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- W2157923194 abstract "The desorption characteristics of copper on biomass of a marine macroalga, Sargassum baccularia, immobilized in polyvinyl alcohol (PVA) gel beads, were investigated using HCl eluting solutions. Both the extent and the rate of desorption were affected by the pH of the eluent. Nearly 91% of the copper initially adsorbed was released back into an HCl solution at pH 1.0 after 40 min of contact time when apparent desorption equilibrium was achieved. When the pH was raised to 2.0, about 81% of the bound copper was desorbed within 120 min of contact time. Apparent desorption rate constants were determined using first-order desorption models. Very high concentrations of copper in the eluate could be obtained by using small amounts of the HCl eluent. However, this was achieved at the expense of the desorption efficiency. The PVA-immobilized seaweed biomass beads could be regenerated with HCl solution at pH 1.0 or 2.0 in multiple cycles of copper biosorption-desorption. Following desorption at pH 1.0 in the first cycle, about 55% of the biosorption capacity of the virgin biomass could be reused in subsequent cycles; in the case of desorption at pH 2.0, about 67% of the original uptake capacity was reusable." @default.
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- W2157923194 date "2001-11-01" @default.
- W2157923194 modified "2023-09-26" @default.
- W2157923194 title "Desorption of Copper from Polyvinyl Alcohol-Immobilized Seaweed Biomass" @default.
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- W2157923194 doi "https://doi.org/10.1002/1521-3846(200111)21:4<295::aid-abio295>3.0.co;2-f" @default.
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