Formaldehyde degradation in the presence of methanol by photo-Fenton process

Kajitvichyanukul, Puangrat; Lu, Ming‐Chun; Jamroensan, A.

doi:10.1016/j.jenvman.2006.12.016

Cited by 51 publications

(42 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is in good agreement with the results reported in the previous studies [21,23,39]. The main reason is for the limited degradation of carbofuran at H 2 O 2 dosage rate of 0.8 mg L −1 min −1 is due to the insufficient residual H 2 O 2 concentration in the system (Fig.…”

Section: Effect Of Fe 3+ On Carbofuran Degradationsupporting

confidence: 92%

Photochemical degradation of carbofuran and elucidation of removal mechanism

Kumar

et al. 2011

Chemical Engineering Journal

View full text Add to dashboard Cite

Section: Effect Of Fe 3+ On Carbofuran Degradationsupporting

confidence: 92%

Photochemical degradation of carbofuran and elucidation of removal mechanism

Kumar

et al. 2011

Chemical Engineering Journal

View full text Add to dashboard Cite

“…4 21 , respectively, at 408C and pH 5.5. In the combination of ultrasound and Fenton reagent, the degradation can achieve better results than either Fenton oxidation or ultrasound alone.…”

Section: Discussionmentioning

confidence: 99%

“…The results are shown in Figure 5. It was found that the degradation of the dye increased with increasing the amount of Fe 21 . However, at the concentration beyond 0.054 mmol L 21 , the degradation of the dye started to decrease.…”

Section: Effect Of Fe 2+ Dosagementioning

confidence: 99%

“…However, at the concentration beyond 0.054 mmol L 21 , the degradation of the dye started to decrease. This is due to the fact that, at a Fe 21 concentration higher than the optimum, the formation rate of hydroxyl radicals originated mainly from the decomposition of H 2 O 2 was so high that much of hydroxyl radicals were consumed by the side reactions before they could be utilized effectively for the degradation of the dye, and ferrous ions themselves may react with hydroxyl radicals resulting in the retardation of the reaction [20,21]. Therefore, we use the 0.054 mmol L 21 Fe 21 for the further experiments.…”

Section: Effect Of Fe 2+ Dosagementioning

confidence: 99%

See 1 more Smart Citation

Degradation of AR 97 aqueous solution by combination of ultrasound and Fenton reagent

Song

2010

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Todos os parâmetros em termos lineares e quadráticos têm influência significativa (p < 0,01%) para a eficiência do processo na redução da DQO e descoloração. O efeito negativo (a 3 < 0, ver Tabelas 5 e 6) em relação ao nível do pH inicial, sugere que a melhor eficiência do processo FF para a redução dos poluentes é obtida com pH inicial em meio ácido, resultados similares foram encontrados em outros trabalhos que afirmam a melhor eficiência dos POAs nas mesmas condições (Kajitvichyanukul & Jamroensan, 2008;Knittel & Schollmeyer, 2008;Makhotkina, et al, 2008;Primo, et al, 2008). A ação do Fe 2+ exerce influência significativa na eficiência do processo FF para a redução da DQO, apresentando efeito negativo para os termos lineares (a 1 = -3,744) e efeito positivo para os termos quadráticos (b 11 = 8, 494) como apresentado na Tabela 5.…”

Section: Tabela 4 -Planejamento Fatorialunclassified

Otimização Do Processo Foto-Fenton Utilizando Irradiação Artificial Na Degradação Do Efluente Têxtil Sintético

Manenti¹,

Gomes²,

Borba³

et al. 2010

Engevista

View full text Add to dashboard Cite

Resumo: Este trabalho investigou a fotodegradação dos poluentes de um efluente têxtil sintético via processo foto-Fenton. O efluente foi preparado pela mistura de seis corantes. Como fontes de irradiação UV, foram utilizadas três lâmpadas comerciais de mercúrio. As variáveis do processo, pH inicial e as concentrações do íon ferro e peróxido de hidrogênio, foram otimizadas baseado nos resultados de redução da demanda química de oxigênio (DQO) e descoloração obtidos no planejamento fatorial 3 3 completo. Foi obtida uma boa representação dos dados experimentais para um modelo estatístico de quarta ordem, verificado pela aplicação de uma análise de variância. Os dados de degradação do ETS foram ajustados pelo modelo cinético de reação pseudo-primeira ordem. Com apenas 5 minutos de irradiação, o processo foto-Fenton apresentou ótima eficiência na redução da DQO, da turbidez, dos sólidos totais, sólidos totais fixos e sólidos totais voláteis, exceto para os compostos aromáticos, que apresentaram resultados significativos de degradação em 60 minutos. Palavras-chave: corante têxtil; foto-Fenton artificial, planejamento experimentalAbstract: In this work, the pollutant photo-degradation of a synthetic textile effluent was investigated by using a lab-scale UV-based photo-Fenton reactor. As a synthetic textile effluent a mixture of six dyeing was prepared. As source of UV radiation three mercury commercial lamps were used. A 3 3 full factorial design was applied in order to seek the best values of initial pH, ion iron and hydrogen peroxide concentrations. The photo-Fenton process response was evaluated on the basis of chemical oxygen demand (COD), color and turbidity reduction values. A good representation of experimental data was obtained by a fourth order statistical model, which was checked out by applying a 2-way ANOVA analysis. A pseudo-first order reaction kinetic was applied to fit the substrate biodegradation data. A good performance of UV-based photo-Fenton process was achieved at 5 min, reducing COD, turbidity, total suspended, fixed and volatile solid, except for aromatic compound which was 95% significantly reduction at 60 min.

show abstract

Formaldehyde degradation in the presence of methanol by photo-Fenton process

Cited by 51 publications

References 17 publications

Photochemical degradation of carbofuran and elucidation of removal mechanism

Photochemical degradation of carbofuran and elucidation of removal mechanism

Degradation of AR 97 aqueous solution by combination of ultrasound and Fenton reagent

Otimização Do Processo Foto-Fenton Utilizando Irradiação Artificial Na Degradação Do Efluente Têxtil Sintético

Contact Info

Product

Resources

About