The degradation and mineralization efficiency of NB in the systems looked at in this study were determined by measuring the NB concentration and COD values before and after reaction. The influence of pH, Fe(0)-mass and EDTA on the degradation and mineralization efficiencies were also investigated. | JOURNAL OF SCIENCE OF HNUE Chemical and Biological Sci. 2014 Vol. 59 No. 9 pp. 59-65 This paper is available online at http NITROBENZENE DEGRADATION INDUCED BY OXYGEN ACTIVATION IN A ZERO-VALENT IRON AIR EDTA WATER SYSTEM Tran Duc Luong1 Nguyen Hoai Nam2 and Tran Van Chung3 1 Faculty of Biochemistry Nam Dinh University of Nursing 2 Institute of Material Science Vietnamese Academy of Science and Technology 3 Institute of Chemistry and Material Academy of Military Science and Technology Abstract. Nitrobenzene NB is a recalcitrant organic compound that can be degraded and mineralized by oxygen activation induced in a zero-valent iron air EDTA water system. The degradation and mineralization efficiency of NB in the systems looked at in this study were determined by measuring the NB concentration and COD values before and after reaction. The influence of pH Fe 0 -mass and EDTA on the degradation and mineralization efficiencies were also investigated. Keywords Nitrobenzene activation of oxygen zero-valent iron. 1. Introduction Nitrobenzene NB and its derivative compounds are widely used in practices that can harm ecological systems and human health 11 . NB is a toxic recalcitrant organic compound and a dangerous environmental pollutant that is present in industrial wastewater 1 3-5 9 12 . NB from wastewater can be treated using various methods 9 . Of these methods an advanced oxidation process that removes NB with high efficiency is presented in this paper. This method which destroys NB that is present in wastewater using oxygen activated with ZVI and EDTA is described in detail. An aqueous system consisting of oxygen ZVI and EDTA can producing free radical OH which can oxidize NB and other recalcitrant organic compounds 1 3 5-8 10 . The process of oxygen activation using ZVI with EDTA to produce free radical OH is suggested in 5 . It is hypothesized that the mechanism of the process is the production of reactive oxygen intermediates. Intermediates such
