Tourmaline tailing geopolymer porous material and preparation method thereof

Abstract

The invention relates to a tourmaline tailing geopolymer porous material and a preparation method thereof.The preparation method comprises the steps that an alkali activator, a foaming agent and deionized water are added into tourmaline tailing powder, magnetic stirring is conducted to be uniform, geopolymer slurry is obtained, then the geopolymer slurry is moved into a rigid mold and sealed, curing is conducted in a constant-temperature container, and the tourmaline tailing geopolymer porous material is obtained. The curing temperature is 60-90 DEG C, curing to obtain a geopolymer sample, and washing to be neutral to obtain the tourmaline tailing geopolymer porous material. The tourmaline tailing geopolymer porous material prepared by the invention not only has a relatively good removal effect on polluted wastewater such as antibiotics, but also has important meanings for improving the economic value of the tourmaline tailings, widening the research and development of tourmaline functional composite materials and reducing environmental pollution.

Description

Technical Field

[0001] The present invention relates to the technical fields of functional utilization of non-metallic mine tailings and preparation of new green inorganic porous materials, and particularly relates to a tourmaline tailings geopolymers porous material and a preparation method thereof. Background Art

[0002] Tourmaline is a boron-containing complex silicate mineral with a cyclic silicate structure and physical and chemical properties such as spontaneous polarization and far-infrared emission, and has broad application prospects in the development of functional materials in the fields of environmental protection, energy conservation and life health. Patent No. CN114957935B discloses a method for preparing a new composite material by adding tourmaline to polybutylene succinate, polylactic acid and acetyl tributyl citrate. Patent No. CN 114749141 B discloses a method for preparing an environmental heavy metal pollution remediation agent by adding tourmaline or modified tourmaline to biochar, and the remediation agent has achieved good results in the adsorption of heavy metal ions in the water environment. In fact, most of the existing technologies focus on the composite of tourmaline minerals with organic or inorganic components to develop different types of tourmaline mineral functional composite materials, ignoring the actual technical problem that some tourmaline minerals in tourmaline tailings powder have not been fully utilized due to the limitations of ore dressing and deep processing technologies. In addition, the chemical composition and physical and chemical properties of tourmaline tailings powder are very close to natural non-metallic minerals, which is a kind of aluminosilicate mineral resource. Therefore, using tourmaline tailings powder as a substitute raw material to prepare high-value functional materials is of great significance for broadening the research and development of tourmaline functional composite materials, promoting the efficient utilization of resources and reducing environmental pollution.

[0003] Geopolymer is a green and environmentally friendly inorganic cementitious material with a three-dimensional network structure formed by alternately sharing oxygen atoms in silicon-oxygen and aluminum-oxygen tetrahedral structural units. Due to its rich surface functional groups and special internal network structure, geopolymers exhibit a large specific surface area, rich active sites and pore characteristics with a wide pore size distribution, and have excellent pollutant adsorption performance. There is currently no precedent for preparing geopolymers porous materials using tourmaline tailings. The preparation method of the present invention successfully activates the tourmaline properties in the waste tourmaline tailings. Its products not only maintain the performance advantages of porous materials, but also achieve the complementarity and synergy between tourmaline functions and porous material properties. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the technical problem to be solved by the present invention is to provide a tourmaline tailings geopolymers porous material, a preparation method and an application thereof. For the first time, a tourmaline mineral functional porous material is prepared without adding tourmaline, which can not only achieve the complementarity and synergy between tourmaline functions and porous material properties, but also has the characteristics of wide raw material sources, low cost, simple process and easy popularization and application.

[0005] To achieve the above object, the technical solution provided by the present invention is as follows:

[0006] In a first aspect, the present invention provides a preparation method of a tourmaline tailings geopolymers porous material. The process of the preparation method is as follows: An alkali activator, a foaming agent, and deionized water are added to tourmaline tailings powder, and magnetically stirred evenly to obtain a geopolymer slurry, which is then transferred to a rigid mold and sealed, and cured in a constant temperature container at a curing temperature of 60-90 °C. After curing, a geopolymer sample is obtained and washed to neutrality to obtain the tourmaline tailings geopolymers porous material.

