Degradation and detoxification of diazinon by sono-Fenton and sono-Fenton-like processes

Wang, Chikang; Shih, Yi-Heng

doi:10.1016/j.seppur.2014.11.005

Cited by 113 publications

(29 citation statements)

References 32 publications

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“…El tratamiento mediante ultrasonido (US) de baja frecuencia (< 50 kHz) se ha empleado recientemente para intensificar los procesos F (US/F) y FF (US/FF) (Wang y Shih 2015, Ammar 2016, Cai et al 2016. El US se basa en el fenómeno de cavitación acústico, que ocurre dentro de un líquido por la aplicación de frecuencias de ultrasonido.…”

Section: Introductionunclassified

Tratamiento De Aguas Residuales De La Industria Textil Mediante Coagulación Química Acoplada a Procesos Fenton Intensificados Con Ultrasonido De Baja Frecuencia

GilPavas¹,

Arbeláez-Castaño²,

Medina-Arroyave³

et al. 2018

Rev. Int. Contam. Ambie.

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Palabras clave: procesos avanzados de oxidación, sonoquímica, ultrasonido, Box-Behnken, optimización RESUMENEn la presente investigación se evaluó el tratamiento secuencial de coagulación quími-ca (CQ) seguida de los procesos avanzados de oxidación (PAO) Fenton (H2O2/Fe 2+ ) o foto-Fenton (UV/H2O2/Fe 2+ ) intensificados con radiación de ondas de ultrasonido (US) de baja frecuencia. La optimización del proceso de pretratamiento con CQ, mediante la prueba de jarras, mostró que una dosis óptima de coagulante (Al2[SO4]3) de 800 mg/L, remueve 99 % de la turbidez y 53 % de la demanda química de oxígeno (DQO). El clarificado resultante se empleó para la evaluación de los PAO. Mediante el análisis estadístico del diseño de experimentos de superficie de respuesta Box-Behnken se estableció que las condiciones óptimas de operación para el proceso US/H2O2/Fe 2+ fueron: 1 mM de Fe 2+ , 14 mM de H2O2 y pH 3. En estas condiciones de operación el proceso de CQ acoplado con el proceso US/H2O2/Fe 2+ removió alrededor de 82 % de la DQO en tanto que al acoplarlo con el proceso US/UV/H2O2/Fe 2+ alcanzó 95 % de eliminación en 90 min de reacción. El uso de ondas de ultrasonido incrementa la eficiencia del proceso alrededor de 10 %. Durante el proceso también se monitorearon la mineralización de los contaminantes y el consumo de H2O2.Key words: avanced oxidation process, sonochemistry, ultrasound, Box-Behnken, optimization

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Section: Introductionunclassified

Tratamiento De Aguas Residuales De La Industria Textil Mediante Coagulación Química Acoplada a Procesos Fenton Intensificados Con Ultrasonido De Baja Frecuencia

GilPavas¹,

Arbeláez-Castaño²,

Medina-Arroyave³

et al. 2018

Rev. Int. Contam. Ambie.

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“…Many heterogeneous catalysts have been reported to catalyze the decomposition of H 2 O 2 for water treatment [6][7][8][9][10][11][12]. Both iron-containing and iron-free catalysts have been studied, and external energy supply (e.g., sonication [13,14], electricity [2] and light irradiation [9,[15][16][17]) is adopted in many cases to enhance the performance of heterogeneous catalysis. For instance, humic acid modified Fe 3 O 4 served as a Fenton-like catalyst and catalyzed the degradation of sulfathiazole [6].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fe3O4/TiO2/C Nanocomposites and Their Application in Fenton-Like Catalysis for Dye Decoloration

Liu

Zhang

et al. 2016

Catalysts

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Abstract:Fe 2+ -H 2 O 2 Fenton system is widely applied in water treatment nowadays, but the acidification and sludge generation are crucial problems to be solved. Herein, we report that Fe 3 O 4 /TiO 2 /C nanocomposites (FTCNCs) were able to catalyze the decomposition of H 2 O 2 at neutral pH and can be applied in dye decoloration. FTCNCs were prepared by precipitating TiO 2 on Fe 3 O 4 cores via the hydrolysis of tetrabutyl titanate followed by the hydrothermal dehydrogenization of glucose to deposit carbon on Fe 3 O 4 /TiO 2 . The decoloration of methylene blue (MB) in the FTCNC-H 2 O 2 Fenton-like system was monitored to reflect the catalytic activity of FTCNC. The radical generation capability was analyzed by electron spin resonance. Our results indicated that FTCNC-H 2 O 2 Fenton-like system was efficient in decolorizing MB, and the radicals led to the near complete oxidation of MB. The FTCNC-H 2 O 2 Fenton-like system could be used in a wide pH range of 4-9. A greater catalyst amount, a higher H 2 O 2 concentration, and a higher temperature accelerated the decoloration kinetics. FTCNCs showed good activity after the regeneration of 8 cycles. The implication to the practical applications of FTCNCs in water treatment is discussed.

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“…PMS activation using cobalt containing materials as heterogeneous catalysts 9 (Co/PMS) seems to be a promising strategy. Multifarious heterogeneous cobalt-based 10 catalysts have been investigated so far, including cobalt oxides, spinel-type ferrite 11 particles and immobilized cobalt catalysts [51][52][53][54][55][56][57][58]. This review aims to provide a 12 latest summary of various heterogeneous cobalt-based catalysts for PMS activation 13 and their synthetic strategies.…”

mentioning

confidence: 99%

“…Simultaneously, cobalt hydroxide complexes would be produced at high pH 13 conditions, resulting in the decreased oxidation potential and catalytic activity [54,56]. (Fig.…”

mentioning

confidence: 99%

“…21 crystal growth initializers by the electrostatic interaction between CTA + cationic ion 22 and the negatively charged Fe-OH-Co. By adjusting the stoichiometric Fe/Co ratio, Su 23 et al synthesized a series of Co x Fe 3-x O 4 (x = 0, 0.2, 0.5, 0.75) magnetic nanoparticles 24using a hydrothermal method[56]. The results showed that the decomposition rate of 25 Rhodamine B (RhB) increased with the increase of cobalt contents in the magnetite26 catalysts, which were attributed to not only the higher activation rate of HSO 5 -27 caused by the doping cobalt species, but also the strong intimate Fe-Co interactions to28 form CoOH +(Eqs.…”

mentioning

confidence: 99%

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Cobalt-catalyzed sulfate radical-based advanced oxidation: A review on heterogeneous catalysts and applications

Long

2016

Applied Catalysis B: Environmental

1,832

394

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Degradation and detoxification of diazinon by sono-Fenton and sono-Fenton-like processes

Cited by 113 publications

References 32 publications

Tratamiento De Aguas Residuales De La Industria Textil Mediante Coagulación Química Acoplada a Procesos Fenton Intensificados Con Ultrasonido De Baja Frecuencia

Tratamiento De Aguas Residuales De La Industria Textil Mediante Coagulación Química Acoplada a Procesos Fenton Intensificados Con Ultrasonido De Baja Frecuencia

Preparation of Fe3O4/TiO2/C Nanocomposites and Their Application in Fenton-Like Catalysis for Dye Decoloration

Cobalt-catalyzed sulfate radical-based advanced oxidation: A review on heterogeneous catalysts and applications

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