Abstract
In the present work, modification of phosphate dolomite was conducted and applied for some bivalent metal ions removal. Physico-chemical properties of sorbent were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential-thermal analysis (DTA), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and low temperature adsorption-desorption of nitrogen. Sorption properties of modified dolomite for Zn2+, Fe2+, Cu2+, Pb2+, Cd2+, Ni2+ and Co2+ removal were studied using model solutions. The highest removal efficiency was observed in pH range from 2 to 5. Among all tested metals, highest adsorption capacity of phosphated dolomite was detected towards Co2+ and Pb2+ (15 and 12 mmol g-1, respectively) and the lowest towards Zn2+, Fe2+ and Cu2+ (about 8 mmol g-1). Adsorption isotherms were built for each tested metal ions and were fitted to Langmuir, Freundlich and Redlich-Peterson models.
| Original language | English |
|---|---|
| Pages (from-to) | 981-987 |
| Number of pages | 7 |
| Journal | Journal of Environmental Chemical Engineering |
| Volume | 2 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jun 2014 |
| Externally published | Yes |
Keywords
- Adsorption
- Isotherms
- Metal ions
- Phosphate dolomite
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Waste Management and Disposal
- Pollution
- Process Chemistry and Technology