[0007] The alkali activator is obtained by adding solid sodium hydroxide to sodium silicate according to n(SiO 2 ) / n(Na 2 O)=1.0-1.3 to lower the modulus to 1.0-1.4;

[0008] The molar ratio of the alkali activator to tourmaline tailings is n(Na 2 O) / n(Al 2 O 3 ) = 0.7-1.0;

[0009] The molar ratio of deionized water to the alkali activator is n(H 2 O) / n(Na 2 O)=6-12;

[0010] The percentage content of SiO 2 in the tourmaline tailings powder is 40-60 wt%, and the percentage content of Al 2 O 3 is 10-30 wt%; the content of ferro-tourmaline in the tourmaline tailings powder is 5-20 wt%;

[0011] The added mass of the foaming agent is 3-7% of the tourmaline tailings powder.

[0012] Further, the curing process is: demolding and curing at 25±1 °C for 28 days.

[0013] Further, the foaming agent is made by mixing oleic acid, cetyltrimethylammonium bromide and deionized water. At this time, no deionized water is added when mixing with the tourmaline tailings powder, so that the molar ratio of deionized water to the alkali activator in the system is n(H 2 O) / n(Na 2 O)=6-12; or made by mixing sodium dodecyl sulfate (SDS) and H 2 O 2 with a mass fraction of 30%. At this time, additional deionized water is added when mixing with the tourmaline tailings powder, so that the molar ratio of deionized water to the alkali activator in the system is n(H2 O) / n(Na 2 O) = 6 - 12.

[0014] Further: In the foaming agent, the mass ratio of cetyltrimethylammonium bromide to the anionic surfactant oleic acid is 5 - 10%.

[0015] Further: The moisture content of the tourmaline tailings powder is less than 10%, and the particle size range is 5 - 50 μm; the mass of the tourmaline tailings powder is 5 - 50 g.

[0016] Further: The rotation speed of magnetic stirring is 800 - 1200 r / min, and the stirring time is 5 - 20 min.

[0017] The present invention also protects a tourmaline tailings geopolmer porous material obtained by the above preparation method, and the particle size of the tourmaline tailings geopolmer porous material is 50 - 500 μm.

[0018] In the third aspect, the present invention provides an application of the porous material, and the porous material is used to remove tetracycline hydrochloride. The specific process is as follows: In 100 mL of a tetracycline hydrochloride solution with a concentration of 10 mg / L, add the porous material, and the concentration of the porous material is 1.0 g / L. Keep it oscillating at a constant temperature of 25°C for 480 min, and the removal rate of tetracycline hydrochloride is not less than 80%.

[0019] Further, the removal rate of tetracycline hydrochloride is not less than 90%.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) On the basis of not adding tourmaline, the present invention prepares a tourmaline mineral functional composite material, and the preparation process is simple, environmentally friendly, low in cost, and has good economic benefits.

[0022] (2) The present invention uses tourmaline tailings to prepare a geopolmer porous material. Through reasonable setting of each material, it not only maintains the performance advantages of the porous material, but also realizes the complementarity and synergy between the tourmaline function and the performance of the porous material, and stimulates the tourmaline attributes in the tourmaline tailings.

[0023] (3) The selected tourmaline tailings in the present invention contain some unselected tourmaline minerals. Due to the spontaneous polarization of tourmaline, a surface electric field is generated, which affects the migration of hydrated ions during the synthesis process of the tourmaline tailings geopolmer porous material, making the distribution of the geopolmer gel more uniform. This is beneficial to providing a larger contact area and more adsorption sites for the adsorption of pollutants.

