Abstract
This work aims to investigate the degradation of 2,4,6 trinitrotoluene (TNT) as a model typical nitro‐aromatic compound. The degradation process was carried out by hydroxyl radical that was produced via hydrogen peroxide activated by nano zero‐valent iron (Fe0). The nanoparticles as a source of ferrous ions were synthesized by precipitation method using a starch coating as a stabilizer. The transmission electron microscope analysis revealed that the size of the Fe0 particles is about 40 nm. The operating parameters were optimized using central composite design as a kind of response surface methodology. The degradation efficiency of 91% during 10 minutes and mineralization efficiency of 83% during 40 minutes were obtained under the experimental conditions of 30 mg/L TNT, 104.8 mg/L Fe0, 675 mg/L H2O2, and pH of 3.5. Finally, redwater treatment as real nitro‐aromatic wastewater was evaluated by this process, and 63% removal efficiency was attained after 40 minutes in the optimum condition. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 477–482, 2019
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