Removal of Pb2+ from aqueous solutions by rock phosphate (low-grade)
| Autor: | Eda Keleş, A. Kadir Özer, Sedat Yörük |
|---|---|
| Přispěvatelé: | EBYÜ, Üzümlü Meslek Yüksekokulu |
| Rok vydání: | 2010 |
| Předmět: |
Lead removal
Aqueous solution Chromatography Chemistry Contact time viruses Mechanical Engineering General Chemical Engineering Kinetics virus diseases Langmuir adsorption model General Chemistry Activation energy symbols.namesake Heavy metal Adsorption Wastewater Phosphorite Rock phosphate symbols General Materials Science Water Science and Technology Nuclear chemistry |
| Zdroj: | Desalination. 253:124-128 |
| ISSN: | 0011-9164 |
| DOI: | 10.1016/j.desal.2009.11.021 |
| Popis: | In this study, removal of Pb 2+ from aqueous solution by adsorption on rock phosphate (low-grade) has been investigated in batch experiments. 1 The Pb 2+ adsorption capability of the rock phosphate was evaluated as a function of pH, adsorbent dosage, contact time, initial Pb 2+ concentration and temperature. Adsorption capacity of rock phosphate was found to be 200 mg Pb 2+ /g of adsorbent for initial Pb 2+ concentration of 50 mg/L at 25 °C, while the adsorbent dosage was maintained at 0.25 g/L in pH 5 and contact time 120 min. Adsorption data obtained at 25, 35, 45 and 55 °C showed that the adsorption process was well-fitted with the pseudo-first-order adsorption rate expression and Langmuir adsorption isotherm. Activation energy obtained from kinetic data was found to be 33.6 kJ mol − 1 . |
| Databáze: | OpenAIRE |
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