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- W2094356095 abstract "Fe3O4 is a promising material for arsenic sequestration due to its specific affinity toward arsenic and feasible magnetic separation. How to further increase its adsorption capacity while maintain its low-field separation is an interesting but challenging task. In this study nano-Fe3O4 was successfully coated onto the outer surface of polystyrene (PS) beads of 350–400 nm in diameter by the hetero-coacervation method, and the resulting composite PS-Fe3O4 was characterized using transmission electron microscope (TEM), X-ray powder diffraction (XRD), and electrophoresis measurement (EM). Its adsorption toward arsenate was investigated as a function of solution pH, arsenic concentration, contact time, and coexisting anions. The maximum adsorption capacity of PS-Fe3O4 was 139.3 mg/g Fe3O4, 77.7% greater than that of bulky Fe3O4. More attractively, it can be readily separated from water under a low magnetic field (<0.035 T). Continuous adsorption-desorption cyclic results demonstrated that arsenate-loaded PS-Fe3O4 can be effectively regenerated by NaOH solution, and the regenerated composite beads could be employed for repeated use without significant capacity loss, indicating that nano-Fe3O4 was steadily coated onto the surface of PS beads. Generally, PS beads could be employed as a promising host to fabricate efficient composites originated from Fe3O4 or other nanoparticles for environmental remediation." @default.
- W2094356095 created "2016-06-24" @default.
- W2094356095 creator A5016035856 @default.
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- W2094356095 date "2012-12-01" @default.
- W2094356095 modified "2023-09-26" @default.
- W2094356095 title "Spherical polystyrene-supported nano-Fe3O4 of high capacity and low-field separation for arsenate removal from water" @default.
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- W2094356095 doi "https://doi.org/10.1016/j.jhazmat.2012.10.036" @default.
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