Study of photochemical and sonochemical processes efficiency for degradation of dyes in aqueous solution

Maleki, Afshin; Mahvi, Amir Hossein; Ebrahimi, Roya; Zandsalimi, Yahya

doi:10.1007/s11814-010-0261-0

Cited by 67 publications

(23 citation statements)

References 32 publications

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“…Several studies have been performed on application of photochemical oxidation and sonolysis especially at low concentrations in removal of various pollutants [20-22]; but there are few studies regarding PCE degradation by sonolysis and photochemical oxidation (UVC/ H 2 O 2 ) at micromolar concentration and with a 130 kHz frequency ultrasound. In this work, the degradation rates of PCE at different concentration levels and different pH levels with using an ultrasound bath at 130 kHz frequency and photochemical oxidation with UVC/ H 2 O 2 were studied.…”

Section: Introductionmentioning

confidence: 99%

Modeling perchloroethylene degradation under ultrasonic irradiation and photochemical oxidation in aqueous solution

Kargar

Nabizadeh

Naddafi

et al. 2012

J Environ Health Sci Engineer

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Sonolysis and photochemical degradation of different compounds such as chlorinated aliphatic hydrocarbons are among the recent advanced oxidation processes. Perchloroethylene is one of these compounds that has been mainly used as a solvent and degreaser. In this work, elimination of perchloroethylene in aqueous solution by ultrasonic irradiation, andphotochemical oxidation by ultra violet ray and hydrogen peroxide were investigated. Three different initial concentrations of perchloroethylene at different pH values, detention periods, and concentrations of hydrogen peroxide were investigated. Head space gas chromatography with FID detector was used for analyses of perchloroethylene. This research was performed in 9 months from April through December 2011.Results showed that perchloroethylene could be effectively and rapidly degraded by ultrasonic irradiation, photochemical oxidation by ultra violet ray, hydrogen peroxide and a combination of these methods. Kinetics of perchloroethylene was strongly influenced by time, initial concentration and pH value. Degradation of Perchloroethylene increased with decrease in the initial concentration of perchloroethylene from 0.3 to 10 mg/L at all initial pH. The results showed an optimum degradation condition achieved at pH = 5 but did not affect significantly the perchloroethylene destruction in the various pH values. Kinetic modeling applied for the obtained results showed that the degradation of perchloroethylene by ultrasound and photo-oxidation followed first order and second order model. The percentage of removal in the hybrids reactor was higher than each of the reactors alone, the reason being the role of hydroxyl radical induced by ultrasound and photochemical reaction.

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Section: Introductionmentioning

confidence: 99%

Modeling perchloroethylene degradation under ultrasonic irradiation and photochemical oxidation in aqueous solution

Kargar

Nabizadeh

Naddafi

et al. 2012

J Environ Health Sci Engineer

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“…Biological and chemical degradation of fuel oil is more difficult in comparison with lowerrange petroleum hydrocarbons such as diesel and gasoline, which is due to their lower volatility, lower biodegradability, higher viscosity, and lower mobility (Tsai & Kao 2009). Many different advanced oxidation processes including peroxide oxidation, photochemical and sonochemical process, are efficient in degradation of organic pollutants from aqueous and soil media ( Mahvi et al 2009;Maleki et al 2010;Gholami-Borujeni et al 2011).…”

mentioning

confidence: 99%

Remediation of fuel oil contaminated soils by activated persulfate in the presence of MnO<sub>2</sub>

Mazloomi¹,

Nasseri²,

Nabizadeh³

et al. 2016

Soil & Water Res.

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Mazloomi S., Nasseri S., Nabizadeh R., Yaghmaeian K., Alimohammadi K., Nazmara S., Mahvi A.H. (2016): Remediation of fuel oil contaminated soils by activated persulfate in the presence of MnO 2 . Soil & Water Res., 11: 131-138.In this study, batch system experiments were carried out for evaluating the capability of persulfate (PS) to remediate fuel oil contaminated soils. Remediation was performed by spiking soil samples with fuel oil and then treating the mixture with sodium PS. Different controlling factors including pH (3, 6, and 9), PS concentrations (50-500 mmol/l), metal activators (ferrous sulfate, magnetite, and MnO 2 ), and temperature (25, 40, and 60°C) were considered. Results proved that PS oxidation is effective in fuel oil degradation. The best PS : Fe 2+ molar ratios were reported 400 : 2 and 250 : 1 for silty clay and loamy sand soil samples, respectively. Lower pH was more of interest in removal of fuel oil by PS oxidation. MnO 2 improved fuel oil degradation when used together with metal activators. The results showed that when MnO 2 was used together with ferrous sulfate and magnetite at acidic condition (pH = 3), the removal efficiencies were the best. Increasing temperature from 25 to 60°C improved the fuel oil degradation in the PS oxidation batch system. The results showed that activating PS by using ferrous sulfate along with MnO 2 at acidic condition in 60°C could increase fuel oil degradation near to 58% in silty clay soil samples, while the degradation rate for loamy sand soil samples in similar conditions was 62%.

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“…The presumed reason is that when the initial concentration of dye is increased, the competition between the dye intermediates and parent dye for hydroxyl radical becomes intense owing to the non-selective reactivity of hydroxyl radical. Additionally, in the US process, with increasing initial dye concentration the cavities approaches saturation [34] and [4]. …”

Section: Discussionmentioning

confidence: 99%

Effectiveness of photochemical and sonochemical processes in degradation of Basic Violet 16 (BV16) dye from aqueous solutions

Rahmani

Kermani

Gholami

et al. 2012

J Environ Health Sci Engineer

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In this study, degradation of Basic Violet 16 (BV16) by ultraviolet radiation (UV), ultrasonic irradiation (US), UV/H2O2 and US/H2O2 processes was investigated in a laboratory-scale batch photoreactor equipped with a 55W immersed-type low-pressure mercury vapor lamp and a sonoreactor with high frequency (130kHz) plate type transducer at 100W of acoustic power. The effects of initial dye concentration, concentration of H2O2 and solution pH and presence of Na2SO4 was studied on the sonochemical and photochemical destruction of BV16 in aqueous phase. The results indicated that in the UV/H2O2 and US/H2O2 systems, a sufficient amount of H2O2 was necessary, but a very high H2O2 concentration would inhibit the reaction rate. The optimum H2O2 concentration was achieved in the range of 17 mmol/L at dye concentration of 30 mg/L. A degradation of 99% was obtained with UV/H2O2 within 8 minutes while decolorization efficiency by using UV (23%), US (<6%) and US/H2O2(<15%) processes were negligible for this kind of dye. Pseudo-first order kinetics with respect to dyestuffs concentrations was found to fit all the experimental data.

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Study of photochemical and sonochemical processes efficiency for degradation of dyes in aqueous solution

Cited by 67 publications

References 32 publications

Modeling perchloroethylene degradation under ultrasonic irradiation and photochemical oxidation in aqueous solution

Modeling perchloroethylene degradation under ultrasonic irradiation and photochemical oxidation in aqueous solution

Remediation of fuel oil contaminated soils by activated persulfate in the presence of MnO<sub>2</sub>

Effectiveness of photochemical and sonochemical processes in degradation of Basic Violet 16 (BV16) dye from aqueous solutions

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