有序介孔碳对水体中环丙沙星抗生素的吸附性能

Adsorption Performance of Ordered Mesoporous Carbon to Ciprofloxacin Antibiotic in Water

研究了有序介孔碳(OMCs)对水体中环丙沙星抗生素的吸附性能,考察了温度、环丙沙星溶液初始浓度、环丙沙星溶液pH值等对OMCs吸附效果的影响。结果表明,升高温度有利于OMCs对环丙沙星的吸附;随着环丙沙星溶液初始浓度的増大,OMCs对环丙沙星的吸附量逐渐增加;在环丙沙星溶液pH值为6时,OMCs对环丙沙星的吸附效果最好。在25℃下,OMCs对环丙沙星的吸附在30min左右即可达到平衡;OMCs对环丙沙星的吸附过程符合Langmuir吸附等温线模型,吸附动力学符合拟二级动力学方程,25℃时的最大吸附容量为331.9mg·g-1。OMCs可以有效吸附水中的环丙沙星抗生素,且具有较好的重复使用性能,为有效去除水中的抗生素类新兴污染物提供了一种新的方法。

We studied the adsorption performance of ordered mesoporous carbon（OMCs） to ciprofloxacin in water, and studied the effects of temperature,initial concentration of ciprofloxacin solution, and pH value of cip- rofloxacin solution on the adsorption efficiency of OMCs. Results show that high temperature is benefit to the adsorption of OMCs to ciprofloxacin, the adsorption capacity of OMCs to ciprofloxacin increases with the in- crease of the initial concentration of ciprofloxacin solution, and adsorption efficiency is the best when the pH value is 6. Adsorption of OMCs to ciprofloxacin reaches equilibrium within 30 rain at 25 ℃. The adsorption process of OMCs to ciprofloxacin is in accordance with the Langmuir adsorption isotherm model, the adsorption kinetics is in accordance with the pseudo-second order kinetic equation, and the maximum adsorption capacity is 331.9 mg g-1 at 25 ℃. OMCs can effectively adsorb ciprofloxacin antibiotics in water with good repeatability, which provides a new method for effectively removing antibiotic emerging pollutants in water.