Adsorption of vanadium ion in solution on nano zero-valent irons [纳米零价铁对水溶液中钒离子的吸附性能]

作者：Zhao C.; Yang X.; Fan M.; Hu W.; Xia Q.^*

来源：Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering, 2018, 18(6): 1253-1260.

DOI：10.12034/j.issn.1009-606X.217434

• Adsorption
• Kinetics
• Nano zero-valent iron
• Selective catalytic reduction catalyst
• Vanadium

Nano zero-valent iron (nZVI) was synthesized by the liquid-phase reduction method, and characterized by powder X-ray diffraction (PXRD), scanning electron microscope (SEM), transmission electron microscope (TEM), the Brunauer-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS) method. The adsorption performance of vanadium (V) on nZVI was investigated by rationally adjusting the parameters, such as additive amount of nZVI, initial concentration of vanadium(V) and initial pH value. Additionally, the adsorption isotherms and kinetic curves of vanadium(V) on nZVI were measured. The results showed that nZVI exhibited a regular core-shell structure with an average particle size of 10~30 nm and the BET surface area of 53 m 2 /g. Furthermore, the adsorption capacity of vanadium(V) decreased with the increase in initial pH value and nZVI amount added, respectively. The maximum vanadium(V) adsorption capacity reached 227.8 mg/g at 25℃. The adsorption isotherms of vanadium(V) on nZVI fitted well with Langmuir model, and the adsorption kinetics of vanadium(V) on nZVI could be well described by a pseudo-second-order kinetic model. The nZVI synthesized in this work will provide an useful insights into the comprehensive utilization of waste SCR denitration catalyst.

• 单位
  华南理工大学