Sonochemical treatment of benzene/toluene contaminated wastewater

Thoma, Greg; Gleason, Michael; Popov, V. E.

doi:10.1002/ep.670170313

Cited by 21 publications

(12 citation statements)

References 24 publications

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“…In recent years, studies suggest that volatile contaminants could be quickly destroyed by ultrasonic irradiation [9][10][11]. However, there is a lack of research related to the use of high-frequency ultrasound for pyridine degradation in pyridine aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Successive advanced oxidation of pyridine by ultrasonic irradiation: effect of additives and kinetic study

El-Sayed

2015

Desalination and Water Treatment

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To cite this article: M.A. Elsayed (2015) Successive advanced oxidation of pyridine by ultrasonic irradiation: effect of additives and kinetic study, Desalination and Water Treatment, 53:1, 57-65, A B S T R A C TPyridine has received considerable attention from environmental scientists and engineers, due to its undesirable effect in the water environment. Pyridine contaminated wastewater presents a great threat on water resources safety. In this research, the degradation and advanced oxidation of pyridine in aqueous solution by ultrasonic waves were studied under various process variables including different initial concentration, H 2 O 2 , NaCl, and Fenton reagent. The results show that the degradation efficiency of pyridine decreases with the increasing of the initial concentration of pyridine. The removal rates of pyridine decreased from 52 to 15% with increasing the initial concentration from 10 to 100 mg/L. In the concentration range studied, the amount of H 2 O 2 and NaCl added has positive contribution on the degradation of pyridine. The removal effect of ultrasound and Fenton is better than ultrasound or H 2 O 2 alone acting on pyridine. A possible degradation pathway for pyridine was also proposed. In the end, it could be proposed that ultrasonic irradiation was an effective method for the removal of pyridine from wastewater.

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Section: Introductionmentioning

confidence: 99%

Successive advanced oxidation of pyridine by ultrasonic irradiation: effect of additives and kinetic study

El-Sayed

2015

Desalination and Water Treatment

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“…Вступ. Кавітація та її комбінації з іншими методами -основа ефективних технологій очищення стічних вод від дисперсних твердих частинок [1,2] та шкідливих органічних сполук [3][4][5][6][7][8][9][10]. Так, встановлено, що максимальної швидкості флотації кальцію оксалату, який утворювався внаслідок хімічної взаємодії натрію оксалату (протрава під час дублення шкіри) із кавітаційно активованими дисперсними частинками суспензії кальцію гідроксиду, досягали за тривалості кавітаційного оброблення 600…900 с і тиску на вході у гідродинамічний кавітатор 0,3…0,4 МПа [1].…”

Section: кавітація у комбінованих технологіях очищення стічних вод віunclassified

Кавітація У Комбінованих Технологіях Очищення Стічних Вод Від Толуену

Сухацький¹,

Знак²,

Капацила³

et al. 2020

Вісник ЧДТУ

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“…One system that has been used for large-scale applications of sonochemistry is the Dual Frequency Reactor (DFR, Advanced Sonic Processing Systems) which has also been employed in environmental applications for the degradation of organic contaminants in wastewater [15]. The DFR consists of opposing plates operating at 16 and 20 kHz.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Power Ultrasonic Effects on Algae Cells at a Small Pilot Scale

Mason

2017

Water

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It has been recognized for several years that power ultrasound can effectively inactivate algae cells at a laboratory scale. However, although ultrasonic inactivation shows great potential, there are few reports of its use when applied on a large scale. In this study, we have investigated the uses of two types of ultrasonic equipment at a small and medium laboratory scale for the control of algae blooms which are commercially available in similar configurations for industrial scale operation. The following equipment was tested using cultured algae suspension: (a) Dual Frequency Reactor (DFR) operating on 1 L in batch mode and 3.5 L in recirculating mode with two resonating plates at different frequencies of 16 and 20 kHz (Advanced Sonic Processing Systems, USA); (b) Sonolator operating in a flow mode treating 5 L using hydrodynamic cavitation (Sonic Corporation, Stanford, CA, USA). The most effective inactivation was obtained using the DFR in batch mode at 60% power setting for 10 min which resulted in a reduction of 60% of the original concentration (measured using optical density OD). In a recirculating loop mode, the treatment of 3.5 L algae suspension with a DFR for 15 min resulted in a reduction of 46% (OD). Ultrasonic treatment of 5 L suspension in a recirculating loop using the Sonolator over 5 h resulted in a reduction of 30% (OD). This study is the first to explore the use of two commercially available ultrasonic systems (DFR and Sonolator) both capable of direct scale-up to industrial levels for the control of algae. It demonstrates that sonication in a recirculating process has the potential to be effective in the treatment of algal cells on a large scale.

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Sonochemical treatment of benzene/toluene contaminated wastewater

Abstract: Studies of the destruction of benzene and toluene in water w e unusing ultrasonic irrdhtion in aparallelplate NearField Acoustic Processor (NAP

Cited by 21 publications

References 24 publications

Successive advanced oxidation of pyridine by ultrasonic irradiation: effect of additives and kinetic study

Successive advanced oxidation of pyridine by ultrasonic irradiation: effect of additives and kinetic study

Кавітація У Комбінованих Технологіях Очищення Стічних Вод Від Толуену

Evaluation of Power Ultrasonic Effects on Algae Cells at a Small Pilot Scale

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