Preparation of novel magnetic graphene oxide and its adsorption properties for Cd2+
LU Yi-fei1, WANG Li1,2, LI Yu-qi1, QIN Liu-ping1, YU Yang1
1. School of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; 2. Research Center of Green Control and Restoration Technology for Environmental Pollution, Wuhan University of Science and Technology, Wuhan 430081, China
Abstract: 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, 王黎, 李钰琦, 覃刘平, 余杨. 新型磁性氧化石墨烯的制备及其对Cd2+的吸附性能[J]. 现代化工, 2020, 40(5): 137-142.
LU Yi-fei, WANG Li, LI Yu-qi, QIN Liu-ping, YU Yang. Preparation of novel magnetic graphene oxide and its adsorption properties for Cd2+. Modern Chemical Industry, 2020, 40(5): 137-142.
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