Copper-containing adsorbent as well as preparation method and application of copper-containing adsorbent in adsorbing tetracycline in water
An adsorbent, tetracycline technology, applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problem of limited adsorption capacity, and achieve the effect of high selectivity, mild operating conditions and large adsorption capacity
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Embodiment 1
[0027] Preparation of adsorbent: weigh 0.22g Cu(NO 3 ) 2 · 3H 2 O was placed in a 100 mL beaker, 30.0 mL of deionized water was added, 0.5 g of SBA-15 was added under stirring, and 20% ammonia solution was slowly added dropwise. When the pH value of the mixed solution reached 6.5, the dropwise addition of ammonia water was stopped. Stirring was continued for 30 min. The above mixture was transferred into a crystallization kettle, and subjected to a hydrothermal reaction in an oven at 100°C for 3.0 hours, and the crystallization kettle was taken out, and the contents in the kettle were filtered, washed, and dried to obtain a copper-loaded adsorbent.
[0028] Application: Take 100mL of tetracycline aqueous solution with a concentration of 70mg / L and put it into a 250mL glass container, add 0.01g of adsorbent, stir at room temperature for 12.0 h, measure the concentration of residual tetracycline with an ultraviolet spectrophotometer, and the equilibrium of adsorbent to tetracy...
Embodiment 2
[0030] Preparation of adsorbent: weigh 0.22g Cu(NO 3 ) 2 · 3H 2 O was placed in a 100 mL beaker, 30.0 mL of deionized water was added, 0.5 g of SBA-15 was added under stirring, and 20% aqueous ammonia solution was slowly added dropwise. When the pH value of the mixed solution reached 5.5, the addition of ammonia water was stopped. Stirring was continued for 30 min. Transfer the above mixture into a crystallization kettle, heat in an oven at 100°C for 3.0 h, take out the crystallization kettle, filter, wash and dry the solid matter in the kettle to obtain a copper-loaded adsorbent.
[0031] Application: Take 100mL of tetracycline aqueous solution with a concentration of 70mg / L and put it into a 250mL glass container, add 0.01g of adsorbent, stir at room temperature for 12.0 h, measure the concentration of residual tetracycline with an ultraviolet spectrophotometer, and the equilibrium of adsorbent to tetracycline The adsorption capacity was 394 mg / g adsorbent.
Embodiment 3
[0033] Preparation of the adsorbent: only changing Cu(NO 3 ) 2 · 3H 2 O is 0.11g, and other processes are with embodiment 1.
[0034] Application: Take 100mL of tetracycline aqueous solution with a concentration of 70mg / L and put it into a 250mL glass container, add 0.01g of adsorbent, stir at room temperature for 12.0 h, measure the concentration of residual tetracycline with a UV spectrophotometer, and the adsorbent has an equilibrium adsorption of tetracycline The amount was 325 mg / g sorbent.
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