Characterization of Tagaran natural clay and its efficiency for removal of cadmium (II) from Sulaymaniyah industrial zone sewage
| Autor: | Bakhtyar K. Aziz, Stephan Kaufhold, Dler M. Salh Shwan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Langmuir
Aqueous solution Chemistry Health Toxicology and Mutagenesis Inorganic chemistry General Medicine 010501 environmental sciences engineering.material 01 natural sciences Pollution Endothermic process chemistry.chemical_compound Adsorption engineering Environmental Chemistry Freundlich equation Saponite Clay minerals Chlorite 0105 earth and related environmental sciences |
| Zdroj: | Environmental Science and Pollution Research. 27:38384-38396 |
| ISSN: | 1614-7499 0944-1344 |
| Popis: | The fine fraction of the Tagaran natural clay (TC) from the Kurdistan region of Iraq-Sulaimani was characterized and used to remove Cd ions from industrial swage. Using XRF, XRD, SEM, and FTIR, the dominant clay mineral of the Tagaran clay mineral was identified as saponite, with minor amounts of chlorite. The clay was examined for its efficiency to adsorb and remove (Cd2+) in the presence of other heavy metal contaminants from Sulaimani industrial zone sewage by a batch method. The effect of initial pH, equilibrium time, temperature, clay dosage, and Cd2+ concentration was studied. Results were evaluated using Langmuir, Freundlich, Temkin, and Redlich-Peterson isotherms. The kinetics could be best fitted to pseudo-second-order reaction kinetic model. In addition, the activation energy and the amount of calculated and experimentally determined heavy metal loads were consistent. The thermodynamic studies showed spontaneous endothermic adsorption. The trioctahedral smectite (saponite) showed a good efficiency for the adsorption of Cd2+ from the real sample (up to 100%) which at least partly can be explained by cation exchange. Tagaran clay is a candidate material for the production of an adsorber material for removing Cd2+ from aqueous solutions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink