Wastewater treatment by means of advanced oxidation processes based on cavitation – A review

Gągol, Michał; Przyjazny, Andrzej; Boczkaj, Grzegorz

doi:10.1016/j.cej.2018.01.049

Cited by 627 publications

(220 citation statements)

References 131 publications

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“…To the best of our knowledge, there are no systematic experimental works in the open sources. Ultrasonic cavitation neutralization processes for a few chemicals are reported in the literature and show property behaviours/trends that are similar to those in this research study, though there are some differences between them and the current research work in terms of the research nature and operational conditions. This clearly implies the rationality and correct trends of the results of this experimental work.…”

Section: Resultsmentioning

confidence: 99%

“…The rapid growth of applications of ultrasonic cavitation can be particularly seen in pharmaceutical industries, cosmetics industries, and chemical technologies (e.g., in the health and biomedicine sectors) . Currently, there are several research studies demonstrating the advantages of ultrasonic cavitation employed in emulsion processing, wastewater treatment, lubricant, esterification process, and biodiesel production …”

Section: Introductionmentioning

confidence: 99%

“…Another concern is the noise emissions of ultrasonic transducers while employing such reactors on an industrial scale. However, there are some advantages to the cavitation technique, such as low operational costs, reduced mass transfer resistance, high efficiency in treatment of both basic and acidic solutions, and fairly easy procedure for the scale‐up, when compared to the available commercial methods of wastewater treatment …”

Section: Introductionmentioning

confidence: 99%

“…There are several industries (e.g., food, pharmaceutical, and mining) across the world that are struggling to find efficient ways to improve the quality of their products/chemicals . It should be noted that the quality of chemical products might considerably affect the life of humans, plants, and animals in terms of health, safety, and environmental prospects.…”

Section: Introductionmentioning

confidence: 99%

“…Different salts consisting of potassium and acetate ions are usually present in the products. These ions adversely affect PEG properties . Hence, finding effective strategies, such as ultrasonic cavitation, is vital to improve product quality.…”

Section: Introductionmentioning

confidence: 99%

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Effects of ultrasonic cavitation on neutralization process of low molecular weight polyethylene glycol

et al. 2018

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In recent decades, ultrasound has been broadly employed in different applications, particularly in the chemical industry. Ultrasound enhances chemical reactions in a solution via generation of cavitation microbubbles. It improves mass transfer rate and kinetic rate of targeted systems under various process conditions. In polyethylene glycol (PEG) production, the neutralization reaction is generally carried out by employing a mechanical stirring operation. However, this process produces a soluble salt containing potassium and acetate ions, which are known to appreciably manipulate/alter the properties of PEG. In this paper, ultrasound influence is initially analyzed through the neutralization of deionized water. This study then focuses on the neutralization of PEG using ultrasonic cavitation and its impact on the properties of PEG. The ultrasonic cavitation unit employed in this research is a COLE‐Parmer® 500 W & 20 kHz with an ultrasonic probe. To investigate the efficiency of the ultrasonic cavitation reactor and analyze the important aspects of the implemented method, the concentration of soluble salts and conductivity of PEG neutralized by the ultrasonic cavitation method are measured and compared with those of the commercial PEG prepared by the mechanical stirring methodology. The results reveal that the neutralization reaction via the ultrasonic cavitation lowers the conductivity and concentrations of potassium and acetate ions, compared to the traditional stirring methods. It is also concluded that the minimum conductivity and the minimum content of potassium and acetate ions are achieved at 30 % power and a reaction time of 5 min. This study promises the efficient utilization of the ultrasonic cavitation in the industrial sectors, particularly in pharmaceutical industries.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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