[0024] (4) The tourmaline contained in the tourmaline tailings geopolmer porous material can have an electrostatic interaction with tetracycline hydrochloride due to the electrostatic field generated by its spontaneous polarization property. In addition, the hydrated hydroxyl ions generated by the electrolysis of tourmaline in water are prone to complexation reactions with tetracycline hydrochloride, thereby further enhancing the adsorption performance of the geopolmer porous material. Description of the Drawings

[0025] Figure 1 This is the XRD pattern of the tourmaline tailings, which are the raw materials selected for the present invention.

[0026] Figure 2 This is the scanning electron microscope image of the tourmaline tailings geopolmer porous material prepared in Example 1 of the present invention.

[0027] Figure 3 This is the adsorption performance of the tourmaline tailings geopolmer porous materials prepared in Examples 1 to 6 of the present invention for tetracycline hydrochloride. Detailed Embodiments

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments and drawings of the present invention, but this is not intended to limit the scope of protection of the claims of this application.

[0029] The composition of the tourmaline tailings used in the following examples and comparative examples is shown in Table 1:

[0030] Table 1 Composition of the tourmaline tailings used in Example 1 (wt.%)

[0031]

[0032] The XRD pattern of the tourmaline tailings, which are the raw materials selected for the present invention, can be seen in Figure 1 . The main phases in the tourmaline tailings are quartz, ferro-tourmaline, albite, microcline, and clinochlore. The moisture content of the tourmaline tailings powder is less than 10%, and the particle size range is 5 - 50 μm; the content of ferro-tourmaline in the tourmaline tailings powder is 11 wt%.

[0033] Example 1

[0034] (a) Preparation of the alkali activator: Add 2.96 g of solid sodium hydroxide to 10 g of water glass, stir magnetically at 500 r / min for 10 min to prepare the alkali activator, and seal it for later use;

[0035] (b) Preparation of the foaming agent: Mix 4.96 g of deionized water, 3 g of the anionic surfactant oleic acid, and 0.24 g of cetyltrimethylammonium bromide, stir magnetically at 600 r / min for 15 min at 35 °C to prepare the foaming agent, and seal it for later use.

[0036] (c) Forming and curing: Add 6.93 g of the alkali activator prepared in step (a) and 1.03 g of the foaming agent prepared in step (b) to 20 g of tourmaline tailings powder, stir magnetically at 1000 r / min for 15 min to obtain a geopolymer slurry, transfer it into a rigid mold, seal it with plastic wrap, cure it in a constant temperature container at 80 °C for 72 h, then demold and cure it at 25 ± 1 °C for 28 days to obtain a geopolymer sample;

[0037] (d) Alkali washing: Add the geopolymer sample prepared in step (c) to deionized water, stir magnetically at 500 r / min for 1 h until neutral, perform vacuum filtration after the reaction ends, then place the filter residue in an oven at 80 °C to dry, and grind it to obtain the tourmaline tailings geopolymer porous material.

[0038] Using the tourmaline tailings geopolymer porous material prepared in this example, a removal experiment was carried out on the tetracycline hydrochloride solution. The specific process is as follows: Add the porous material to 100 mL of a tetracycline hydrochloride solution with a concentration of 10 mg / L. The concentration of the porous material is 1.0 g / L, and keep it oscillating at a constant temperature of 25 °C for 480 min. The removal rate of tetracycline hydrochloride reaches 95.89%.

[0039] Example 2

[0040] (a) Preparation of alkali activator: Add 2.49 g of solid sodium hydroxide to 10 g of water glass, stir magnetically at 500 r / min for 10 min to prepare an alkali activator, and seal it for later use;

[0041] (b) Preparation of foaming agent: Mix 4.96 g of deionized water, 3 g of anionic surfactant oleic acid and 0.24 g of cetyltrimethylammonium bromide, stir magnetically at 600 r / min for 15 min at 35 °C to prepare a foaming agent, and seal it for later use.

