Influence of Humidity and of the Electric and Magnetic Microwave Radiation Fields on the Remediation of TCE-contaminated Natural Sandy Soils

Horikoshi, Satoshi; Muratani, Masaru; Miyabe, Kouta; Ohmura, Keisuke; Hirowatari, Tomoaki; Serpone, Nick; Abe, Masahiko

doi:10.5650/jos.60.375

Cited by 8 publications

(4 citation statements)

References 15 publications

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“…Microwave treatment of contaminated soils can be used for gradual improvement of soil condition. Studies have shown effective removal of polyaromatic hydrocarbons (PAHs) from two samples of contaminated soil [4,5]. The levels of organic removal depend on the electric intensity of the field created in the microwave applicator.…”

Section: Introductionmentioning

confidence: 99%

“…ISSN 2664-9969 literature information about their content in the surface layer of the soil up to 30 cm deep (from 0.01 mg/kg up to 3-5 mg/kg), the initial density of pollution in experiments with pesticides [5] was taken as 10 mg/kg. The time for complete removal of karbophos from the soil is 8 minutes, that is, the method of microwave heating is quite effective for decomposition of karbophos.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the efficiency of microwave heating of soils

Bondarenko,

Boshkova

2023

TAPR

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One of the innovative directions of heat treatment of soil in the technologies of decontamination from pesticides, oil products and disinfection is heating in a microwave electromagnetic field. Numerical studies testify to the effectiveness of the microwave treatment method. This is due to the peculiarities of the interaction of the microwave field with dielectric materials. Unique effects arise, such as the possibility of local heating, volume heating of the material, unidirectionality of pressure and humidity gradients. This contributes to the intensification of transfer processes and the possibility of energy savings. However, the challenge at present is to determine the processing regimes, including load mass, specific microwave field power, electric field strength, material layer thickness, and processing time, under which the microwave method will be energy efficient. Conducting multifactorial experimental studies allows determining the conditions of energy feasibility of microwave soil treatment. Therefore, the object of research is the process of heating a dense layer of soil under the action of a microwave electromagnetic field. The results of studies on the effect of microwave treatment of soil contaminated with organophosphorus pesticides, contaminated with petroleum products, and under what conditions the qualitative effect was obtained, as well as the results of the effect of the microwave field on the pathogenic microflora of the soil used for growing plants, were considered. The high quality of implementation of soil treatment technologies is determined. Energy efficiency was determined on the basis of data on temperature and moisture content, analysis of thermograms of microwave heating of chernozem and clay soil, analysis of the influence of material layer thickness, influence of dielectric properties and power of the microwave field. According to the results of thermal calculations, the values of the efficiency of the microwave chamber and the intensity of the electric field were determined, which are recommended as the basis for scaling in order to transfer the experimental results to industrial installations. During the research, specific experimental methods of research under microwave heating conditions, analytical methods of thermal calculations, developed by the authors of the experimental research methodology were used. Experimental studies were carried out on the installation created by the authors. The results of the research are intended for the wide implementation into practice of technological calculations of microwave chambers for heat treatment of soils, intensification of disinfection processes under the conditions of energy efficiency of the transformation of the energy of the microwave field into the internal energy of the soil.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the efficiency of microwave heating of soils

Bondarenko,

Boshkova

2023

TAPR

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“…Our studies in microwave-assisted chemistry have consistently focused on how and what particular features of microwave radiation impact syntheses, in general, and organic syntheses involving intermolecular reactions, in particular. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] In this regard, in a previous study we investigated specic (nonthermal) microwave effects that might have an impact on organic syntheses by examining the synthesis of monoglycerylcetyldimethylammonium chloride from 3-chloro-1,2propanediol and N,N-dimethylhexadecylamine in 2-propanol solvent, and under solvent-free conditions. 18 No effects were evident in homogeneous 2-propanol media under temperature conditions identical to conventional heating; however, heterogeneous solvent-free conditions brought out non-insignicant specic microwave effects as evidenced by variant product yields: 62% by microwave irradiation versus 47% by conventional heating (typically using an oil bath).…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted organic syntheses: microwave effect on intramolecular reactions – the Claisen rearrangement of allylphenyl ether and 1-allyloxy-4-methoxybenzene

et al. 2015

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“…Previous studies have shown that Poly-Aromatic Hydrocarbons (PAHs) could be efficiently removed from two contaminated soils samples [15] and Horikoshi et al [18] showed that significant removal of trichloroethylene was possible from a model soil material. The levels of organic removal depend on the electric field intensity generated within the microwave applicator, and the subsequent power density within the heated phase(s) of the soil.…”

mentioning

confidence: 99%

Development and evaluation of a continuous microwave processing system for hydrocarbon removal from solids

Buttress

Binner

et al. 2016

Chemical Engineering Journal

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A continuous conveyor-belt processing concept using microwave heating was developed and evaluated. Four hydrocarbon-contaminated soils were used as model feedstocks, and the degree of organic removal was assessed against the power and energy input to the process. The findings of this study at scale (150kg/h) are in direct agreement with data obtained in batch laboratory scale experiments, and show that microwave heating processes are fundamentally scalable. It is shown that there is a trade-off between the efficiency of organic removal and the power distribution, and applying the power in a single stage was found to be 20-30% more energy efficient but the overall degree of organic removal is limited to 60%. 75% removal was possible using two processing steps in series, but the organic removal is ultimately limited by the amount of power that can be safely and reliably delivered to the process material. The concept presented in this work is feasible when 75% organic removal is sufficient, and could form a viable industrial-scale process based on the findings of this study.

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Influence of Humidity and of the Electric and Magnetic Microwave Radiation Fields on the Remediation of TCE-contaminated Natural Sandy Soils

Cited by 8 publications

References 15 publications

Evaluation of the efficiency of microwave heating of soils

Evaluation of the efficiency of microwave heating of soils

Microwave-assisted organic syntheses: microwave effect on intramolecular reactions – the Claisen rearrangement of allylphenyl ether and 1-allyloxy-4-methoxybenzene

Development and evaluation of a continuous microwave processing system for hydrocarbon removal from solids

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