CN116850973A - Organic film-coated inorganic framework material and preparation method and application thereof - Google Patents
Organic film-coated inorganic framework material and preparation method and application thereof Download PDFInfo
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- QOYRNHQSZSCVOW-UHFFFAOYSA-N cadmium nitrate tetrahydrate Chemical compound O.O.O.O.[Cd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QOYRNHQSZSCVOW-UHFFFAOYSA-N 0.000 description 2
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- 238000002329 infrared spectrum Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
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- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 1
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Classifications
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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
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- 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
- B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- 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
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Soil Sciences (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides an organic film-coated inorganic framework material, a preparation method and application thereof, and relates to the technical field of heavy metal restoration. In the invention, the cuttlefish bone sheath powder is put into a strong alkali solution to be boiled, and deacetylation is carried out to obtain the organic coating inorganic framework material. After simple and low-cost alkali liquor boiling treatment, the beta-chitin in the cuttlebone organic component is gradually treatedDeacetylation is converted to chitosan. -NH on chitosan backbone 2 and-OH groups can be used as chelation reaction sites and have good coordination chelation effect with heavy metal ions. Therefore, the cuttlebone organic coating inorganic framework material with excellent adsorption performance is prepared by adopting a simple, low-cost, environment-friendly and safe method. The raw material of the organic film-coated inorganic framework material is fishery waste, has wide sources and low price, and can be collected from coastal areas.
Description
Technical Field
The invention relates to the technical field of heavy metal repair, in particular to an organic coating inorganic framework material, a preparation method and application thereof.
Background
Cd is one of the "five-toxin" elements in the environment, and its main sources include industrial wastewater discharge, sewage irrigation, atmospheric settling, and unreasonable use of fertilizers. Cd in the environment can enter the human body through food, water and air, and then accumulate in organs such as liver, kidney, lung, etc. Along with the increase of Cd accumulation in human body, the health of human body can be seriously endangered. In addition, due to the non-degradable nature of Cd, it poses a serious threat to aquatic organisms, soil environmental quality and agricultural product safety. Therefore, the method has great significance in repairing Cd-polluted water and soil.
At present, some restoration techniques are applied to restoration of heavy metal polluted water and soil, for example, an adsorption method, a membrane separation method, an electrochemical method, a biochemical method and the like are used for removing heavy metals in water, and a leaching plant extraction and passivation method and the like are used for restoring the heavy metal polluted soil. The adsorption method is widely applied to the treatment of wastewater containing heavy metals due to the advantages of simplicity, high efficiency, economy and the like. However, some existing adsorbents have high cost and long repair period due to complicated preparation and modification methods, so that the adsorption method is limited in practical application.
Disclosure of Invention
The invention aims to provide an organic film inorganic framework material, a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of an organic film-coated inorganic framework material, which comprises the following steps: boiling the cuttlefish bone sheath powder in strong alkali solution, and deacetylating to obtain the inorganic skeleton material.
Preferably, the strong base solution comprises sodium hydroxide solution.
Preferably, the concentration of the strong base solution is 1-3 mol/L.
Preferably, the boiling time is 0.5 to 3 hours.
Preferably, the particle size of the cuttlefish shell powder is less than or equal to 0.15mm.
The invention provides the organic film-coated inorganic framework material prepared by the preparation method.
The invention provides application of the organic film-coated inorganic framework material as an adsorbent in treating Cd ions in polluted water or polluted soil.
Preferably, the concentration of Cd ions in the polluted water body is 1-30 mg/L.
Preferably, the adding amount of the adsorbent is 1.2-3.6 mg for 100mL of polluted water body.
Preferably, the pH value of the polluted water body is 7-9.
The invention provides a preparation method of an organic film-coated inorganic framework material, which comprises the following steps: boiling the cuttlefish bone sheath powder in strong alkali solution, and deacetylating to obtain the inorganic skeleton material.
After simple and low-cost alkali liquor boiling treatment, the beta-chitin in the cuttlebone organic component is gradually deacetylated and converted into chitosan. -NH on chitosan backbone 2 and-OH groups can be used as chelation reaction sites and have good coordination chelation effect with heavy metal ions. Therefore, the cuttlebone organic coating inorganic framework material with excellent adsorption performance is prepared by adopting a simple, low-cost, environment-friendly and safe method.
