Multi-Walled Carbon Nanotubes and Powder-Activated Carbon Adsorbents for the Removal of Nitrofurazone from Aqueous Solution

作者：Wu Ying-Ying; Xiong Zhen-Hu^*

来源：Journal of Dispersion Science and Technology, 2016, 37(5): 613-624.

DOI：10.1080/01932691.2014.981337

• Nitrofurazone
• multi-walled carbon nanotubes
• powder-activated carbon
• adsorption
• aqueous solution

Multi-walled carbon nanotubes (MWCNTs) and powder-activated carbon (PAC) were used as adsorbents for adsorption of nitrofurazone, a veterinary medicine, from aqueous solutions. The adsorbents were characterized using FTIR transform infrared spectroscopy, N-2 adsorption/desorption isotherms, and scanning electron microscopy. The effects of initial pH, contact time, and temperature on adsorption capacity of the adsorbents were investigated. For MWCNT and PAC, the result showed that when the pH value was ranged from 2.0 to 10.0, the dosage of adsorbent was 0.02 g, and adsorptive time is 4 hours, the removal efficiencies for nitrofurazone were 96.8% and 94.7%, and the corresponding maximum capacities at 283 K were close to 50.8 mgg(-1) and 59.9 mgg(-1), respectively. For nitrofurazone, the pseudo-second-order kinetic model provided the best fit to the experimental data. The Boyd model indicated the mechanism for adsorption processes was mainly external mass transfer, while the effect of particle internal diffusion was relatively weak. Liu model could best fit to the experimental data of isothermal adsorption. The data of adsorption thermodynamics showed that the adsorption process was spontaneous.

• 出版日期2016
• 单位天津城建大学