Proposal for an ecofriendly and economic strategy for efficient radioiodination of coumarin derivatives

Combination of the calculation of reactivity descriptors and the cold iodine test for some coumarin derivatives was used in order to optimize the radioiodination reaction. The strongly nucleophilic predicted coumarins were subjected to the action of cold iodine. With two coumarins substituted at 3 by the 2-hydroxybenzoyl group, iodination did not occur but a product of intramolecular heterocyclization was obtained. This strategy is useful for economic and environmentally friendly radioiodination.publishe

Electro-Activation of Granular Carbon from Olive Mill Solid Residue

A technique for activation of granualr activated carbon (GAC) is presented based on the electrochemical method. In this study, we investigated the effectiveness of the electroactivated GAC in removing phenol from water and determine the optimum conditions for activation. Electroactivation on the GAC appears to be an interesting technique, it requires a short eletro-activation time T=30 min and an optimum potential ranging from +200 mV/SCE to 400 mV/SCE. Phenol adsorption isotherms gave a limiting adsorption capacity Qm dependent on the applied potential, which at potential E=+300 mV/SCE was improved by about 55 %, giving Qm=75 mg phenol g-1 GAC