The cuttlebone material adopted in the invention consists of about 85% of calcium carbonate skeleton and about 15% of organic matters, is an organic-inorganic matter composite material, combines a firm and stable 'house frame' structure of calcium carbonate and an organic component with good complexing ability for pollutants, and has more excellent performance than mineral calcium carbonate in heavy metal removal due to the unique layered structure of calcium carbonate and the existence of organic matters in cuttlebone. Compared with common adsorbents such as biochar and alkaline materials, the material prepared by the method has the advantages of stable adsorption, good buffering performance and strong fixing capacity, and has important application value for adsorbing and removing pollutants in the environment and reducing migration of heavy metals.
The raw material of the organic film-coated inorganic framework material is fishery waste, has wide sources and low price, and can be collected from coastal areas. The cuttlebone biomass can be changed into an adsorbent for a plurality of pollutants in the environment by using a plurality of simple technical means, and the cuttlebone biomass can be used for environmental remediation and pollution control and can realize the recycling of solid wastes.
Drawings
FIG. 1 is an adsorption isotherm of Cd of the cuttlebone raw powder (CB) prepared in comparative example 1, cuttlebone adsorbent 1 (CB-1) prepared in example 1, and cuttlebone adsorbent 2 (CB-3) prepared in example 2;
FIG. 2 is a Fourier infrared spectrum of the cuttlebone raw powder (CB) prepared in comparative example 1 and cuttlebone adsorbent 2 (CB-3) prepared in example 2.
Detailed Description
The invention provides a preparation method of an organic film-coated inorganic framework material, which comprises the following steps: boiling the cuttlefish bone sheath powder in strong alkali solution, and deacetylating to obtain the inorganic skeleton material.
The raw materials adopted by the invention are all commercial products unless specified.
In the invention, the cuttlebone powder is preferably obtained by scraping, grinding, cleaning and drying the collected cuttlebone. In the present invention, the washing is preferably performed with ultrapure water, and the number of times of washing is preferably 3 to 5 times. In the present invention, the temperature of the drying is preferably 80℃and the time is preferably 72 hours.
In the invention, the particle size of the cuttlefish shell powder is preferably less than or equal to 0.15mm.
In the present invention, the strong alkali solution preferably includes a sodium hydroxide solution, and the concentration of the strong alkali solution is preferably 1 to 3mol/L, more preferably 3mol/L. In the invention, the cuttlebone powder is placed in a strong alkali solution, preferably stirred uniformly, and then boiled. In the present invention, the boiling time is preferably 0.5 to 3 hours, more preferably 1 hour. In the boiling process, the invention converts the beta chitin in cuttlebone organic matters into chitosan, and the chitosan has-NH on the skeleton 2 and-OH groups can be used as chelation reaction sites and have good coordination chelation with heavy metal ions, so that the high adsorption performance of the heavy metal ions is provided.
After the boiling is finished, the invention preferably cleans the obtained solution system with ultrapure water for 3 to 5 times after the solution is cooled, and the solution is centrifuged when the pH value of the solution is 8.5 to 9.5, and the powder is dried to constant weight in an oven at 80 ℃ after the supernatant is poured out, thus obtaining the organic coating inorganic framework material.
The invention provides the organic film-coated inorganic framework material prepared by the preparation method. The organic film-coated inorganic framework material combines a firm and stable 'house frame' structure of calcium carbonate and an organic component (chitosan) with good complexing capacity for pollutants, and the organic film-coated inorganic framework material shows more excellent performance than mineral calcium carbonate in terms of heavy metal removal due to the unique layered structure of the calcium carbonate in cuttlebone and the existence of organic matters. Compared with common adsorbents such as biochar and alkaline materials, the material prepared by the method has the advantages of stable adsorption, good buffering performance and strong fixing capacity, and has important application value for adsorbing and removing pollutants in the environment and reducing migration of heavy metals.
The invention provides application of the organic film-coated inorganic framework material as an adsorbent in treating Cd ions in polluted water or polluted soil.
When the method is used for treating Cd ions in the polluted water body, the concentration of the Cd ions in the polluted water body is preferably 1-30 mg/L; for 100mL of polluted water, the addition amount of the adsorbent is preferably 1.2-3.6 mg, and more preferably 2.40+/-0.02 mg; the pH value of the polluted water body is preferably 7-9, more preferably 7.5+/-0.2. The invention preferably adopts static adsorption to treat Cd ions in the polluted water body; the time of the static adsorption is preferably 120 hours.
The organic film inorganic framework material, the preparation method and the application thereof provided by the invention are described in detail below with reference to examples, but are not to be construed as limiting the scope of the invention.
Comparative example 1
Scraping the collected cuttlebone biomass, scraping the lamellar matrix part of the cuttlebone by a medicine spoon, cleaning the scraped powder with ultrapure water for 3-5 times, drying the powder in an oven at 80 ℃ for 72 hours after removing part of impurities, and sealing and preserving the dried sample in a glass bottle for later use after the sample is completely dried, wherein the adsorbent is named as adsorbent CB.
Example 1
(1) Scraping the collected cuttlebone biomass, scraping the lamellar matrix part of the cuttlebone by a medicine spoon, cleaning the scraped powder with ultrapure water for 3-5 times, drying the powder in an oven at 80 ℃ for 72 hours after removing part of impurities, and sealing and preserving the dried sample in a glass bottle for later use after the sample is completely dried.
(2) And (5) deacetylating the scraped powder. The method comprises the following specific steps: sieving the pretreated cuttlebone powder in the step (1) by a 100-mesh sieve to obtain cuttlebone powder with the particle size less than or equal to 0.15mm. Preparing NaOH solution with the concentration of 1mol/L, placing cuttlebone powder after scraping the sieve into 1mol/L alkali solution, fully stirring, heating by a heating furnace, boiling for 1 hour, closing fire, cleaning by ultrapure water for 3-5 times after the solution is cooled, centrifuging the solution when the pH value of the solution is close to that of the original powder in water, pouring out supernatant, placing the powder into an oven at 80 ℃ for drying, judging whether the cuttlebone powder is completely dried by a weighing method, and obtaining the organic film inorganic framework material after the cuttlebone powder is dried to constant weight, namely the adsorbent 1 (CB-1).
Example 2
(1) Scraping the collected cuttlebone biomass, scraping the lamellar matrix part of the cuttlebone by a medicine spoon, cleaning the scraped powder with ultrapure water for 3-5 times, drying the powder in an oven at 80 ℃ for 72 hours after removing part of impurities, and sealing and preserving the dried sample in a glass bottle for later use after the sample is completely dried.
(2) And (5) deacetylating the scraped powder. The method comprises the following specific steps: sieving the pretreated cuttlebone powder in the step (1) by a 100-mesh sieve to obtain cuttlebone powder with the particle size less than or equal to 0.15mm. Preparing NaOH solution with the concentration of 3mol/L, placing cuttlebone powder after scraping the sieve into alkali solution with the concentration of 3mol/L, heating by a heating furnace after fully stirring, boiling for 1 hour, closing fire, cleaning with ultrapure water for 3-5 times after the solution is cooled, centrifuging the solution when the pH value of the solution is close to the pH value of the original powder in water, pouring out supernatant, placing the powder into an oven with the temperature of 80 ℃ for drying, judging whether the cuttlebone powder is completely dried by a weighing method, and obtaining the organic coating inorganic framework material after the cuttlebone powder is dried to constant weight, namely adsorbent 2 (CB-3).
Performance test:
cd adsorption experiments were performed with the cuttlebone raw powder (CB) prepared in comparative example 1, cuttlebone adsorbent 1 (CB-1) prepared in example 1, cuttlebone adsorbent 2 (CB-3) prepared in example 2, using the following steps: with cadmium nitrate tetrahydrate (Cd (NO) 3 ) 2 ·4H 2 O) is a Cd source, a tetrahydrate cadmium nitrate solution with the concentration of 2, 4, 8, 16, 24, 32, 40 and 60mg/L is prepared as a Cd ion stock solution, the pH value of the Cd ion stock solution is regulated to be 6.0+/-0.1, 2.4mg of cuttlebone original powder (CB), cuttlebone adsorbent 1 (CB-1) and cuttlebone adsorbent 2 (CB-3) are respectively weighed into different transparent glass bottles, 50mL of ultrapure water is added, the pH value of the solution is regulated after the adsorbent is fully mixed with the ultrapure water for 24 hours to be 8.0+/-0.1, 50mL of Cd stock solution with the pH value regulated in advance is added after the Cd reaction system reacts for 120 hours, a supernatant is taken, an aqueous phase filter membrane with the pH value of 0.45 mu m is adopted, the supernatant is diluted by a certain multiple, the concentration of the reacted solution is detected by an atomic absorption spectroscope, and the original cuttlebone material is calculated(CB), cuttlebone adsorbent 1 (CB-1) and cuttlebone adsorbent 2 (CB-3) for adsorbing Cd ions. The adsorption quantity is calculated as q t ＝(C 0 -C t ) V/m. Wherein C is 0 Represents the initial concentration of Cd, C t Represents the concentration of Cd in the solution at different times, V is the volume of the solution in the adsorption system, and m is the mass of the adsorbent applied in the adsorption system.