[0042] (c) Forming and curing: Add 7.62 g of the alkali activator prepared in step (a) and 1.03 g of the foaming agent prepared in step (b) to 20 g of tourmaline tailings powder, stir magnetically at 1000 r / min for 15 min to obtain a geopolymer slurry, transfer it into a rigid mold, seal it with plastic wrap, cure it in a constant temperature container at 80 °C for 72 h, then demold and cure it at 25 ± 1 °C for 28 days to obtain a geopolymer sample;

[0043] (d) Alkali washing: Add the geopolymer sample prepared in step (c) to deionized water, stir magnetically at 500 r / min for 1 h until neutral, perform vacuum filtration after the reaction ends, then place the filter residue in an oven at 80 °C to dry, and grind it to obtain the tourmaline tailings geopolymer porous material.

[0044] For the tourmaline tailings geopolmer porous material prepared in this example, a removal experiment was carried out on the tetracycline hydrochloride solution, and the removal rate of tetracycline hydrochloride reached 90.26%.

[0045] Example 3

[0046] (a) Preparation of the alkali activator: Add 2.96 g of solid sodium hydroxide to 10 g of water glass, stir magnetically at 500 r / min for 10 min to prepare the alkali activator, and seal it for later use;

[0047] (b) Preparation of the foaming agent: Mix 4.96 g of deionized water, 3 g of the anionic surfactant oleic acid, and 0.16 g of cetyltrimethylammonium bromide, stir magnetically at 600 r / min for 15 min at 35 °C to prepare the foaming agent, and seal it for later use.

[0048] (c) Molding and curing: Add 6.93 g of the alkali activator prepared in step (a) and 1.03 g of the foaming agent prepared in step (b) to 20 g of tourmaline tailings powder, stir magnetically at 1000 r / min for 15 min to obtain the geopolmer slurry, transfer it into a rigid mold, seal it with plastic wrap, cure it in a constant temperature container at 80 °C for 72 h, and then demold and cure it at 25 ± 1 °C for 28 days to obtain the geopolmer sample;

[0049] (d) Alkali washing: Add the geopolmer sample prepared in step (c) to deionized water, stir magnetically at 500 r / min for 1 h until it is washed to neutral, perform vacuum filtration after the reaction ends, then place the filter residue in an oven at 80 °C to dry, and grind it to obtain the tourmaline tailings geopolmer porous material.

[0050] For the tourmaline tailings geopolmer porous material prepared in this example, a removal experiment was carried out on the tetracycline hydrochloride solution, and the removal rate of tetracycline hydrochloride reached 91.57%.

[0051] Example 4

[0052] (a) Preparation of the alkali activator: Add 2.96 g of solid sodium hydroxide to 10 g of water glass, stir magnetically at 500 r / min for 10 min to prepare the alkali activator, and seal it for later use;

[0053] (b) Preparation of the foaming agent: Mix 4.96 g of deionized water, 3 g of the anionic surfactant oleic acid, and 0.24 g of cetyltrimethylammonium bromide, stir magnetically at 600 r / min for 15 min at 35 °C to prepare the foaming agent, and seal it for later use.

[0054] (c) Forming and curing: Add 6.93 g of the alkali activator prepared in step (a) and 0.87 g of the foaming agent prepared in step (b) to 20 g of tourmaline tailings powder, stir magnetically at 1000 r / min for 15 min to obtain a geopolymer slurry, transfer it into a rigid mold, seal it with plastic wrap, cure it in a constant-temperature container at 80 °C for 72 h, then demold and cure it at 25 ± 1 °C for 28 days to obtain a geopolymer sample;

[0055] (d) Alkali washing: Add the geopolymer sample prepared in step (c) to deionized water, stir magnetically at 500 r / min for 1 h until neutral, perform vacuum filtration after the reaction ends, then place the filter residue in an oven at 80 °C to dry, and grind it to obtain a porous tourmaline tailings geopolymer material.

