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Details van artikel 9 van 14 gevonden artikelen
| Titel: |
Removal of Cu(II) from aqueous solution by adsorption on Chinese Quaternary loess: Kinetics and equilibrium studies |
| Auteur: |
Tang, Xiao W. Li, Zhen Z. Chen, Yun M. Wang, Yan |
| Verschenen in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering |
| Paginering: | Jaargang 43 (2008) nr. 7 pagina's 779-791 |
| Jaar: |
2008-06 |
| Inhoud: |
This paper dealt with the characteristics of Cu(II) adsorption on Chinese Quaternary loess. The Cu(II) adsorption isotherm and kinetics fit the Langmuir model and pseudo-second order kinetics well, respectively, with a predicted adsorption capacity of 109 mg g-1. The adsorption is ion exchange adsorption due to D-R model. Factors that are positively correlated with the adsorption capacity of loess include equilibrating time, pH, temperature, and solid-solution ratio. The adsorption of Cu(II) on loess involves 2-3 sequential diffusing steps into the micropores, and an endothermic and spontaneous process with predicted enthalpy, entropy, and Gibb's free energy changes of 7.64 kJ mol-1, 81.21 J mol-1K-1 and -14.94-17.37 kJ mol-1, respectively. Moreover, the applicability of loess on industrial wastewater treatment was investigated and satisfactorily proved. Finally, FT-IR spectra shows the precipitation of copper carbonate and the complexation of Cu(II) with clay minerals at pH > 5.0 and pH > 2.67, respectively. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 9 van 14 gevonden artikelen
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