Obtaining the unit adsorption quantity of the cuttlebone original powder (CB), the cuttlebone adsorbent 1 (CB-1) and the cuttlebone adsorbent 2 (CB-3) to Cd according to the adsorption quantity calculation formula. The calculation results are shown in Table 1.
Table 1 CB, CB-1 and CB-3 adsorption capacity (mg/g) for Cd of different concentrations
| Initial concentration (mg/L) | 1 | 2 | 4 | 8 | 12 | 16 | 20 | 30 |
| CB | 22.7 | 57.7 | 137.1 | 297.6 | 416.6 | 457.8 | 502.3 | 547.4 |
| CB-1 | 24.2 | 63.9 | 144.4 | 301.9 | 430.6 | 498.5 | 544.5 | 594.6 |
| CB-3 | 29.9 | 67.2 | 139.3 | 304.3 | 445.6 | 537.0 | 606.1 | 635.6 |
Table 1 shows that the unit adsorption amount of cuttlebone original powder (CB) to Cd solution with concentration of 30mg/L is 547.4mg/g; the unit adsorption capacity of the adsorbent 1 (CB-1) to the Cd solution with the concentration of 30mg/L can reach 594.58mg/g, which is higher than the adsorption capacity of the original untreated CB; the unit adsorption capacity of the adsorbent 2 (CB-3) to the Cd solution with the concentration of 30mg/L can reach 635.6mg/g.
Adsorption data obtained from the adsorption experiments performed in examples 1-2 and comparative example 1 were plotted as adsorption isotherms, as shown in fig. 1. As can be seen from FIG. 1, the method has been adopted in many studies in the pastCompared with the Cd adsorbent of the prior art, the adsorption of the untreated cuttlebone raw powder (CB) on Cd is much higher than that of the prior adsorption material; the deacetylation treatment of cuttlebone material by using 3mol/L NaOH solution has better Cd adsorption effect than that of adsorbent 1. It can be seen from fig. 1 that the adsorption effect of the deacetylated organic coating inorganic frame material is significantly improved compared with that of the original powder. Furthermore, the functional groups present in the preferred adsorbent 2 (CB-3) and the original adsorbent were analyzed by Fourier transform Infrared Spectrometry (FTIR), as shown in FIG. 2: at 3643.22cm -1 It was found that modified adsorbent CB-3 produced a spike, probably-OH and NH 2 Is stretched at 2920cm -1 And 2850cm -1 The left and right parts respectively show the symmetrical and asymmetrical stretching of C-H, the bending degree between the two peaks before and after modification is changed, and the original CB is 1448cm -1 There is a distinct peak characterized by c=o, and the peak corresponding to CB-3 after modification narrows and shifts, indicating that the modification changes c=o associated with acetyl groups, possibly resulting from the removal of some of the acetyl groups in the chitin. The analysis shows that the deacetylation treatment converts the chitin in the cuttlebone into chitosan, and further shows that the modified cuttlebone organic coating inorganic framework material has good adsorption capacity on Cd.
Comparative example 2
There have been many studies on the adsorption removal of Cd in the previously published patents and published literature. For example, in the published invention patent, feng Yanfang, white ice and other materials such as sawdust hydrothermal carbon, mushroom residue biochar and the like are adopted to treat Cd-containing wastewater; in published literature, qianjun Liu, wen-Tao Tan, and Qiating Chen et al are treated with lignosulfonate-hematite, iron-manganese oxide-biochar, tiO, respectively 2 The method comprises the step of carrying out adsorption treatment on Cd-containing wastewater by taking hematite, crosslinked chitosan, chitin, corn straw biochar, hydroxyapatite/bentonite and shell powder as adsorbents. Specific adsorption amounts are shown in the following table:
TABLE 2 adsorption Effect of different adsorption materials on Cd
| Adsorbent and process for producing the same | Adsorbate | Adsorption quantity (mg/g) |
| TiO 2 | Cd | 1.1 |
| Humic acid-TiO 2 | Cd | 1.4 |
| Lignosulfonate-hematite | Cd | 39.0 |
| Iron-manganese oxide-biochar | Cd | 120.8 |
| Crosslinked chitosan | Cd | 213.3 |
| Chitin | Cd | 108.0 |
| Corn stalk biochar | Cd | 13.4 |
| Hydroxyapatite/bentonite | Cd | 98.0 |
| Shell powder | Cd | 46.4 |
| Sawdust hydrothermal carbon material | Cd | 9.6 |
| Mushroom dreg biochar | Cd | 24.1 |
| Silk quilt waste biochar | Cd | 91.1 |
| Tannic acid impregnated biochar | Cd | 65.4 |
| Cuttlebone adsorbent 1 (invention) | Cd | 594.6 |
| Cuttlebone adsorbent 2 (invention) | Cd | 635.6 |
Table 2 shows that compared with the adsorbing materials for adsorbing Cd in the prior art and literature research, the cuttlebone derivative material of the organic film inorganic frame prepared by the invention has obviously higher adsorption capacity for Cd, which proves that the organic film inorganic frame material prepared by taking cuttlebone biomass as raw material in the invention has obvious superiority for adsorbing Cd.
