Studies on the Effect pH on the Sorption of Pb(II) and Cu(II) ions from Aqueous Media by Nipa Palm (Nypa fruticans Wurmb)

Studies on the Effect pH on the Sorption of Pb(II) and Cu(II) ions from Aqueous Media by Nipa Palm (Nypa fruticans Wurmb)

The effect of pH on the sorption of Pb2+ and Cu2+ ion onto Nypa fruticans Wurmb biomass was investigated. Initial pH value of 2, 5, 7, 9, and 12 were used for this study with varying initial concentrations of metal ions. The experimental results were analyzed in terms of Langmuir, Freundlich and Flo...

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Veröffentlicht in:Journal of Applied Sciences and Environmental Management 2010-06, Vol.12 (4)
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description The effect of pH on the sorption of Pb2+ and Cu2+ ion onto Nypa fruticans Wurmb biomass was investigated. Initial pH value of 2, 5, 7, 9, and 12 were used for this study with varying initial concentrations of metal ions. The experimental results were analyzed in terms of Langmuir, Freundlich and Flory-Huggins isotherms. The data showed that the maximum pH (pHmax) for the efficient sorption of Pb2+ and Cu2+ is 5.0. Evaluation using the Langmuir equation gave the monolayer sorption capacity as 91.0mg/g for Pb2+ and about 61.0mg/g for Cu2+. The sorption of Pb2+ and Cu2+ ion is pH dependent and the data showed that Nypa fruticans wurmb biomass is a successful biosorbent for treating heavy metal contaminated wastewater. The thermodynamic assessment of the metal ions on Nypa fruticans wurmb gave negative ÄG0 values, which confirms the feasibility of the process and the spontaneous nature of the sorption
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