Rate equation for the degradation of nitrobenzene by ‘Fenton-like’ reagent

Rodríguez, Ma Paloma González; Timokhin, Vitaliy I.; Contreras, Sandra; Chamarro, Esther; Esplugas, Santiago

doi:10.1016/s1093-0191(02)00024-2

Cited by 56 publications

(34 citation statements)

References 47 publications

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“…Fenton process has been reported to be successful when applied to the treatment of several organic chemicals [10][11][12][13][14][15][16][17][18][19], mainly among the aromatics, and wastewaters like textile dye industry effluent [20], pulp industry effluent [21] and landfill leachate [7,22]. Despite its highly oxidative efficiency and environmental friendly nature, the application of Fenton's reagent to wastewater treatment is limited by the final production of ferric iron sludge, which may add additional waste disposal cost.…”

Section: Introductionmentioning

confidence: 99%

“…Besides covering the above range of structures and iron complexes formation constants (Table 1), these chemicals are widely present in domestic and industrial wastewaters (e.g. detergents, cleaning and decontaminating products, solvents, pesticides, and in the agro-industrial and food processing, textile, paper, pharmaceutical and metal industries) and require an effective treatment [11,16,17,23,28,29,36,42].…”

Section: Introductionmentioning

confidence: 99%

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The role of iron on the degradation and mineralization of organic compounds using conventional Fenton and photo-Fenton processes

Hermosilla

Cortijo

Huang

2009

Chemical Engineering Journal

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a b s t r a c tThe role of iron on the degradation of different organic compounds, differing in their structure (aliphatic versus aromatic) and iron complex formation capacity, by conventional and photo-Fenton processes was investigated. Results show that these chemical characteristics can affect the degree of treatment in terms of COD and TOC removals. While aromatics exhibited a fast and great reduction in the COD by the conventional Fenton process, aliphatic compounds, apart from acetic acid, required the presence of UV light to enhance treatment results. EDTA and oxalic acid responded very positively to UV irradiation in both COD removal and mineralization, reaching the highest values showed by aromatics; and results depended on the intensity of the UV light applied. Phenol and 4-nitrophenol responded favourably to UV irradiation in terms of mineralization and slightly in COD removal. Reductions in the COD were almost total (95.99%), while only an 80% of reduction in the TOC was achieved, for the best photo-Fenton treatment of oxalic acid, phenol and nitrophenol. 60% COD and 40% TOC removals were achieved correspondingly in the case of EDTA. Acetic acid showed almost no mineralization and low COD removal (≈20%) when treated by a conventional Fenton process; and did not enhanced results when assisting the treatment with UV light. Photo-regeneration of ferrous ion and photo-decarboxylation of iron carboxylates are assessed in the framework of these results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The role of iron on the degradation and mineralization of organic compounds using conventional Fenton and photo-Fenton processes

Hermosilla

Cortijo

Huang

2009

Chemical Engineering Journal

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“…It seems that the number of hydroxyl radicals yielded by high concentrations of hydrogen peroxide is larger than the number yielded by high concentration of Fe 3+ . Many researchers have reported that the Fenton reaction yielded hydroxyl radicals which were able to oxidize various organic compounds [10,14,[21][22][23][24].…”

Section: Degradation and Dechlorination Of Pce By The Fenton Reactionmentioning

confidence: 99%

Kinetic correlation between degradation and dechlorination of perchloroethylene in the Fenton reaction

Kim

Lee

Ahn

et al. 2010

Korean J. Chem. Eng.

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In the Fenton reaction, degradation and dechlorination are directly affected by the concentrations of hydrogen peroxide and Fe 3+ . Although there is considerable research on the biodegradation of chlorinated compounds combined with the Fenton reaction, the kinetics of degradation and dechlorination of the reaction, with various concentrations of hydrogen peroxide and Fe 3+ , have been rarely investigated. Therefore, we investigated the degradation and dechlorination of PCE with various concentrations of hydrogen peroxide and Fe 3+ . The initial concentration of PCE (10 µM) decreased from a value of 8.9 µM (with 0.1 mM of hydrogen peroxide and 5 mM of Fe 3+ ) to 1.1 µM (with 10 mM of hydrogen peroxide and 5 mM of Fe 3+ ); the respective values for chloride ions produced were 0.9 and 21.6 µM. Also, the initial 10 µM of PCE decreased from 8.9 (with 0.1 mM of Fe 3+ and 5 mM of hydrogen peroxide) to 2.2 µM (with 10 mM of Fe 3+ and 5 mM of hydrogen peroxide); the respective chloride ions produced were 0.7 and 14.5 µM. The logarithmic correlations between the degradation and dechlorination coefficients were 0.7682 and 0.7834 for concentrations of hydrogen peroxide and Fe 3+ , respectively. Both coefficients were used, from all possible cases, to derive six models which displayed both the ratio of degradation and dechlorination and the hydrogen peroxide and Fe 3+ concentrations. The dechlorination of PCE could then be predicted with the model obtained by the coefficient with the concentration of hydrogen peroxide and Fe 3+ . The models could be applied to various Fenton reactions for optimization of degradation or dechlorination, such as biodegradation of PCE which is scarcely degraded by aerobic bacteria.

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“…In general, the mechanism of Fenton reaction included the formation of hydroxyl free radicals, which has E • of 2.8 V, that can oxidize and mineralize almost all the organic carbons to CO 2 and H 2 O (Glaze et al, 1987), by the interaction of hydrogen peroxide with ferrous ions (Walling C., 1975). The Fenton's reagent is generally occurred in acidic medium between pH 2 -4 (Rodriguez et al, 2003). The advantage of Fenton process is the complete destruction of contaminants to harmless compounds, for instance, carbon dioxide and water (Neyen E. et al, 2003).…”

Section: Introductionmentioning

confidence: 99%