Method for removing aromatic sulfonic acid anions in aqueous solution and aromatic sulfonic acid anion CMOFs material

A technology of aromatic sulfonic acid and aromatic sulfonate, which is applied in the fields of essential oils/fragrances, chemical instruments and methods, water pollutants, etc., and can solve problems such as difficulty in natural biochemical degradation of aromatic sulfonate anions, toxicity, and influence on enzyme activity , to achieve good removal efficiency, mild response conditions, and simple characterization

Active Publication Date: 2021-03-26

BEIJING INSTITUTE OF TECHNOLOGYGY

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AI-Extracted Technical Summary

Problems solved by technology

However, aromatic sulfonate anions, as derivatives of benzene compounds, also have certain toxicity and are relatively harmful to the human body. They can cause serious eye irritation, skin and respiratory irritation, affect enzyme activity, and disrupt human physiology. metabolism

In addition, if the waste liquid containing aromatic sulfonate anions is directly discharged, the natural biochemica...

Method used

[0142] The method of the present invention utilizes additional multiple intermolecular interactions such as π-π stacking, hydrogen bonding and anion-π interactions between organic ligands to successfully introduce aromatic sulfonate anions in CMOFs as framework anions and immobilize them in the pores of CMOFs to achieve the removal of aromatic sulfonate anions in aqueous solution. The method is simple in operation, mild in conditions, applicable to aromatic sulfonate anions contain...

Abstract

The invention relates to a method for removing aromatic sulfonic acid anions in an aqueous solution and an aromatic sulfonic acid anion CMOFs material, and belongs to the field of sewage treatment. According to the method, an ATRZ aqueous solution and an inorganic metal salt aqueous solution are dropwise added into a sewage solution containing aromatic sulfonate anions, and high-crystallinity water-insoluble CMOFs crystals taking the aromatic sulfonate anions as balanced anions are formed by virtue of coordination interaction, so that the aromatic sulfonate anions in the aqueous solution are effectively removed. The method is easy to operate and mild in condition, is suitable for aromatic sulfonate anions containing different groups, and has high selectivity.

Application Domain

Water contaminantsTreatment involving filtration +3

Technology Topic

Environmental chemistryAqueous solution +7

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Examples

Experimental program(15)

Example Embodiment

[0038] Example 1

[0039] A method of removing an aromatic sulfonate anion in aqueous solution, the method steps are as follows:

[0040] (1) Pretreatment of laboratory waste liquid containing aromatic sulfonate, water containing aromatic sulfonate, chloride, chloride, bromine ions, sulfate, nitrate, and hydrogenate, nitrate, and hydrogen The sodium oxide solution, the pH = 5 to 7 of the regulatory system, and then filtered to obtain a waste liquid having a solid impurity; wherein the aromatic sulfonate is 4-methylbenzene sulfonate sodium salt (NATS);

[0041] (2) 10ml of the ATRZ (0.492 g, 3.0 mmol) solution 2 O, get an ATRZ aqueous solution, dissolve the inorganic metal copper salt (3.0 mmol) in 10 ml h 2 O, the inorganic metal salt solution is obtained; wherein the inorganic metal salt is Cu (NO) 3 ) 2;

[0042] (3) Sequentially add an ATRZ aqueous solution and inorganic metal salt solution to 5 ml of step (1), stirred at 20 ° C for 20 min, filtrate, the resulting clear liquid is allowed to stand at room temperature for 30 min, and crystal precipitation in the mother liquor, continue After standing for 3 days, the crystal precipitation is no longer in the solution, and then the solution was filtered, 5 mL washed 3 times, and the temperature was dried in vacuo to 65 ° C. CUTS), the obtained clarified solution is a solution after removal of the aromatic sulfonate anion.

[0043] The aromatic glyph is removed by 75.49%.

[0044] The crystal structural parameters of the MOF (CUTS) are shown in Table 1.

[0045] After standing for different times, the infrared spectrum of the CMOFS crystal is as figure 1 As shown, the powder XRD of the CMOFS crystal is as figure 2 As shown, it is shown that only only a fragrance of fragrant anion is present in the crystal, and there is no inorganic anion, indicating that the method has strong selectivity to aromatic sulfonic acid anion.

[0046] The coordination environment of the CMOFS crystal is like image 3 As shown, the accumulation of the CMOFS crystal is like Figure 4 Indicated.

Example Embodiment

[0047] Example 2

[0048] In this embodiment, the aromatic sulfonate is a sodium 2-iodophenylsulfonate (NAIBS), the inorganic metal salt for CUSO 4 The CMOFS crystal is MOF (Cuibs), and the rest isofable.

[0049] The aromatic sulfonate epithelion removal efficiency was 76.19%.

[0050] The crystal structural parameters of the MOF (CUIBS) are shown in Table 1.

[0051] After standing for different times, the infrared spectrum of the CMOFS crystal and the powder XRD result show that there is only a fragrance of fragrant anion, without inorganic anions, indicating that the method has strong sulfonic acid anion. Selectivity.

[0052] The coordination environment of the CMOFS crystal is like image 3 As shown, the accumulation of the CMOFS crystal is like Figure 4 Indicated.

Example Embodiment

[0053] Example 3

[0054] In this example, the aromatic sulfonate is a sodium salt (NaAbs) of 4-aminobenzenesulfonate, the inorganic metal salt for Cu (BF 4 ) 2 The CMOFS crystal is MOF (Cuabs), and the rest is the same as in Example 1.

[0055] The aromatic gulfonate epidion removal efficiency was 78.31%.

[0056] The crystal structural parameters of the MOF (Cuabs) are shown in Table 1.

[0057] After standing for different times, the infrared spectrum of the CMOFS crystal and the powder XRD result show that there is only a fragrance of fragrant anion, without inorganic anions, indicating that the method has strong sulfonic acid anion. Selectivity.

[0058] The coordination environment of the CMOFS crystal is like image 3 As shown, the accumulation of the CMOFS crystal is like Figure 4 Indicated.

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Classification and recommendation of technical efficacy words

easy to operate
mild conditions

Method for removing aromatic sulfonic acid anions in aqueous solution and aromatic sulfonic acid anion CMOFs material

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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