Comparative equilibrium studies of sorption of Pb(II) ions by sodium andcalcium alginate |
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Authors: | KHOTIMCHENKO Maxim KOVALEV Valeri KHOTIMCHENKO Yuri |
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Affiliation: | 1. Department of pharmacy, Vladivostok State Medical University, Vladivostok 690990, Russia 2. Laboratory of Pharmacology, Institute of Marine Biology, Far East Branch of Russian Academy of Sciences, Vladivostok 690041, Russia 3. Laboratory of Pharmacology, Institute of Marine Biology, Far East Branch of Russian Academy of Sciences, Vladivostok 690041, Russia;Department of pharmacy, Vladivostok State Medical University, Vladivostok 690990, Russia |
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Abstract: | The absorption of Pb(II) ions from aqueous solution by different alginate compounds was studied in a batch sorption system. Water soluble sodium alginate and insoluble calcium alginate beads were investigated. The lead-binding capacity of both alginate compounds was highest within the pH range 6-8. The binding capacities and rates of Pb(II) ions by alginate compounds were evaluated. The Langmuir, Freundlich and Bruneaur, Emmet and Teller (BET) sorption models were applied to describe the isotherms and isotherm constants. Sorption isothermal data could be well interpreted by the Langmuir model. The results obtained through the study suggest that alginate compounds are favorable sorbents. The largest amount of Pb(II) ions were bound by sodium alginate although the difference between two compounds was slight. Therefore, alginate substances may be considered as alternative for sorption and removal of Pb(II) ions from wastewaters. |
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Keywords: | heavy metal lead equilibrium study alginate wastewater |
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