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Three biosorbents, crab carapace, the macroalgae Fucus vesiculosus and peat were compared with two commercial materials, an activated-carbon and an ion-exchange resin for the removal of copper from aqueous media. Kinetic models of Lagergren first-order, pseudo-second order and intraparticular diffusion were used to model the data. The process for all(More)
Digital objects are often more complex than their common perception as individual files or small sets of files. Traditional methods of preserving these complex objects such as migration may not be suitable for maintaining access to them in an economically and technically feasible way. Many of today's preservation scenarios would benefit from a change in our(More)
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