Combined zero-valent iron and fenton processes for the treatment of Brazilian TNT industry wastewater

Treatment of ammunition wastewater by the combined Fe 0 /air and Fenton process (1 st Fe 0 /air-Fenton-2 nd Fe 0 /air)

“…, 1 st Fe 0 /airFenton-2 nd Fe 0 /air), which was different from the existing twostep oxidation ( i.e. , ZVI-Fenton) [5,14] . First, the wastewater was treated by 1 st Fe 0 /air; and then, its effluent was further treated by Fenton oxidation; furthermore, the effluent from Fenton process was treated by 2 nd Fe 0 /air.…”

“…In literatures, it has been reported that the toxic nitro-aromatic pollutants could not be mineralized effectively by the conventional biological treatment processes because electron-withdrawing nitro group ( -NO 2 ) would inhibit the activity of electrophilic enzymes [5,6] . To mineralize these nitroaromatic compounds, many physico-chemical methods including combined ultrasound and Fenton (US-Fenton) process [1] , Electro-Fenton [7,8] , sonoelectroFenton oxidation [9] , absorption [10] , vacuum distillation [11] and * Corresponding author.…”

“…Meanwhile, 2,4-dinitroanisole (DNAN) and TNT producing wastewater could be treated by the combined zero valent iron (ZVI) and Fenton oxidation process ( i.e. , Fe 0 -Fenton process) [5,14,15] . In additional, Oh et al found that Fenton oxidation of TNT and RDX could be improved through pretreatment with ZVI [16] .…”

Electrochemical Methods for Synthesis of Energetic Materials and Remediation of Waste Water

“…The traditional Fenton's reagent consists of hydrogen peroxide in the presence of a ferrous salt, and has been used in the treatment of a very wide range of chemical species and industrial wastes, including some energetic materials such as nitramines [57][58][59], nitroaromatics [58,59], NTO [60], and TNT wastewater [61] and pink water [62]. The reagent system generates several active chemical oxidants, including the hydroxyl radicals and complexes of the ferric ion.…”

Preparation and application of novel catalytic-ceramic-filler in a coupled system for TNT manufacturing wastewater treatment

“…Therefore, TNT dose not easily release free electrons which avoid electrophilic attack through enzymes, suggesting that it may not be effectively degraded by conventional biological treatment [23]. Hence a suitable pretreatment is needed to increase the electron density, to decrease the stability of the benzene ring, and finally to improve the biodegradability of the wastewater.…”