|
| << vorige |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 18 van 18 gevonden artikelen
| Titel: |
Use of zeolite for cadmium removal from wastewater |
| Auteur: |
Panayotova, M. |
| Verschenen in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering |
| Paginering: | Jaargang 35 (2000) nr. 9 pagina's 1591-1601 |
| Jaar: |
2000-10 |
| Inhoud: |
Kinetics and thermodynamics of uptake of Cd2+ (in concentration of 10 and 50 mg/dm3) by natural and modified zeolite have been investigated. Kinetic data obtained are best described by the kinetic equation for the second order irreversible reactions and the equilibrium data obtained best fit to Freundlich adsorption isotherm. It has been found that (a) the ratio of wastewater to zeolite equal to 0.1 dm3: 1 g was the optimum, (b) use of zeolite with particles' size <0.09 μm increased Cd2+ uptake, (c) Cd2+ removal due to zeolite's uptake was the highest if the pH value of water to be treated was in the range of pH 5-7, (d) uptake of Cd2+ was considerably decreased in presence of Ca2+ and Mg2+ in concentrations 2 folds the concentration of Cd2+, (e) zeolite treated with NaCl and CH3COONa showed the highest uptake ability, (f) concentrations lower than 0.5 and 8-10 mg/dm3 can be achieved by one stage treatment of soft water when the initial Cd2+ concentrations are 10 and 50 mg/dm3 correspondingly, and (g) contacting with 2 mol/dm3 NaCl solution can easily regenerate loaded zeolite. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 18 van 18 gevonden artikelen
| << vorige |