Journal
ENVIRONMENTAL EARTH SCIENCES
Volume 67, Issue 3, Pages 637-640Publisher
SPRINGER
DOI: 10.1007/s12665-011-1509-7
Keywords
Lead; Pre-concentration; Manganese dioxide; Adsorption isotherm
Funding
- AWE Technical Outreach Programme
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A novel manganese dioxide (MnO2) resin is suitable for the determination and decontamination of lead isotopes (Pb-208, Pb-207, Pb-206) in aqueous solutions at trace concentrations. This is desirable due to the toxic nature and high abundance of lead in the environment. Current techniques are both time consuming, expensive and not suitable for low-level lead decontamination. The MnO2 resin has been demonstrated to pre-concentrate with extraction efficiency above 90% for a range of pH values, and with a mean extraction of 92.5% from fresh waters at a flow rate of 100 ml min(-1). The lead distribution coefficient is 1.3 x 10(4) (pH 7) with tolerance to calcium and sodium. Adsorption isotherms have been investigated and the resin shown to follow the Langmuir adsorption isotherm with a saturation point of 41.5 mg per g of MnO2 resin.
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