Defluoridation of wastewater using powdered activated carbon developed fromEichhornia crassipesstem: optimization by response surface methodology
| Autor: | Sumit H. Dhawane, Gopinath Halder, Kankana Sinha |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Powdered activated carbon treatment
Materials science Carbonization Environmental engineering Ocean Engineering Sorption Pollution Matrix (chemical analysis) chemistry.chemical_compound Adsorption chemistry Wastewater Response surface methodology Fluoride Water Science and Technology Nuclear chemistry |
| Zdroj: | Desalination and Water Treatment. 56:953-966 |
| ISSN: | 1944-3986 1944-3994 |
| DOI: | 10.1080/19443994.2014.942375 |
| Popis: | The present investigation describes the removal of fluoride from synthetically fluoridated water using powdered activated carbon (PAC) developed through steam activation of carbonized Eichhornia crassipes stem by series of batch sorption experiments. Process is optimized by response surface methodology and experimental matrix is developed by central composite rotatable design. Influence of five different parameters viz. pH, adsorbent dose, temperature, contact time, and revolutions per minute (RPM) were studied in the range of 2–12, 2–12 g/L, 20–60°C, 20–180 min, and 100–300, respectively. Prepared PAC was characterized to obtain physical properties and instrumentally analyzed to observe surface texture of raw PAC and spent PAC with fluoride using methods viz. SEM, EDAX, and XRD. Physical properties, such as surface area and total pore volume, obtained equal to 97.68 m2/g and 0.5185 cm3/g, respectively. From the performed experiments for fixed initial concentration of 10 mg/L, maximum fluoride rem... |
| Databáze: | OpenAIRE |
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