Preparation of MGO Modified SBC Composites and Their Adsorption Properties for TC in Water
Magnetic graphene oxide(MGO)was used to modify the adsorption sites of sludge biochar(SBC)as the carri-er,and the prepared composite material realized the effective combination of adsorption and magnetic separation.The mor-phology and microstructure of the composites were characterized by FTIR,XRD,SEM,VSM and BET.A certain con-centration of tetracycline solution was prepared as a simulated antibiotic wastewater.The adsorption performance of the composite to tetracycline solution was investigated by examining the influence of factors such as calcination temperature of SBC,mass ratio of MGO and SBC,dosage of the composite material,adsorption temperature,pH of the solution,initial concentration of tetracycline solution and adsorption time.The results show that when the monomer of SBC800 is selected,m(MGO)∶m(SBC800)=1∶2,the magnetic GO modified sludge biochar composite has a good adsorption effect on tetracycline.When the dosage is 1 g/L,the initial concentration is 30 mg/L,pH is 6,and the temperature is 45 ℃,the adsorption effect is 24 h,it can achieve 97.38％removal rate and 29.213 mg/g adsorption capacity.The fitting results of adsorption kinetics,adsorption isotherm and adsorption thermodynamics model show that the adsorption process belongs to single molecular layer chemisorption and spontaneous endothermic reaction.
magnetic graphene oxidesludge biochartetracyclineadsorption
万方数据
维普
