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
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Embodiment 1
[0039] A method for removing aromatic sulfonate anions in an aqueous solution, the method steps are as follows:
[0040] (1) Pretreatment of laboratory waste liquid containing aromatic sulfonate anions: add nitric acid and hydrogen dropwise to chemical waste liquid containing aromatic sulfonate anions, chloride ions, bromide ions, sulfate radicals, nitrate radicals and perchlorate radicals Sodium oxide solution, adjust the pH of the system to 5-7, and then filter to obtain a clear waste liquid without solid impurities; wherein, the aromatic sulfonate is 4-methylbenzenesulfonic acid sodium salt (NaTS);
[0041] (2) ATRZ (0.492g, 3.0mmol) solution 10mL of H 2 O, to obtain ATRZ aqueous solution, the inorganic metal copper salt (3.0mmol) was dissolved in 10mL of H 2 In O, obtain inorganic metal salt solution; Wherein, described inorganic metal salt is Cu(NO 3 ) 2 ;
[0042] (3) Add ATRZ aqueous solution and inorganic metal salt solution sequentially to 5 mL of the waste liquid...
Embodiment 2
[0048] In this embodiment, the aromatic sulfonate is sodium 2-iodobenzenesulfonate (NaIBS), and the inorganic metal salt is CuSO 4 , the CMOFs crystal is MOF (CuIBS), and the rest are the same as in Example 1.
[0049] The removal efficiency of aromatic sulfonate anions is 76.19%.
[0050] The crystal structure parameters of the MOF (CuIBS) are shown in Table 1.
[0051] After standing for different times, the infrared spectrum results and powder XRD results of the CMOFs crystals showed that there were only sulphonate anions in the crystals, but no inorganic anions, indicating that the method had a strong effect on aromatic sulfonate anions. selectivity.
[0052] The coordination environment diagram of the CMOFs crystal is as follows image 3 As shown, the packing diagram of the CMOFs crystal is as follows Figure 4 shown.
Embodiment 3
[0054] In the present embodiment, the aromatic sulfonate is 4-aminobenzenesulfonic acid sodium salt (NaABS), and the inorganic metal salt is Cu(BF 4 ) 2 , the CMOFs crystal is MOF (CuABS), and the rest are the same as in Example 1.
[0055] The removal efficiency of aromatic sulfonate anions is 78.31%.
[0056] The crystal structure parameters of the MOF (CuABS) are shown in Table 1.
[0057] After standing for different times, the infrared spectrum results and powder XRD results of the CMOFs crystals showed that there were only sulphonate anions in the crystals, but no inorganic anions, indicating that the method had a strong effect on aromatic sulfonate anions. selectivity.
[0058] The coordination environment diagram of the CMOFs crystal is as follows image 3 As shown, the packing diagram of the CMOFs crystal is as follows Figure 4 shown.
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