Abstract
Bottom ash and de-oiled soya have been evaluated as potential adsorbents for the removal of a water soluble azo dye. The characterization of the adsorbents has been performed using infrared spectroscopy and differential thermal analysis. A batch of adsorption method has been adopted for studying the effects of pH, adsorbate concentration, and particle size on the adsorption process. The experimental data were tested using Langmuir, Freundlich, Tempkin, and Dubinin-Radushkevich isotherms and their parameter constants were determined. The thermodynamics showed that the process is spontaneous and exothermic. The kinetic studies revealed that the adsorption process follows first-order kinetics. A fixed-bed adsorption experiment resulted in 89% and 94% saturation of bottom ash and de-oiled soya, respectively, indicating that both adsorbents can be potentially economical.
| Original language | English |
|---|---|
| Pages (from-to) | 1813-1823 |
| Number of pages | 11 |
| Journal | Toxicological and Environmental Chemistry |
| Volume | 92 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2010 |
| Externally published | Yes |
Keywords
- Adsorption
- Bottom ash
- De-oiled soya
- Eriochrome black T
- Isotherms
- Kinetics
ASJC Scopus subject areas
- Environmental Chemistry
- Pollution
- Health, Toxicology and Mutagenesis