title: Sea-urchin-like iron oxide nanostructures for water treatment.
abstract: To obtain adsorbents with high capacities for removing heavy metals and organic pollutants capable of quick magnetic separation, we fabricated unique sea-urchin-like magnetic iron oxide (mixed γ-Fe2O3/Fe3O4 phase) nanostructures (called u-MFN) with large surface areas (94.1m(2) g(-1)) and strong magnetic properties (57.9 emu g(-1)) using a simple growth process and investigated their potential applications in water treatment. The u-MFN had excellent removal capabilities for the heavy metals As(V) (39.6 mg g(-1)) and Cr(VI) (35.0 mg g(-1)) and the organic pollutant Congo red (109.2 mg g(-1)). The u-MFN also displays excellent adsorption of Congo red after recycling. Because of its high adsorption capacity, fast adsorption rate, and quick magnetic separation from treated water, the u-MFN developed in the present study is expected to be an efficient magnetic adsorbent for heavy metals and organic pollutants in aqueous solutions.
authors.affiliation: Division of Materials Science, Korea Basic Science Institute, Daejeon 305-333, Republic of Korea. Electronic address: leeho@kbsi.re.kr.
authors.forename: Hyun Uk
authors.initials: HU
authors.lastname: Lee
authors.forename: Soon Chang
authors.initials: SC
authors.lastname: Lee
authors.forename: Young-Chul
authors.initials: YC
authors.lastname: Lee
authors.forename: Stane
authors.initials: S
authors.lastname: Vrtnik
authors.forename: Changsoo
authors.initials: C
authors.lastname: Kim
authors.forename: Sanggap
authors.initials: S
authors.lastname: Lee
authors.forename: Young Boo
authors.initials: YB
authors.lastname: Lee
authors.forename: Bora
authors.initials: B
authors.lastname: Nam
authors.forename: Jae Won
authors.initials: JW
authors.lastname: Lee
authors.forename: So Young
authors.initials: SY
authors.lastname: Park
authors.forename: Sang Moon
authors.initials: SM
authors.lastname: Lee
authors.forename: Jouhahn
authors.initials: J
authors.lastname: Lee
mesh_terms: D018360:Crystallography, X-Ray; D005290:Ferric Compounds / Q000737:chemistry*; D019216:Metals, Heavy / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures; D009930:Organic Chemicals / Q000302:isolation & purification*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification
chemical_list: D005290:Ferric Compounds; D019216:Metals, Heavy; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; C000499:ferric oxide
keywords: Metal oxide; Nanorod; Nanostructure; Synthesis