[0056] Using the porous tourmaline tailings geopolymer material prepared in this example, a removal experiment was carried out on the tetracycline hydrochloride solution, and the removal rate of tetracycline hydrochloride reached 93.67%.

[0057] Example 5

[0058] (a) Preparation of the alkali activator: Add 2.25 g of solid sodium hydroxide to 10 g of water glass, stir magnetically at 500 r / min for 10 min to prepare an alkali activator, and seal it for standby;

[0059] (b) Preparation of the foaming agent: Mix 3.91 g of deionized water, 2.75 g of the anionic surfactant oleic acid, and 0.24 g of cetyltrimethylammonium bromide, stir magnetically at 600 r / min for 15 min at 35 °C to prepare a foaming agent, and seal it for standby.

[0060] (c) Forming and curing: Add 8.94 g of the alkali activator prepared in step (a) and 1.03 g of the foaming agent prepared in step (b) to 20 g of tourmaline tailings powder, stir magnetically at 1000 r / min for 15 min to obtain a geopolymer slurry, transfer it into a rigid mold, seal it with plastic wrap, cure it in a constant-temperature container at 80 °C for 72 h, then demold and cure it at 25 ± 1 °C for 28 days to obtain a geopolymer sample;

[0061] (d) Alkali washing: Add the geopolymer sample prepared in step (c) to deionized water, stir magnetically at 500 r / min for 1 h until neutral, perform vacuum filtration after the reaction ends, then place the filter residue in an oven at 80 °C to dry, and grind it to obtain a porous tourmaline tailings geopolymer material.

[0062] Using the porous tourmaline tailings geopolymer material prepared in this example, a removal experiment was carried out on the tetracycline hydrochloride solution, and the removal rate of tetracycline hydrochloride reached 92.69%.

[0063] Example 6

[0064] (a) Preparation of the alkali activator: Add 2.25 g of solid sodium hydroxide to 10 g of water glass, stir magnetically at 500 r / min for 10 min to prepare the alkali activator, and seal it for later use;

[0065] (b) Preparation of the foaming agent: Mix 3.91 g of deionized water, 3 g of anionic surfactant oleic acid and 0.16 g of cetyltrimethylammonium bromide, stir magnetically at 600 r / min for 15 min at 35 °C to prepare the foaming agent, and seal it for later use.

[0066] (c) Molding and curing: Add 8.94 g of the alkali activator prepared in step (a) and 1.03 g of the foaming agent prepared in step (b) to 20 g of tourmaline tailings powder, stir magnetically at 1000 r / min for 15 min to obtain a geopolymer slurry, transfer it into a rigid mold, seal it with plastic wrap, cure it in a constant temperature container at 80 °C for 72 h, and then demold and cure it at 25 ± 1 °C for 28 days to obtain a geopolymer sample;

[0067] (d) Alkali washing: Add the geopolymer sample prepared in step (c) to deionized water, stir magnetically at 500 r / min for 1 h until it is washed to neutral, perform vacuum filtration after the reaction ends, then place the filter residue in an oven at 80 °C to dry, and grind it to obtain a porous tourmaline tailings geopolymer material.

[0068] Using the porous tourmaline tailings geopolymer material prepared in this example, an experiment on the removal of tetracycline hydrochloride solution was carried out, and the removal rate of tetracycline hydrochloride reached 91.73%.

[0069] Example 7

[0070] (a) Preparation of the alkali activator: Add 2.96 g of solid sodium hydroxide to 10 g of water glass, stir magnetically at 500 r / min for 10 min to prepare the alkali activator, and seal it for later use;

[0071] (b) Preparation of the foaming agent: Mix 5.17 g of sodium dodecyl sulfate (SDS) and 1.83 g of H with a mass fraction of 30% 2 O 2 Mix them, stir magnetically at 1200 r / min for 15 min to prepare the foaming agent, and seal it for later use.

