Sorption of Pb(ll) by poly(hydroxamic acid) grafted oil palm empty fruit bunch
| Autor: | Wan Md Zin Wan Yunus, Anuar Kassim, Nor Azowa Ibrahim, S. M. Talebi, M. Tiansin, Md. Jelas Haron |
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| Rok vydání: | 2011 |
| Předmět: |
Environmental Engineering
Aqueous solution Enthalpy Kinetics Langmuir adsorption model Sorption Arecaceae Hydrogen-Ion Concentration Hydroxamic Acids Waste Disposal Fluid Gibbs free energy Water Purification chemistry.chemical_compound symbols.namesake chemistry Lead Fruit Hydroxylammonium chloride symbols Organic chemistry Thermodynamics Fiber Water Pollutants Chemical Water Science and Technology Nuclear chemistry |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 63(8) |
| ISSN: | 0273-1223 |
| Popis: | This paper describes the sorption of Pb(II) from aqueous solution. Oil palm empty fruit bunch (OPEFB) fiber was first grafted with poly(methylacrylate) and then treated with hydroxylammonium chloride in alkaline medium to produce hydroxamic acid (PHA) grafted OPEFB. Sorption of Pb(II) by PHA-OPEFB was maximum at pH 5. The sorption followed the Langmuir model with maximum capacityof 125.0 mg g−1 at 25°C. The sorption process was exothermic, as shown by the negative value of enthalpy change, ΔH0. The free energy change (ΔG0) for the sorption was negative, showing that the sorption process was spontaneous. A kinetic study showed that the Pb(II) sorption followed a second order kinetic model. |
| Databáze: | OpenAIRE |
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