption and removal of toxic anions, characterized in that the toxic anions are adsorbed and removed by ligand exchange or electrostatic attraction.
A first step of adding zirconium, urea, and a catalyst to ethylene glycol and mixing to form a mixture;
A second step of stirring and heating the mixture to form a reactant; And
A method for producing a zirconium-alkoxide hybrid material for removing toxic anion adsorption, comprising: a third step of washing and drying the reactant.
The method of claim 7,
The catalyst is at least one selected from the group consisting of dodecyltrimethylammonium bromide (DTAB), and tetradecyltrimethylammonium bromide (TDTAB), wherein the zirconium-alkoxide hybrid material for removing toxic anions Manufacturing method.
The method of claim 7,
In the first step, the weight ratio of zirconium, urea, and catalyst is 1: 2-5: 6-10. Method for producing a zirconium-alkoxide hybrid material for removal of toxic anion adsorption.
The method of claim 7,
The second step is a method of producing a zirconium-alkoxide hybrid material for removing toxic anions, characterized in that heating the mixture to a temperature of 100 to 140°C.
Adsorption and removal method of toxic anions using a zirconium-alkoxide hybrid material represented by the following formula 1:
[Equation 1]
Zr(OH) _x (H ₂ O) _y (O-CH ₂ ) _z
Each of x, y, and z is an integer of 1 to 4.
The method of claim 11,
The method for adsorbing and removing toxic anions using a zirconium-alkoxide hybrid material, wherein the toxic anions are detected in soil, air or water.
The method of claim 11,
The toxic anion is trivalent arsenic anions ^{_{(arsenite (AsO 3 3-))}} , anion dichromate (Cr ₂ O ₇ ^2-), phosphate anion (PO ₄ ^3-), and a fluorine anion (F ^-) is selected from the group consisting of Zirconium-alkoxide hybrid material, characterized in that one or more adsorption removal method of toxic anions.

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