Isotherms, Kinetics and Break through Curve for Sorptive Removal of Chromium from Wastewater by Activated Sludge
| Autor: | Sunil Jayant Kulkarni |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
021110 strategic
defence & security studies Kinetics technology industry and agriculture 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology General Chemistry 010501 environmental sciences 01 natural sciences Chromium Activated sludge chemistry Wastewater Environmental chemistry 0105 earth and related environmental sciences |
| Zdroj: | Asian Journal of Chemistry. 31:1704-1708 |
| ISSN: | 0975-427X 0970-7077 |
| DOI: | 10.14233/ajchem.2019.22013 |
| Popis: | In the present investigations, activated sludge is used for removal of chromium in batch and continuous mode. It was observed that the sorption process followed Langmuir isotherm better than Freundlich isotherm (R2 = 0.95). The Freudlich model with R2 value above 0.9 suggests that the sorptive removal may involve physical and chemical adsorption with some multilayer sorption. Chromium uptake followed second order kinetics. The maximum adsorption capacity qe was observed to be 208.33 mg/g. The breakeven time and exhaustion time were determined for continuous operation. The non-availability of adsorbate at low flow rates play important role in delaying the break point time. Sludge age and initial concentration also affect the removal of chromium. The data follows the Thomas model with R2 value more than 0.9. |
| Databáze: | OpenAIRE |
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