Influence of radio-frequency and microwave electromagnetic treatment on water-in-oil emulsion separation

Kovaleva, L. A.; Zinnatullin, R. R.; Musin, A. A.; Gabdrafikov, A. F.; Sultanguzhin, R. F.; Kireev, V. N.

doi:10.1016/j.colsurfa.2020.126081

Cited by 15 publications

(6 citation statements)

References 15 publications

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“…Such methods as coagulation [12,13], flocculation [14,15], flotation [16,17], sorption [18], electromagnetic separation [19,20] can be used to solve the problem of wastewater treatment from oil pollution. Currently, membrane separation methods (ultrafiltration, reverse and direct osmosis) are the most promising for the purification of water-oil emulsions, due to their high energy efficiency, selectivity, and economy [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Poly(Ethylene Terephthalate) Track-Etched Membranes for the Separation of Water-Oil Emulsions

Yeszhanov¹,

Korolkov²,

Shakayeva³

et al. 2023

Eurasian J. Chem.

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Rapid industrial growth in the petrochemical, pharmaceutical, metallurgical and food industries, as well as stormwater that accumulates pollution from the roadway and the territories of motor transport enterprises, gas stations, car washes and other municipal services have led to the formation of a large amount of oily wastewater. Oil-containing wastewater is a multicomponent, multiphase water system and, as a rule, is in a state stabilized by various factors, which greatly complicates their processing. Pollution of water sources with oil-containing compounds leads to negative consequences for both living organisms and human health. Therefore, the need to treat oily wastewater is an urgent problem. In this article, poly(ethylene terephthalate) track-etched membranes (PET TeMs) with pore diameters of ~ 5.1 μm and pore density of 1∙106 pore/cm2 were modified by formation of polyelectrolyte complexes of PET TeMs surface with poly(allylamine) (PAAm) and tested for oil-water separation by using hexadecane/water (at pH=2) and chloroform/water (at pH=2) emulsions. Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM), en-ergy dispersive X-ray (EDX) analysis, contact angle measurements were used for membrane characterization. The efficiency of oil-water separation was evaluated by flux measurements. Results showed separation per-formance of 267 mL/m2·s for hexadecane/water (pH=2) and 100 mL/m2·s for chloroform/water (pH=2) at vacuum pressure of 700 mbar.

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Section: Introductionmentioning

confidence: 99%

Preparation of Poly(Ethylene Terephthalate) Track-Etched Membranes for the Separation of Water-Oil Emulsions

Yeszhanov¹,

Korolkov²,

Shakayeva³

et al. 2023

Eurasian J. Chem.

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“…This method has the advantages of high measurement accuracy, high repeatability, small measurement circuit size and short delay, which has attracted more and more attention. Kovaleva compared the efficiency of the electromagnetic treatment of water-in-oil emulsions using radio-frequency and microwaves [13]. Dang et al designed a crude oil water cut measurement system based on electromagnetic wave transmission theory [14].…”

Section: Introductionmentioning

confidence: 99%

Design of crude oil water content measuring chip based on RF method

Sun,

Tang

2023

Meas. Sci. Technol.

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Based on the measurement principle of RF method, a crude oil moisture content detect chip is designed with 180 nm CMOS technology. All crude oil water content detect circuits are integrated on a chip for the first time. The chip can realize capacitance measurement in the range of 50–3000 pF, the maximum output current reaches 22 mA, and the maximum current span is less than 0.062 mA. The test results of the crude oil water content measurement system built based on the chip show that the water content test results have high linearity, with the maximum output current span of 1.09 mA. With the help of modern numerical calculation methods, the actual water content in crude oil can be accurately obtained by parameter calibration of the measured value. The inherent shortcomings of the detection circuit built with discrete components are solved, which means that the detection circuit of crude oil water content has fewer components, smaller size, and higher detection accuracy.

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“…To achieve the reduction of DOM in rainwater through a chemical process, numerous purification processes have been used in terms of the oxidation process that promotes a faster reduction of DOM with low molecular size in water. Radio-frequency (RF) is an electromagnetic field system in the frequency range of 20 kHz to 300 GHz [22][23][24]. RF technology has been used for diverse purposes in many different areas.…”

Section: Introductionmentioning

confidence: 99%

Effect of Radio-Frequency Treatment on the Changes of Dissolved Organic Matter in Rainwater

Hazmi

Rosadi

Desmiarti

et al. 2022

Water

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Rainwater is a potential source of drinking water, but has various components of dissolved organic matter (DOM). DOM is a reservoir of potential hazards in drinking water. Therefore, a new method is required to purify rainwater as a drinking water source in terms of DOM aspects. A radio-frequency (RF) treatment system is introduced here to purify source water with a small possibility of contamination. RF is generated by applying a frequency of 1.5 MHz through a glass reactor with a diameter of 2 mm which is wrapped by a 2 mm copper wire. The results demonstrate that UV260 value and dissolved organic carbon (DOC) are reduced during RF treatment. DOC was reduced by a lower amount compared to UV260, suggesting the partial transformation of bio-refractory DOM. A fluorescence excitation-emission matrix showed that humic-like substances in rainwater were reduced faster than protein-like ones, indicating that humic-like substances are susceptible to reduction by RF treatment. The results offer information on the use of RF treatment in a rainwater purification process for the production of drinking water.

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Influence of radio-frequency and microwave electromagnetic treatment on water-in-oil emulsion separation

Cited by 15 publications

References 15 publications

Preparation of Poly(Ethylene Terephthalate) Track-Etched Membranes for the Separation of Water-Oil Emulsions

Preparation of Poly(Ethylene Terephthalate) Track-Etched Membranes for the Separation of Water-Oil Emulsions

Design of crude oil water content measuring chip based on RF method

Effect of Radio-Frequency Treatment on the Changes of Dissolved Organic Matter in Rainwater

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