[0072] (c) Forming and curing: Add 4.96 g of deionized water, 6.93 g of the alkali activator prepared in step (a), and 1.03 g of the foaming agent prepared in step (b) to 20 g of tourmaline tailings powder, stir magnetically at 1000 r / min for 15 min to obtain a geopolymer slurry, transfer it into a rigid mold, seal it with plastic wrap, cure it in a constant temperature container at 80 °C for 72 h, then demold and cure it at 25 ± 1 °C for 28 days to obtain a geopolymer sample;

[0073] (d) Alkali washing: Crush and grind the geopolymer sample prepared in step (c), add it to deionized water, stir magnetically at 500 r / min for 1 h, after the reaction, filter it under vacuum and wash it several times with water until neutral, then place the filter residue in an oven at 80 °C to dry, and grind it to obtain a porous tourmaline tailings geopolymer material.

[0074] Perform a removal experiment on the tetracycline hydrochloride solution: Weigh the porous material at 1.0 g / L, add it to 100 mL of a tetracycline hydrochloride solution with a concentration of 10 mg / L, and oscillate it at a constant temperature of 25 °C for 480 min. The removal rate of tetracycline hydrochloride reaches 83.37%.

[0075] Comparative Example 1

[0076] Each step of this comparative example is the same as that of Example 1, except that in this comparative example, 20 g of iron tailings powder is used instead of 20 g of tourmaline tailings powder to obtain a porous iron tailings geopolymer material.

[0077] Under the same conditions, through the removal experiment test on the tetracycline hydrochloride solution, the test result is: The removal rate of tetracycline hydrochloride reaches 61.76%.

[0078] Comparative Example 2

[0079] Each step of this comparative example is the same as that of Example 1, except that in this comparative example, 18.6 g of iron tailings powder and 1.4 g of tourmaline powder are mixed to replace 20 g of tourmaline tailings powder to obtain a porous geopolymer material.

[0080] Under the same conditions, through the removal experiment test on the tetracycline hydrochloride solution, the test result is: The removal rate of tetracycline hydrochloride reaches 76.23%.

[0081] Comparative Example 3

[0082] Each step of this comparative example is the same as that of Example 1, except that in this comparative example, 18.6 g of iron tailings powder and 1.4 g of tourmaline powder are mixed to replace 20 g of tourmaline tailings powder, and the addition amount of the foaming agent is 0.87 g, and the addition amount of the alkali activator is 6.93 g to obtain a porous geopolymer material.

[0083] Under the same conditions, the removal experiment of the tetracycline hydrochloride solution was tested, and the test result was that the removal rate of tetracycline hydrochloride reached 73.28%.

[0084] Through a large number of experimental practices, the present invention can prepare a tourmaline mineral functional composite material without adding tourmaline, and the preparation process is simple and environmentally friendly. In the tourmaline tailing geopolmer porous material prepared by the present invention, the tourmaline contained affects the migration of hydrated ions during the synthesis process of the material due to its spontaneous polarization characteristics, making the distribution of the geopolymer gel more uniform, which is beneficial to providing a larger contact area and more adsorption sites for the adsorption of pollutants. In addition, the electrostatic field generated by the spontaneous polarization characteristics of tourmaline can have an electrostatic interaction with tetracycline hydrochloride, and the hydrated hydroxyl ions generated by the electrolysis of tourmaline water are easily complexed with tetracycline hydrochloride, thereby further improving the adsorption performance of the geopolmer porous material.

[0085] In the present invention, the tourmaline introduced in the form of tourmaline tailings, under the alkali activation system, the substances act synergistically to significantly improve the adsorption effect of the final porous material on tetracycline hydrochloride, and the performance is better than that of the porous material directly synthesized from pure iron tailings and tourmaline powder.

[0086] Matters not described in the present invention are applicable to the prior art.

