Indexed by:
期刊论文
First Author:
Zhang, Honglei
Correspondence Author:
Li, XC (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, R&D Ctr Membrane Sci & Technol, Sch Chem Engn, Dalian 116024, Peoples R China.
Co-author:
Li, Xiangcun,He, Gaohong,Zhan, Jingjing,Liu, Dan
Date of Publication:
2013-11-27
Journal:
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
52
Issue:
47
Page Number:
16902-16910
ISSN No.:
0888-5885
Abstract:
Magnetic microspheres with an Fe3O4 core and a SiO2-TiO2 hybrid shell were prepared by a surfactant-assisted aerosol process and subsequent etching treatment. The core-shell spheres with robust and chemically stable Ti-O-Si shells exhibit excellent adsorption performance toward basic dyes. The maximum adsorption capacities were obtained at 147 mg/g for methylene blue (MB) and 124.6 mg/g for basic fuchsin. MB with an initial concentration of 20 mg/L can be completely removed in 5 min at a dosage of 0.5 mg/L, and the equilibrium time is 90 min in the MB concentration range 20-250 mg/L. The adsorption kinetics follows the pseudo-second-order model. Furthermore, the dye saturated microspheres can be easily recycled by an external magnetic field and regenerated using 1-3 wt % NaOH aqueous solution. After six recycle runs, 98% of the adsorption capacity was still retained. The low-cost magnetic hollow spheres with good adsorption capacity are a promising candidate for water treatment.
Translation or Not:
no
