Photocatalytic degradation of the insecticide diazinon in the presence of prepared nanocrystalline ZnO powders under irradiation of UV-C light

Daneshvar, N.; Aber, Soheil; Dorraji, Mir Saeed Seyed; Khataee, Alireza; Rasoulifard, Mohammad Hossein

doi:10.1016/j.seppur.2007.07.016

Cited by 345 publications

(134 citation statements)

References 36 publications

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“…Therefore, the chlorophenoxyacetic acids are negatively charged above their respective pK a values. As expected, the pH that shows optimal degradation must fall in between pK a < pH < pH zpc , due to the enhanced electrostatic interaction among the anions of the chlorophenoxyacetic acids and the positively charged catalyst surface (Daneshvar, Aber, Seyed-Dorraji, & Khataee, 2007). Above pH 7, the repulsive force between the negatively charged catalyst surface and the hydroxyl ions reduces the formation of hydroxyl radicals and consequently decreases the degradation rate (Qamar, Muneer, & Bahnemann, 2006).…”

Section: Effect Of Initial Phmentioning

confidence: 61%

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Abdullah¹,

Mun²,

Zainal³

et al. 2013

IJC

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ZnO/γ-Fe 2 O 3 nanocomposite was synthesized via simple precipitation. The synthesized nanocatalysts underwent heat treatment at 450 o C for an hour. The characteristics of the nanocomposite were investigated by XRD, TEM, and BET surface area measurement. Zeta potential analysis was used to examine the surface charge properties of the nanocatalysts. The synthesized nanocomposite has an average particle size of 11 nm and a surface area of 20 m 2 g -1 . The potential of ZnO/γ-Fe 2 O 3 as a photocatalyst was evaluated by photodegrading chlorophenoxyacetic acids (PAA, 2,4-D, 2,4,5-T and 4CA). The decomposition of chlorophenoxyacetic acids by ZnO/γ-Fe 2 O 3 followed 4CA > 2,4,5-T ≈ 2,4-D > PAA. The result indicates the applicability of ZnO/γ-Fe 2 O 3 nanocomposite as a photocatalyst in removing organic pollutants in wastewater.

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Section: Effect Of Initial Phmentioning

confidence: 61%

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Abdullah¹,

Mun²,

Zainal³

et al. 2013

IJC

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“…In order to achieve the kinetic information, the zero, first and second order equations (eqs (1)-(3)) were used [8,30]:…”

Section: Kinetics and Electrical Energy Studiesmentioning

confidence: 99%

“…The first-order model explained better the photocatalytic degradation rate. As can be seen from eqs (4) and (5), the relationship between the first-order rate constant (kobs) and initial diazinon concentration was described better by the Langmuir-Hinshelwood (L-H) model [8,30]. versus initial concentration of diazinon, respectively.…”

Section: Kinetics and Electrical Energy Studiesmentioning

confidence: 99%

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Using amino-functionalized Fe3O4-WO3 nanoparticles for diazinon removal from synthetic and real water samples in presence of UV irradiation

Mohagheghian

Ayagh

Godini

et al. 2017

Journal of Advanced Oxidation Technologies

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Abstract:In this research, photocatalytic degradation of diazinon by amino-functionalized Fe 3 O 4 -WO 3 nanoparticles under UV irradiation was investigated with variation of pH, nanocatalyst dose, initial diazinon concentration, different purging gases, H 2 O 2 concentration, and type of organic compounds. Under optimal conditions: pH=.23 % of the insecticide was removed after 120 min. A decrease was observed in the removal efficiency of diazinon in the presence of different purging gases and organic compounds. Based on the three kinetic models developed in this study, it was found that the removal of diazinon followed the first order kinetic. Also, application of the UV/amino-functionalized Fe 3 O 4 -WO 3 nanoparticles both increased the performance and decreased electric power consumption. However, 86.17 % of diazinon in real water samples was removed under the optimized conditions. Furthermore, the photocatalytic activity was kept after five successive cycles.

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“…AOPs are of the most alternative techniques for destruction of many other organic matters in wastewater and effluents. These processes generally involve UV/H 2 O 2 , UV/O 3 , UV/S 2 O 8 2-or UV/Fenton's reagent for degradation of contaminants [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Photochemical oxidation of methyldiethanolamine (MDEA) in aqueous solution by UV/K2S2O8 process

2016

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Methyldiethanolamine (MDEA) as an organic material is a hazardous contaminant in the aquatic environment because of its adverse effects on aquatic life, environment, and humans. In this study, a batch reactor of ultraviolet (UV) light and peroxydisulfate was performed to investigate the degradation of MDEA in aqueous media. The effect of different experimental parameters such as UV irradiation, peroxydisulfate concentration, MDEA concentration, temperature, and solution pH on removal of MDEA was evaluated precisely. No significant degradation was observed with a separate UV light. Adding peroxydisulfate to the solution increased the removal performance more than 75 %.

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Photocatalytic degradation of the insecticide diazinon in the presence of prepared nanocrystalline ZnO powders under irradiation of UV-C light

Cited by 345 publications

References 36 publications

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Using amino-functionalized Fe3O4-WO3 nanoparticles for diazinon removal from synthetic and real water samples in presence of UV irradiation

Photochemical oxidation of methyldiethanolamine (MDEA) in aqueous solution by UV/K2S2O8 process

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