Claims

1. A method for preparing a tourmaline tailings geopolymer porous material, characterized in that: The preparation method comprises the following steps: adding an alkali activator, a foaming agent and deionized water to tourmaline tailings powder, stirring the mixture evenly with a magnetic force to obtain a geopolymer slurry, then transferring the mixture into a rigid mold and sealing the mold, and curing the mixture in a constant temperature container at a curing temperature of 60 to 90° C., curing the mixture to obtain a geopolymer sample, and washing the sample to neutrality to obtain the tourmaline tailings geopolymer porous material. The alkaline activator is obtained by adding solid sodium hydroxide to water glass and reducing the mold to 1.0 to 1.4 according to n(SiO2) / n(Na2O)=1.0 to 1.3; The molar ratio of the alkaline activator to the tourmaline tailings is n(Na2O) / n(Al2O3)=0.7-1.0; The molar ratio of deionized water and alkaline activator is n(H2O) / n(Na2O)=6-12; The percentage of SiO2 in the tourmaline tailings powder is 40-60wt%, the percentage of Al2O3 is 10-30wt%; the content of iron tourmaline in the tourmaline tailings powder is 5-20wt%; The added mass of the foaming agent is 3-7% of the tourmaline tailings powder.

2. The preparation method according to claim 1, characterized in that: The curing process is as follows: demoulding and curing at 25±1°C for 28 days.

3. The preparation method according to claim 1, characterized in that: The foaming agent is prepared by mixing oleic acid, hexadecyltrimethylammonium bromide and deionized water, and no deionized water is added when mixing with tourmaline tailings powder, so that the molar ratio of deionized water and alkali activator in the system is n(H2O) / n(Na2O)=6-12; or it is prepared by mixing sodium dodecyl sulfate (SDS) and H2O2 with a mass fraction of 30%, and additional deionized water is added when mixing with tourmaline tailings powder, so that the molar ratio of deionized water and alkali activator in the system is n(H2O) / n(Na2O)=6-12.

4. The preparation method according to claim 1, characterized in that: In the foaming agent, the mass ratio of hexadecyltrimethylammonium bromide to the anionic surfactant oleic acid is 5-10%.

5. The method for preparing the tourmaline tailings geopolymer porous material according to claim 1, characterized in that: The water content of the tourmaline tailings powder is less than 10%, and the particle size range is 5 to 50 μm; the mass of the tourmaline tailings powder is 5 to 50 g.

6. The method for preparing the tourmaline tailings geopolymer porous material according to claim 1, characterized in that: The speed of magnetic stirring is 800-1200 r / min, and the stirring time is 5-20 min.

7. A tourmaline tailings geopolymer porous material obtained by the preparation method according to any one of claims 1 to 6, characterized in that: The particle size of the tourmaline tailings geopolymer porous material is 50-500 μm.

8. Use of the porous material according to claim 7, characterized in that: The porous material is used to remove tetracycline hydrochloride. The specific process is: 100 mL of a tetracycline hydrochloride solution with a concentration of 10 mg / L is added with the porous material, the concentration of the porous material is 1.0 g / L, constant temperature oscillation is performed at 25° C. for 480 minutes, and the removal rate of tetracycline hydrochloride is not less than 80%.

9. The use according to claim 8, characterized in that: The removal rate of tetracycline hydrochloride is not less than 90%.

10. A method for preparing tourmaline tailings geopolymer porous material, characterized in that: The preparation method comprises the following steps: adding an alkali activator and a foaming agent to tourmaline tailings powder, stirring the mixture evenly with magnetic force to obtain a geopolymer slurry, then transferring the mixture into a rigid mold and sealing the mixture, and curing the mixture in a constant temperature container at a curing temperature of 60 to 90° C., curing the mixture to obtain a geopolymer sample, and washing the sample to neutrality to obtain the tourmaline tailings geopolymer porous material; and the foaming agent is prepared by mixing oleic acid, hexadecyltrimethylammonium bromide and deionized water.

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