氧化石墨烯改性碳泡沫对四环素的吸附性能优化研究

The Research of Adsorption Performance Optimization of Tetracycline by Graphene Oxide Modified Carbon Foam

氧化石墨烯材料是近年来发展的一类新型高效吸附材料,氧化石墨烯具有机械强度高、比表面积大、稳定性好等优点,在吸附、萃取等领域应用广泛。四环素类抗生素是一种常见的抗生素药物,在生活用水中的残留对人体健康和环境造成了很大的威胁。本研究为了优化氧化石墨烯改性碳泡沫材料对盐酸四环素污染物的吸附性能,以碳泡沫材料为载体,使用氧化石墨烯溶液对其进行表面改性,制备了一种环保、高效的吸附剂——氧化石墨烯/碳泡沫复合材料。并通过控制污染物pH值、温度、离子强度,优化了四环素在该材料上的吸附性能。研究结果表明:在最佳条件下,即在pH为4和温度为35℃条件下,最大吸附量可达81.9%,而离子强度的改变对吸附剂的吸附性能几乎没有影响。

Graphene is a new kind of high efficient adsorption materials developed in recent years. It has many advantages such as high mechanical strength,large specific surface area and good stability. It is widely used in adsorption, extraction and many other fields. Tetracycline antibiotics are common antibiotic drugs.Their residues in domestic water pose a great threat to human health and the environment. In order to optimize the adsorption performance of graphene oxide modified carbon foam material for tetracycline hydrochloride, a new kind of environmental protection was prepared by using graphene oxide solution as the surface modification material, High efficient adsorbent-graphene oxide/carbon foam composites. The adsorption properties of tetracycline on the material were optimized by pH, temperature and ionic strength. The results show that under the optimum conditions, that is, pH 4 and temperature 35 ℃, the maximum adsorption capacity can reach 81.9 %, however, the change of ionic strength has little effect on the adsorption performance of the adsorbent.