Method for removing ciprofloxacin in water body through bamboo charcoal adsorption

[0027] Example 1: The influence of the amount of adsorbent on the adsorption effect

[0028] Weigh 0.005, 0.0100, 0.0200, 0.0500, 0.1000, 0.2000, 0.5000 g (0.0005g) different amounts of bamboo charcoal particles into a 50 ml glass bottle, add 25 mL of a solution with a concentration of 25 mg / L ciprofloxacin, the solution Contains 0.01 mol / L CaC1 2 And 0.01 mol / L NaN 3 (0.01 mol / L CaC1 2 :The solution is supporting electrolyte, 0.01 mol / L NaN 3 : To inhibit bacterial activity in the soil).

[0029] Vibrate at 25 ℃, 220 r / min and avoid light for 12 h. Samples were taken. After the supernatant was passed through a 0.22 μm filter membrane, the content of ciprofloxacin in the sample was determined by liquid chromatography, and the removal rate was calculated. Best dosage, such as figure 1 As shown, when the adsorbent input is 0.005~0.0500 g, the adsorption removal rate of ciprofloxacin increases with the increase of the adsorbent. When the adsorbent input is 0.1 g, the The re

[0030] Example 2: The influence of pH on the adsorption effect

[0031] Accurately weigh 0.1 g of bamboo charcoal (accurate to ±0.0005 g) into a 50 mL glass bottle, and take 25 mg / l ciprofloxacin solution (0.01 mol / L CaC1 2 , 0.01 mol / L NaN 3 ), adjust the pH of the solution to 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5 with HCl and NaOH, add 25 mL of solutions with different pH values, and shake at 25 ℃, 220 r / min, and avoid light. After h, after passing through a 0.22 μm filter membrane, the concentration of ciprofloxacin in the sample was measured and the adsorption amount of ciprofloxacin was calculated. Such as figure 2 As shown, when the pH value of the water body is between 2.5 and 4.5, the saturated adsorption capacity of bamboo charcoal for ciprofloxacin is relatively low, when the pH=5.5, the saturated adsorption capacity of bamboo charcoal for ciprofloxacin is the largest, which is 6148.32 mg / kg, when the pH value of the water body is greater than 5.5, the saturat

[0032] Example 3: Influence of adsorption time on adsorption effect

[0033] Accurately weigh 0.1 g of bamboo charcoal (accurate to 0.0005 g) into a 50 mL glass bottle, adjust the pH of the background solution to 5.5, add 25 mL, 25 mg / l ciprofloxacin and 0.01 mol / L CaC1 2 Solution (0.01 mol / L CaC1 2 :The solution is a supporting electrolyte with NaN added 3 Make the concentration 0.01 mol / L,), oscillate at 25 ℃, 220 r / min for 48 h, at 0, 1 / 6, 1 / 3, 0.5, 1, 1.5, 2, 4, 6, 8, 10 , 12, 16, 24, 36, 48 h, take the supernatant, after passing through a 0.22 μm filter membrane, use liquid chromatography to determine the concentration of ciprofloxacin in the sample, calculate the adsorption amount of ciprofloxacin, determine the ciprofloxacin The best time for the adsorption of floxacin on bamboo charcoal. Such as image 3 As shown, when the adsorption time is within 0.5 h, the adsorption of bamboo charcoal to ciprofloxacin is very rapid, the concentration of ciprofloxacin in t