Page 51 - חוברת תזות הנדסה ירוקה 2023

Development of an electron-exchange column for pharmaceutic waste treatment
Noy Cohen1; Noyshwartz10@gmail.com
Prof. Ariela Burg1, Dr. Dror Shamir2 1Sami Shamoon College of Engineering 2Nuclear Research Center Negev
Most sewage contains toxic compounds that can endanger human health and cause damage to the environment. Therefore, wastewater treatment is crucial, and many studies are being done to develop and improve existing technology for reducing pollutants in wastewater. There are many methods for reducing organic pollutants in wastewater, including oxidation processes, such AOP )advanced oxidation processing(. The objective of this study is to research and develop the redox reactions that occur in an electron-exchange matrix, in which copper and nickel ions are trapped. Since our innovative method is still under development, various parameters are not clearly known yet. The procedure presented in this research was done by means of the entrapment of redox reagents in sol-gel matrices--divalent nickel and divalent copper. The procedure is cyclical and includes four main stages. During the present research, different parameters were examined in regard to their impact on the procedure: stirring duration; pH value during the matrix preparation procedure; pH value of the substrate and its influence on the reaction and on the oxidation reduction cycles. The oxidation of two substrates were studied--Methyl orange and PCA. Our results indicate that compounds with a big molar mass, such as methyl orange, cannot be treated, because the methyl orange is trapped in the matrix and does not come out. The results of the PCA system indicated that the silicon skeleton fulfills two important roles--one as a porous matrix that hosts the redox species and the second as an oxidant species involved in the redox process. Therefore, PCA degradation may be via the skeleton edge, which includes active
51