通过对改良Hummers法制备的氧化石墨烯（GO）进行磁性负载得到一种磁性氧化石墨烯（MGO），并通过β-环糊精改性制备了一种功能化磁性氧化石墨烯（MGO/CD），研究了MGO/CD对水体中Cd²⁺的吸附性能。通过形貌表征可以看出，GO被成功磁性负载，并接枝上了β-环糊精；磁强振动仪测试表明，MGO/CD的饱和磁化强度达到67.55 emu/g，吸附材料的磁性能良好。吸附实验表明，在温度为303 K，吸附量随着pH的升高而增大，最高可达到193.8 mg/g，吸附过程符合Langmuir等温吸附模型与准二级动力学模型。外加磁场分离并重复利用5次，MGO/CD的吸附率依然稳定在93%以上，是一种对Cd²⁺吸附性能优良的吸附剂。

A kind of magnetic graphene oxide (MGO) is obtained by magnetic loading with graphene oxide (GO) that is prepared by the modified Hummers method,and then modified by β-cyclodextrin to obtain a kind of functional magnetic graphene oxide (MGO/CD).The absorption property of MGO/CD to Cd²⁺ in wastewater is studied.Morphological characterization shows that GO is successfully magnetic-loaded,and grafted with β-cyclodextrin.Magnetomer characterization shows that the saturation magnetization of MGO/CD reaches 67.55 emu·g^-1,which proves that MGO/CD has a high magnetic performance.The adsorption experiments show that the adsorption capacity of MGO/CD increases with the rising pH values at 303 K,and reaches the maximum adsorption capacity 193.68 mg·g^-1 at pH=8.The adsorption process well accords with Langmuir isotherm adsorption model and pseudo-second-order kinetics model.Desorption experiments by magnetic separation indicate that the adsorption rate of MGO/CD remains above 93% after it has been employed for 5 cycles.MGO/CD is an adsorbent with excellent adsorption properties for Cd²⁺.

鲁逸飞(1994-),男,硕士研究生,研究方向为水处理技术,luizfly@sina.com