A kind of adsorbent for absorbing bisphenol A in water and its preparation method and application
An adsorbent and water-absorbing technology, applied in the direction of adsorbing water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of high concentration, threat to human and other biological health, etc., and achieve simple operation and reliable synthesis process The effect of control and novel structure
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Embodiment 1
[0016] Sorbent synthesis
[0017] (1) Add 50mL of anhydrous toluene and 8.0g of activated silica gel to the three-neck flask, and mix 30mL of anhydrous toluene, 7.5mL of hexadecyltrimethoxysilane and 1.5mL of 3-mercaptopropyltrimethoxysilane The solution was added dropwise into a three-neck flask, under the protection of nitrogen, the reaction was carried out with magnetic stirring at 120°C for 24 hours. After the reaction was completed, it was washed with anhydrous toluene, methanol, water and methanol in sequence, and dried at 60°C to obtain a white solid powder Intermediate 1 ;
[0018] (2) Add 9mL of 1-vinylimidazole, 4.0g of intermediate product 1, 0.09g of azobisisobutyronitrile and 50mL of dry acetonitrile into a three-necked flask, and stir the reaction at 70°C for 6h under the protection of nitrogen. The product was washed successively with acetonitrile and diethyl ether, and then dried at 60°C to obtain the target product, light yellow solid powder adsorbent.
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Embodiment 2
[0021] Adsorption selectivity of the adsorbent
[0022] Under the conditions of initial adsorbate concentration of 50 μg / mL, volume of 50 mL, amount of adsorbent added of 30 mg, controlled temperature of 30 °C, shaking speed of 160 r / min, and shaking for 6 h, the adsorbent hardly adsorbed 3-aminophenol, and had little effect on 2 The adsorption amounts of -nitrophenol, 3-nitrophenol and 4-nitrophenol were 8.1 mg / g, 2.4 mg / g and 3.9 mg / g, respectively. Under the same conditions, the adsorption capacity of bisphenol A is 38.7 mg / g, which shows that the synthesized adsorbent can selectively adsorb bisphenol A.
Embodiment 3
[0024] Adsorption Kinetics of Adsorbent
[0025] Add 30mg of adsorbent to 50mL of bisphenol A solution with an initial concentration of 40μg / mL, control the temperature at 30°C, and shake at a speed of 160r / min. The results are shown in figure 2 . The adsorbent has a fast adsorption rate, and the bisphenol A adsorption capacity reaches 25.9 mg / g in 10 minutes, and reaches equilibrium in 60 minutes.
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