Case study of the sonochemical decolouration of textile azo dye Reactive Black 5

Vajnhandl, Simona; Maréchal, Alenka Majcen Le

doi:10.1016/j.jhazmat.2006.07.005

Cited by 113 publications

(41 citation statements)

References 26 publications

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“…Besides, at a higher frequency, a shorter lifetime and quick collapse favor the ejection of hydroxyl radicals before they are able to recombine (Vajnhandl and Le Marechal 2007). For relatively low frequency, the number of cavitational events is increased, and bubbles have relatively more time to grow and collapse, which results in maximum size and violent collapse.…”

Section: Influence Of the Frequencymentioning

confidence: 99%

Sonochemical techniques to degrade pharmaceutical organic pollutants

2015

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Pharmaceuticals are one of the chemical groups largely used in health care, diagnosis aids, cure, treatment, and prevention of disease. Increasing production and use of pharmaceutical products has led to the entry of these products into the environment and eventual pollution. Several processes have been studied including the use of ultrasound for the removal of these pollutants from the aquatic environment. This review summarizes recent research advances dealing with the development of sonochemical technologies for the degradation of pharmaceutical organic pollutants. The review also includes the mechanism of sonochemical processes, the characteristics of irradiation sources, and the types of reactors used. Moreover, the important factors affecting the sonochemical oxidation efficiency are discussed, including the electrical power, frequency, and temperature. Finally, this paper discusses the recent applications of sonochemical processes on the degradation of pharmaceutical organic pollutants and suggests new research directions for the development of this promising technology.

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Section: Influence Of the Frequencymentioning

confidence: 99%

Sonochemical techniques to degrade pharmaceutical organic pollutants

2015

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“…All AOPs are designed to produce hydroxyl radicals that act with high-efficiency to destroy organic compounds. The most widelyapplied advanced oxidation processes (AOP) are: Kurbus et al 2003), and ultrasound (US) (Vajnhandl & Majcen Le Marechal, 2007) have several advantages such as: rapid reaction rates, small foot-print, reduction of toxicity, and complete mineralization of treated organics, no concentration of waste for further treatment (as membranes), no production of materials that require further treatment, such as 'spent carbon' from activated carbon absorption, no creation of sludge as with physical-chemical processes or biological processes (wasted biological sludge), and a nonselective pathway allows for the treatment of multiple organics, at once. On the contrary, these processes are capital-intensive and, in the case of complex chemistry, must be tailored to specific applications (Slokar & Majcen Le Marechal, 1998).…”

Section: Wastewater Treatment Processesmentioning

confidence: 99%

Textile Finishing Industry as an Important Source of Organic Pollutants

Maréchal¹,

Križanec²,

Vajnhandl³

et al. 2012

Organic Pollutants Ten Years After the Stockholm Convention - Environmental and Analytical Update

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“…Recently, these processes have found new applications in the environmental field, because of advantages in terms of operational simplicity, secondary pollutant formation and safety. Sonochemical treatment had been found to be one of the successful technologies for degradation of organic pollutants such as chlorinated aromatic and aliphatic compounds, phenolic compounds and dyes (Teo et al, 2001;Maleki et al, 2005;Vajnhandl & Marechal, 2007).…”

Section: Sonochemical Degradationmentioning

confidence: 99%