Adsorption Kinetics and Isotherms of Arsenic(V) from Aqueous Solution Onto Ni0.5Zn0.5Fe2O4 Nanoparticles

作者：Liu, Ruijiang; Lu, Yi; Shen, Xiangqian^*; Yang, Xinchun; Cui, Xuewen; Gao, Yingying

来源：Journal of Nanoscience and Nanotechnology, 2013, 13(4): 2835-2841.

DOI：10.1166/jnn.2013.7392

• Ni0.5Zn0.5Fe2O4
• Magnetic Nanoparticles
• Citrate-Gel
• Arsenic
• Adsorption Kinetics
• Adsorption Isotherms

Magnetic Ni0.5Zn0.5Fe2O4 nanoparticles were synthesized by the facile citrate-gel process. Their morphology, chemical composition, microstructure, and magnetic properties were investigated by XRD, TEM, EDX, BET, and VSM. The as-prepared magnetic Ni0.5Zn0.5Fe2O4 nanoparticles consisting of grains about 20 nm were characterized with specific surface area of 49.0 m(2)/g and magnetization of 46.1 A m(2)/kg. The arsenic(V) adsorption onto these magnetic Ni0.5Zn0.5Fe2O4 nanoparticles at room temperature was determined by the ICP-AES measurement of arsenic(V) in aqueous solution. The results show that the pseudo-second-order kinetic model is fitted well to describe the arsenic(V) adsorption process with a determination coefficient (R-2 = 0.9862). By comparing with the two- and three-parameter models for adsorption isotherms of arsenic(V) onto the magnetic Ni0.5Zn0.5Fe2O4 nanoparticles at room temperature, the Temkin and Redlich-Peterson model can be used to evaluate the arsenic(V) adsorption isotherm at room temperature. The arsenic(V) equilibrium adsorption quantity is up to 7.2 rng/g for these magnetic Ni0.5Zn0.5Fe2O4 nanoparticles when the initial arsenic(V) concentration is 3 mg/L in aqueous solution.

• 出版日期2013-4
• 单位江苏大学