scholarly journals Study on the Process of Degradation of Phenolic Compounds in Water by Slot Ultrasonic

2019 ◽  
Vol 118 ◽  
pp. 03050 ◽  
Author(s):  
Yong-guang Bi ◽  
Yu-hong Zheng ◽  
Shao-qi Zhou
Keyword(s):  
Wastewater Treatment ◽  
Phenolic Compounds ◽  
Industrial Wastewater ◽  
Degradation Rate ◽  
Sample Solution ◽  
Ultrasonic Power ◽  
Test Results ◽  
Industrial Wastewater Treatment ◽  
Initial Concentration ◽  
Ultrasonic Degradation

The test results show that the degradation rate of phenol decreases with the increase of ultrasonic power. The effect of degradation increases by studying the effects of the power of the ultrasonic, the initial concentration of the phenol sample solution, and the pH of the phenol sample solution. The degradation rate of phenol increases first and then decreases with the increase of initial concentration, and the degradation rate of phenol is up to 31.86%. The ultrasonic degradation technology can provide reference for the application of industrial wastewater treatment.

Ultrasonic degradation of 1-H-benzotriazole in water

2014 ◽  
Vol 70 (1) ◽  
pp. 152-159 ◽  
Author(s):  
Henry Zúñiga-Benítez ◽  
Jafar Soltan ◽  
Gustavo Peñuela
Keyword(s):  
Degradation Rate ◽  
Reaction Medium ◽  
Pollutant Removal ◽  
Bulk Solution ◽  
Interfacial Region ◽  
Oh Radicals ◽  
Ultrasonic Power ◽  
Bubble Liquid ◽  
Initial Concentration ◽  
Ultrasonic Degradation

This paper reports on the effect of different parameters of ultrasonic power, pollutant initial concentration, pH and the presence of co-existing chemical species (oxygen, nitrogen, ozone, and radical scavengers) on the ultrasonic degradation of the endocrine disruptor 1-H-benzotriazole. Increasing the 1-H-benzotriazole initial concentration from 41.97 to 167.88 μM increased the pollutant degradation rate by 40%. Likewise, a high applied ultrasonic power enhanced the extent of 1-H-benzotriazole removal and its initial degradation rate, which was accelerated in the presence of ozone and oxygen, but inhibited by nitrogen. The most favorable pH for the ultrasonic degradation was acidic media, reaching ∼90% pollutant removal in 2 h. The hydroxyl free radical concentration in the reaction medium was proportional to the ultrasound power and the irradiation time. Kinetic models based on a Langmuir-type mechanism were used to predict the pollutant sonochemical degradation. It was concluded that degradation takes place at both the bubble–liquid interfacial region and in the bulk solution, and OH radicals were the main species responsible for the reaction. Hydroxyl free radicals were generated by water pyrolysis and then diffused into the interfacial region and the bulk solution where most of the solute molecules were present.

APPLICATION OF THE FLOCCULATION PROCESS IN THE INDUSTRIAL WASTEWATER TREATMENT

2016 ◽  
Vol 15 (3) ◽  
pp. 521-526
Author(s):  
Narcis Barsan ◽  
Mariana Turcu ◽  
Emilian Mo.negu.u ◽  
Mihaela Dascalu ◽  
Dana Chitimus ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Industrial Wastewater Treatment ◽  
Flocculation Process
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