Abstract
The purposes of this study were to investigate the removal efficiency of ammonium (NH4+) ion from aqueous solution using the natural Turkish (Yi{dotless}ldi{dotless}zeli) zeolite and to characterize equilibrium isotherms. Experiments were carried out using batch method as a function of the solution pH, shaking time, dosage of adsorbent, and temperature. All these factors affected NH4+ ion removal from aqueous solution. Equilibrium modelling data were fitted to linear Langmuir and Freundlich models. Dubinin-Redushckevich (D-R) isotherm was applied to describe the nature of ion exchange of NH4+ and found that it occurred physically. Thermodynamics parameters such as change in free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) were also calculated. These parameters confirmed that ion exchange of NH4+ by the zeolite was feasible, spontaneous and exothermic in nature. Based on the results, it can be concluded that the natural Turkish (Yi{dotless}ldi{dotless}zeli) zeolite is suitable for the removal of NH4+ ions in wastewater treatments and agricultural purposes to in terms of sustainability of environmental quality.
| Original language | English |
|---|---|
| Pages (from-to) | 258-263 |
| Number of pages | 6 |
| Journal | Journal of Hazardous Materials |
| Volume | 141 |
| Issue number | 1 |
| DOIs | |
| State | Published - 6 Mar 2007 |
| Externally published | Yes |
Keywords
- Ammonium removal
- Isotherm
- Natural zeolite
- Thermodynamic parameter
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis
