AI Article Synopsis
- Flowerlike α-Fe(2)O(3) nanostructures were created using a simple, eco-friendly microwave-assisted method, making use of inexpensive chemicals.
- These nanostructures have a high surface area with many hydroxyl groups, which enhance their ability to adsorb pollutants.
- They effectively removed arsenic (As(V)) and chromium (Cr(VI)) from water, with maximum capacities of 51 mg/g for As(V) and 30 mg/g for Cr(VI), through ion exchange mechanisms.
Article Abstract
Flowerlike α-Fe(2)O(3) nanostructures were synthesized via a template-free microwave-assisted solvothermal method. All chemicals used were low-cost compounds and environmentally benign. These flowerlike α-Fe(2)O(3) nanostructures had high surface area and abundant hydroxyl on their surface. When tested as an adsorbent for arsenic and chromium removal, the flowerlike α-Fe(2)O(3) nanostructures showed excellent adsorption properties. The adsorption mechanism for As(V) and Cr(VI) onto flowerlike α-Fe(2)O(3) 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 α-Fe(2)O(3) nanostructures are an attractive adsorbent for the removal of As(V) and Cr(VI) from water.
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| http://dx.doi.org/10.1021/la300097y | DOI Listing |
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