The adsorption amounts given in table 2 are the maximum adsorption amounts mentioned in the corresponding patents or literature.
In Table 2, tiO 2 See [1 ]]Chen Q,YinD,Zhu S,et al.Adsorptionofcadmium(II)on humic acid coated titanium dioxide[J]Journal of Colloid and Interface Science,2012,367 (1) 241-248; lignosulfonate-Hematite see [2]Liu Q,Tang J,Li X,et al.Effect of lignosulfonate on the adsorption performance of hematite for Cd(II)[J]Sci Total Environ,2020,738:139952; iron manganese oxide-biochar [3 ]]Tan W T,Zhou H,Tang S F,et al.Enhancing Cd(II)adsorption on rice straw biochar by modification of iron and manganese oxides[J]Environ ballut, 2022,300:118899; cross-linked chitosan is described in [4 ]]Tan Xuecai yellow silver, zhou Gui, et al chitosan vs Cd 2+ Adsorption Performance [ J ]]Chemical research and application, 2003 (01): 67-68; chitin is described in [5 ]]Anastopoulos I,Bhatnagar A,Bikiaris D N,et al.Chitin adsorbents for toxic metals:a review[J]Int J Mol Sci,2017,18 (1); corn stalk biochar see [6 ]]Chen F,Sun Y,Liang C,et al.Adsorption characteristics and mechanisms of Cd 2+ from aqueous solutionby biochar derived from corn stover[J]Sci Rep,2022,12 (1): 17714; hydroxyapatite/Bentonite see [7 ]]Liu Guo, xu Lisha, li Zhi et al, hydroxyapatite/bentonite composites for Cd in water 2+ Adsorption study [ J]Silicate journal 2018,46 (10): 1414-1425; shell powder is described in [8 ]]Luo Wenwen, xu Yingming, wang Nong, etc., adsorption Performance of Shell powder on Cd (II) [ J]Instructions for agricultural environment science 2017,36 (11): 2240-2247.
Sawdust hydrothermal carbon material see CN 110918057A; see CN 107362773a for lentinus edodes residue biochar; the waste biochar of silk quilt is referred to as CN 107362770A; tannic acid impregnated biochar see CN 102553539a.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The preparation method of the organic film-coated inorganic framework material is characterized by comprising the following steps of: boiling the cuttlefish bone sheath powder in strong alkali solution, and deacetylating to obtain the inorganic skeleton material.
2. The method of claim 1, wherein the strong base solution comprises sodium hydroxide solution.
3. The preparation method according to claim 1 or 2, wherein the concentration of the strong alkali solution is 1 to 3mol/L.
4. The preparation method according to claim 1 or 2, wherein the boiling time is 0.5 to 3 hours.
5. The method according to claim 1, wherein the particle size of the cuttlefish shell powder is not more than 0.15mm.
6. The organic-coated inorganic framework material prepared by the preparation method of any one of claims 1 to 5.
7. The use of the organic-coated inorganic framework material of claim 6 as an adsorbent for treating Cd ions in a contaminated water body or a contaminated soil.
8. The use according to claim 7, wherein the concentration of Cd ions in the contaminated water is 1-30 mg/L.
9. The use according to claim 7 or 8, wherein the adsorbent is added in an amount of 1.2-3.6 mg for 100mL of contaminated water.
10. The use according to claim 7 or 8, wherein the pH of the contaminated water body is between 7 and 9.
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