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Oxidative degradation of used ion exchange resins (IER) by the Fenton process is an attractive alternative to their deposition as hazardous waste. The process is leading to the dissolution of the polymer beads producing low molecular weight carboxylic acids and subsequently to their mineralization. Therefore, process development is focused for economic reasons at a fast dissolution of the polymer...
A heterogeneous photocatalyst has been obtained by hosting the 2,4,6-triphenylpyrylium cation inside the supercages of Y-zeolite. Preparation of the new material has been achieved by means of a formal ion exchange in aqueous medium. Nevertheless, the mechanism is more complex, as bulky 2,4,6-triphenylpyrylium cation is unable to diffuse through the channels of Y-zeolite. The following steps are involved:...
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