Aqueous sonolytic decomposition of polycyclic aromatic hydrocarbons in the presence of additional dissolved species

Laughrey, Zachary R.; Bear, Erin; Jones, Ronald D.; Tarr, Matthew A.

doi:10.1016/s1350-4177(00)00080-8

Cited by 61 publications

(45 citation statements)

References 17 publications

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“…25 After preparing the test solution, experiments were carried out using 5 or 10 daphnids introduced into the test vessels. These vessels had 100 mL effective volume at 7-8 pH, providing a minimum DO concentration of 6 mg L −1 at an ambient temperature of [20][21][22][23][24][25] • C. …”

Section: Daphnia Magna Toxicity Testmentioning

confidence: 99%

“…Some work states that PAHs are (i) oxidized by means of H o , OH o and OOH o (hydrogen, hydroxyl and hydroperoxyl radicals), 6,17 whereas other studies argue that (ii) a pyrolytic process can occur 18,19 and finally that (iii) both processes are possible. 20,21 The first process is evidenced by the identification of hydroxylated byproducts. These radicals can result in the destruction of solutes containing organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

“…Wheat and Tumeo 17 studied the sonochemical removal of phenanthrene and biphenyl in aerated aqueous solutions in the presence of Fe 3+ ions at a frequency of 32 kHz and a power of 560 W after 90 min. In further studies, Taylor et al 18 and Laughrey et al 20 studied the sonochemical removal of anthracene, phenanthrene and pyrene at 20 kHz, with emphasis on the effect of purging gases (i.e. nitrogen and oxygen) on the kinetics of PAHs degradation at frequencies and powers varying between 25 and 32 kHz and 220-560 W, respectively, after 30-180 min sonication.…”

Section: Introductionmentioning

confidence: 99%

“…The bubbles contain more vapor and consequently reduce the maximum temperature obtained during bubble collapse.In addition, increased temperatures probably encourage degassing of the liquid phase, thus reducing the number of gas nuclei available for bubble formation. 6 In the study by Laughrey et al 20 …”

mentioning

confidence: 99%

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Effect of sonication assisted by titanium dioxide and ferrous ions on polyaromatic hydrocarbons (PAHs) and toxicity removals from a petrochemical industry wastewater in Turkey

Sponza

Özteki̇n

2010

J of Chemical Tech & Biotech

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BACKGROUND: In Izmir (Turkey) polyaromatic hydracarbon (PAH) removal efficiencies are low in petrochemical industry aerobic biological wastewater treatment plants because bacteria are not able to overcome the inhibition of these toxic and refractory organics. In order to increase PAHs removal, sonication process was chosen among other advanced treatment processes include sonication processes. The effects of ambient conditions, increasing sonication time, sonication temperature, TiO 2 and Fe

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Section: Daphnia Magna Toxicity Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of sonication assisted by titanium dioxide and ferrous ions on polyaromatic hydrocarbons (PAHs) and toxicity removals from a petrochemical industry wastewater in Turkey

Sponza

Özteki̇n

2010

J of Chemical Tech & Biotech

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“…Although intensive research, the mechanisms by which electromagnetic fields act on water are still a controversial issue [5]. Extremely low frequency electromagnetic fields have significant and lasting effects on liquid water [6].…”

Section: Analysis Of Scientific Workmentioning

confidence: 99%

Сhange of physical and chemical parameters of the liquid binary systems by alternating impulses of pressure

Dubovkina¹

2017

Ukr. food j.

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Keywords:Water Ethanol Mixture Pressure Impulse Introduction. It were conducted the researches with a purpose to determine the impact of non-reagent method, namely alternating impulses of pressure on the parameters of water-ethanol mixtures in a wide range of concentrations.Materials and methods. The methods of direct potentiometry (ionometry) were used for the researches. Experimental investigations of liquid samples were carried out with use laboratory measurement devices: pH-metermillivoltmeter pH-150 M and oximeter EZODO PDO-408.Results and discussion. At influence of alternating impulses of pressure in liquid binary systems such as water systems and water-ethanol mixtures occurs intensive deoxygenating, decrease in quantity of the dissolved oxygen in water and water-ethanol mixtures in comparison with the initial maintenance occurs practically on 50-55 %.During researches increases рН of the distilled water on 13% have been established, thus the hydrogen potential of the water prepared on technology of the distillery has raised on 14-14,5%.A value of redox potential in the course of processing by alternating impulses of pressure depending on processing time decreases on 20-60%.The change of physical and chemical properties and parameters of water systems has been established at processing application high-frequency oscillation which it is possible to explain change of reactionary ability, owing to initiation of carrying over of a proton in associated liquids such as water, aliphatic alcohols, water-ethanol mixtures with different percentage of ethanol and formation of a grid of hydrogen bonds which in turn influences the structural organisation and a structure.Conclusions. A water and water-ethanol mixtures treatment by nonchemical reagentless method in rotarypulsating devices can greatly reduce the duration of the process of mixing mode, reduce power consumption, increase capacity and replace the batch process for the continuous mixing.

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Sonochemical Remediation of Pollutants in Soils and Sediments

Fagan

2019

Encyclopedia of Water

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Ultrasonic treatment serves as an alternative and/or complementary remediation technology for contaminated soils and sediments in comparison to traditional methods, such as dredging and in situ capping. Ultrasonic waves of alternating rarefaction and compression cycles create cavitation bubbles over the course of microseconds. Cavitational collapse produces enormous temperatures and pressures that initiate thermolysis of water and subsequent radical oxidation. Physical effects of ultrasound increase mass transfer rates, whether it be via desorption/dissolution of contaminants or solute transport in porous media. Both of these processes are integral in remediation. Desorption and dissolution ensure that contaminants are available for reaction in the aqueous phase. Increased solute transport by ultrasound enhances amendment delivery to contaminated sites. The purpose of this article is to describe both the potential for and challenges of utilizing ultrasound as a remediation technology. Much of this knowledge has been laid by the literature exploring the sonochemical effects on pollutants in bench‐scale sediment slurries. Both bench‐scale ultrasonic studies on remediation of contaminated soils and sediments and enhanced oil recovery using ultrasound have provided both mechanistic understandings and insights for pilot‐scale systems. Although challenges exist in scaled‐up systems, ultrasound is a multifunctional treatment technology with unique features compared to other remediation technologies.

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Aqueous sonolytic decomposition of polycyclic aromatic hydrocarbons in the presence of additional dissolved species

Cited by 61 publications

References 17 publications

Effect of sonication assisted by titanium dioxide and ferrous ions on polyaromatic hydrocarbons (PAHs) and toxicity removals from a petrochemical industry wastewater in Turkey

Effect of sonication assisted by titanium dioxide and ferrous ions on polyaromatic hydrocarbons (PAHs) and toxicity removals from a petrochemical industry wastewater in Turkey

Сhange of physical and chemical parameters of the liquid binary systems by alternating impulses of pressure

Sonochemical Remediation of Pollutants in Soils and Sediments

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