title: Highly selective removal of Zn(II) ion from hot-dip galvanizing pickling waste with amino-functionalized Fe3O4@SiO2 magnetic nano-adsorbent.
abstract: Amino-functionalized Fe3O4@SiO2 magnetic nano-adsorbent was used as a novel sorbent to highly selective removal of Zn(II) ion from hot-dip galvanizing pickling waste in the presence of Fe(II). These hot-dip galvanizing pickling waste mainly contain ZnCl2 and FeCl2 in aqueous HCl media. The properties of this magnetic adsorbent were examined by transmission electron microscopy (TEM), powder X-ray diffraction (XRD), infrared spectrometer (FT-IR) and BET surface area measurements. Various factors influencing the adsorption of Zn(II) ion such as initial concentration of metal ions, the amount of adsorbent, pH value of the solutions, the concentration of coexisting iron ion were investigated by batch experiments. The results indicated that the adsorption equilibrium data obeyed the Freundlich model with maximum adsorption capacities for Zn(II) to 169.5mg/g. The maximum adsorption occurred at pH 5±0.1 and Fe(II) interferences had no obvious influence. This work provides a potential and unique technique for zinc ion removal from hot-dip galvanizing pickling waste.
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, YunNan, KunMing 650500, PR China.
authors.forename: Shuangyou
authors.initials: S
authors.lastname: Bao
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, YunNan, KunMing 650500, PR China. Electronic address: luckyman@163.com.
authors.forename: Lihong
authors.initials: L
authors.lastname: Tang
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, YunNan, KunMing 650500, PR China.
authors.forename: Kai
authors.initials: K
authors.lastname: Li
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, YunNan, KunMing 650500, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Ning
authors.affiliation: Faculty of Metallurgical and Energy, Kunming University of Science and Technology, YunNan, KunMing 650500, PR China.
authors.forename: Jinhui
authors.initials: J
authors.lastname: Peng
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, YunNan, KunMing 650500, PR China.
authors.forename: Huibin
authors.initials: H
authors.lastname: Guo
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, YunNan, KunMing 650500, PR China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Zhu
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, YunNan, KunMing 650500, PR China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Liu
keywords: Adsorption zinc; Amino modification; Fe(3)O(4)/SiO(2) nanoparticles; Hot-dip galvanizing pickling waste