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1

Treatment of the pistachio processing wastewater using Fenton’s, ultrasound with Fenton’s, and coagulation processes

Demir O., Rastgeldi B.

Environment Protection Engineering

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2018

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Vol. 44, nr 1

167--180

EN

Pistachio processing wastewater was characterized and the treatability of wastewater using Fenton’s process, the combination of Fenton’s process with ultrasonic irradiation and coagulation processes was investigated. [Fe2+] = 27.6 mg/dm3, [H2O,sub>2]= 30 mg/dm3 and 75 min of reaction time were determined as the optimum conditions for Fenton’s process. Then, the combined treatment (ultrasound with Fenton’s process, was applied to the pistachio processing wastewater and 45% of COD removal efficiency was obtained. For the coagulation process, the optimum removal efficiencies of 60% and 45% were achieved for FeCl3 dosage of 2000 mg/dm3 and Al2(SO4)3 dosage of 3000 mg/dm3, respectively. The results demonstrate that higher COD removal efficiencies could be obtained from the combined ultrasound and Fenton’s process with respect to Fenton’s process alone. Besides, applying the coagulation process using FeCl3and Al2(SO4)3 also presents high COD removal efficiencies.

2

Synthesis of Hexabenzylhexaazaisowurtzitane (HBIW) under Ultrasound Irradiation with Fe3O4@PCA Nanoparticles as an Efficient and Reusable Nanomagnetic Catalyst

Malekzadeh A. M., Shokrollahi S., Ramazani A., Rezaei S. J. T., Asiabi P. A., Joo S. W.

Central European Journal of Energetic Materials

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2017

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Vol. 14, no. 2

336--350

EN

Magnetic Fe3O4@polycitric acid (Fe3O4@PCA) nanoparticles were prepared by the reaction of Fe3O4 nanoparticles with an excess amount of citric acid at 100-160 °C. The magnetic Fe3O4@PCA nanoparticles were characterized by infrared spectroscopy (FTIR), scanning electron microscope (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TGA) and powder X-ray diffraction (XRD). Finally, the synthesized magnetic Fe3O4@PCA nanoparticles were used as a heterogeneous solid acid catalyst for the synthesis of HBIW from benzylamine and glyoxal in acetonitrile-water solvent under ultrasonic irradiation conditions. The catalyst could be reused up to 6 times without significant loss of activity.

3

Acid-Promoted Synthesis of Imidazolyl-Pyrazole Derivatives via a Multicomponent Reaction Using Ultra Sound Irradiation

Baria B., Viradiya D., Kotadiya V., Kakadiya R., Shah A.

International Letters of Chemistry, Physics and Astronomy

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2014

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Vol. 11, iss. 3

277--283

EN

Some new imidazolyl pyrazole derivatives have been synthesized using benzil, ammonium acetate, and heterocyclic aldehyde in ethanol and acetic acid under ultra sound irradiation. The obtained products using this approach are having high purity and good in yield. By conducting the reactions in ethanol, the solid products were precipitated out and could be isolated simply by filtration. The synthesized compounds were characterized by various analytical techniques such as 1H and 13C NMR and further supported by mass spectroscopy.

4

Synthesis, Characterization and Anti-diabetic activity of 1,3,5-triaryl-2-pyrazolines in acetic acid solution under Ultrasound Irradiation

Emayavaramban M., Santhi N., Gopi C., Manivannan C., Raguraman A.

International Letters of Chemistry, Physics and Astronomy

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2013

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Vol. 9, iss. 2

172-185

EN

A chalcone was prepared by the reaction of 4-methylbenzaldehyde with 4-methylacetophenone in dilute methanolic sodium hydroxide solution under ultrasonic irradiationin the water bath of an ultrasonic cleaner at room temperature. Treatment of this chalcone with thiosemicarbazide / semicarbazide hydrochloride / benzhydrazide / benzenesulphonyl hydrazide / phenylhydrazine hydrochloride afforded the corresponding 2-pyrazoline in good yields. All the new compounds have been characterized by IR, 1H-NMR, 13CNMR spectral data. All the target compounds were evaluated for their in-vivo anti - diabetic activity in rates in comparison with as reference drug.

5

Sonondegradation of organophosphorus pesticides in water

Dehghani M. H., Fadaei A.

Environment Protection Engineering

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2013

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Vol. 39, nr 4

5--14

EN

Organophosphorus pesticides (OPPs), such as diazinon and malathion, are widely found in water resources. When absorbed by human organisms, OPP s are very toxic mainly because they deactivate acetyl cholinesterase. In the present study, the degradation of diazinon and malathion was investigated. The experiments were conducted for diazinon concentrations of 100, 300, 500 μg/dm3 and malathion concentrations of 200,400,600 μg/ dm3. Sonochemical examination was done using an ultrasonic reactor at 130 kHz and 500 NW for five times, and then the amount of the pesticide in a sample was measured by the gas chromatography with a flame ionization detector (GC-FID).The highest degradation of malathion and diazinon by the sonolysis process occurred at pH 9 and 3, respectively. The study demonstrates that malathion and diazinon could be effectively degraded by ultrasonic irradiation.

6

Kinetics of degradation of perchloroethylene under ultrasonic irradiation and photooxidation in aqueous solution

Kargar M., Nabizadeh R., Naddafi K., Nasseri S., Mesdaghinia A., Mahvi A. H., Alimohammadi M., Nazmara S.

Environment Protection Engineering

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2013

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Vol. 39, nr 4

29--38

EN

Sonolysis and photodegradation of various compounds such as chlorinated aliphatic hydrocarbons are the recent advanced oxidation processes. Perchloroethylene PCE is one of these compounds mainly used as a solvent and degreaser. In this work, elimination of perchloroethylene in aqueous solution by ultrasonic irradiation and photooxidation by UVC were investigated. Head space gas chromatography with FID detector was used for analyses of PCE. Results showed that PCE could be effectively and rapidly degraded by ultrasonic irradiation, photooxidation by UVC and combination of these methods. The order of studied reactions for degradation PCE has been determined.