Journal
LANGMUIR
Volume 28, Issue 9, Pages 4573-4579Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la300097y
Keywords
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Funding
- National Basic Research Program of China [2009CB930400, 2011CB933700]
- National Natural Science Foundation of China (NSFC) [21121063]
- Chinese Academy of Sciences
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) [GJHZ1224]
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Flowerlike alpha-Fe2O3 nanostructures were synthesized via a template-free microwave-assisted solvothermal method. All chemicals used were low-cost compounds and environmentally benign. These flowerlike alpha-Fe2O3 nanostructures had high surface area and abundant hydroxyl on their surface. When tested as an adsorbent for arsenic and chromium removal, the flowerlike alpha-Fe2O3 nanostructures showed excellent adsorption properties. The adsorption mechanism for As-V and Cr-VI onto flowerlike alpha-Fe2O3 nanostructures was elucidated by X-ray photoelectron spectroscopy and synchrotron-based X-ray absorption near edge structure analysis. The results suggested that ion exchange between surface hydroxyl groups and As-V or Cr-VI species was accounted for by the adsorption. With maximum capacities of 51 and 30 mg g(-1) for As-V and Cr-VI, respectively, these low-cost flowerlike alpha-Fe2O3 nanostructures are an attractive adsorbent for the removal of As-V and Cr-VI from water.
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