Abstract
Toxic arsenic occurs in drinking water from natural and/or anthropogenic sources. It causes health problems worldwide. Among the existing arsenic removal techniques adsorption is the commonly used one. γ -Fe2 O 3 nanoparticles were found recently to be a good adsorbent for arsenate because of its relatively high adsorption capacity and simple separation of the particles from the treated water. The aim of the study was to investigate the arsenate adsorption mechanism on the crystal γ -Fe 2 O3 nanoparticles. Adsorption experiments were carried out with three different kinds of maghemite nanoparticles: (i) homemade one with mechanochemical method; (ii) homemade one with sol-gel process; and (iii) a commercially available one. The adsorption process was monitored by characterizing with Fourier transform infrared, x-ray photoelectron spectroscopy, x-ray diffraction, transmission electron microscopy, and zeta potential analyzer. No crystal and amorphous precipitation were found on the iron oxide surfaces. The inner-sphere complex formation was found to be the predominant mechanism of adsorption. © 2010 ASCE.
| Original language | English |
|---|---|
| Pages (from-to) | 897-905 |
| Journal | Journal of Environmental Engineering |
| Volume | 136 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sept 2010 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].Research Keywords
- Adsorption
- Adsorption mechanism
- Arsenate
- Arsenic
- Drinking water
- Inner-sphere complex
- Maghemite
- Nanoparticle
- Nanotechnology
- Particles
- Water pollution
