Abstract
Activated carbon derived from pine cones waste was prepared by
carbonization at 450°C, activated by different activating agents:
ZnCl 2, H 2 SO 4 and NaOH, and then
pyrolyzed at 600°C. Adsorption of Cr VI and other heavy metals (Mn
II, Fe II, Cu II) on activated carbons was investigated to evaluate the
adsorption properties. Special attention was paid to the effects of
carbon surface functionalities that were analyzed by FT-IR and zeta
potential study. Moreover, XRD study of activated carbon was also
carried out. Results had shown that activated carbon by NaOH was the
best adsorbent for removal of chromium VI from wastewater. The
solid-solution interaction was determined by analyzing the adsorption
isotherms at room temperature at different pH. When pH is above 4, the
removal fraction of Cr (VI) ions decreased with the increase of pH. The
removal fraction of Cr (VI) ions decreased below pH 4. The preferable
removal of Cu (II) over Mn(II) and Fe (II) could be due to its lower
affinity to solvent.Pseudo-second order equation provided the better
correlation for the adsorption kinetics data. Equilibrium isotherms were
determined by Fowler-Guggenheim model.
| Original language | English |
|---|---|
| Pages (from-to) | 90-99 |
| Number of pages | 10 |
| Journal | Open Engineering |
| Volume | 4 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Mar 2014 |
| Externally published | Yes |
Keywords
- Activated carbon
- Chemical treatment
- Surface properties
- wastewater treatment
- heavy metals