Influence of nano-γ- AL₂O₃ on radiolytic decomposition of phenol in water solutions

The change of ph, chemical oxygen demand (COD) and formation of CO₂ at radiolysis of water solution of phenol in presence of nano-γ-Al₂O₃ within the absorption dose range of 0-400 kGy has been studied. The existence of Nano-- Al₂O₃ does not significantly affect the decrease in COD with the growth of adsorbed dose, but causes to reduction in concentration forming carbon dioxide. ph is strongly reduced in homogeneous system. ph changes relatively low in the presence of Nano-γ- Al₂O₃.Despite the intensive researches of radiolytic decomposition of phenol in water solutions, heterogeneous radiolysis of the system has been studied insufficiently. Particularly the influence of nanoparticles on radiolytic decomposition of phenol in water solutions has been weakly studied.In the work it has been studied the change in ph indicator, chemical oxygen demand (COD) and formation of CO₂ at radiolysis of water solution of phenol in presence of nano- γ Al₂O₃ within the absorption dose range of 0-400 kGy.The kinetic curves of changes of ph of the irradiated system, including radiolysis of homogeneous system of phenol-water, systems of nano-γ Al₂O₃ with and without sample rotation. ph changes relatively low in the presence of nano-γ Al₂O₃ in the system. Apparently, part of acidic liquid products is adsorbed on the surface of nano-γ Al₂O₃ . Unexpected change in ph is observed in the case of sample rotation. In this case decrease in ph is less than above mentioned two cases. The obtained results show the additional adsorption of acids on the surface of nano-γ Al₂O₃ at rotation in centrifuge.The kinetic curves of the changes in COD of the irradiated systems, including radiolysis of homogeneous system of phenol-water, systems of nano-γ Al₂O₃ with and without sample rotation.