scholarly journals Low frequency ultrasound-assisted leaching of sewage sludge for toxic metal removal, dewatering and fertilizing properties preservation

2013 ◽  
Vol 20 (1) ◽  
pp. 109-117 ◽  
Author(s):  
Samuel de La Rochebrochard ◽  
Emmanuel Naffrechoux ◽  
Patrick Drogui ◽  
Guy Mercier ◽  
Jean-François Blais
Keyword(s):  
Sewage Sludge ◽  
Metal Removal ◽  
Low Frequency ◽  
Toxic Metal ◽  
Low Frequency Ultrasound ◽  
Ultrasound Assisted ◽  
Frequency Ultrasound

scholarly journals Magnetically recyclable CoFe2O4/ZnO nanocatalysts for the efficient catalytic degradation of Acid Blue 113 under ambient conditions

RSC Advances ◽  
2020 ◽  
Vol 10 (28) ◽  
pp. 16473-16480 ◽  
Author(s):  
S. Krishna ◽  
P. Sathishkumar ◽  
N. Pugazhenthiran ◽  
Kiros Guesh ◽  
R. V. Mangalaraja ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Low Frequency ◽  
Catalytic Degradation ◽  
Ambient Conditions ◽  
Low Frequency Ultrasound ◽  
Ultrasound Assisted ◽  
Acid Blue 113 ◽  
Acid Blue ◽  
Frequency Ultrasound

CoFe2O4/ZnO magnetic nanocatalysts were synthesized using a low-frequency ultrasound-assisted technique to enhance the optical, morphological, magnetic and catalytic properties of ZnO.

Low frequency ultrasound assisted synthesis of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) perovskite nanostructures

2015 ◽  
Vol 276 ◽  
pp. 200-203 ◽  
Author(s):  
A. Akbari-Fakhrabadi ◽  
P. Sathishkumar ◽  
K. Ramam ◽  
R. Palma ◽  
R.V. Mangalaraja
Keyword(s):  
Low Frequency ◽  
Low Frequency Ultrasound ◽  
Ultrasound Assisted ◽  
Frequency Ultrasound

Low frequency ultrasound assisted sequential and co-precipitation syntheses of nanoporous RE (Gd and Sm) doped cerium oxide

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22578-22586 ◽  
Author(s):  
Panneerselvam Sathishkumar ◽  
Ramalinga Viswanathan Mangalaraja ◽  
Thangaraj Pandiyarajan ◽  
M. A. Gracia-Pinilla ◽  
N. Escalona ◽  
...  
Keyword(s):  
Cerium Oxide ◽  
Low Frequency ◽  
Low Frequency Ultrasound ◽  
Ultrasound Assisted ◽  
Co Precipitation ◽  
Frequency Ultrasound

Cerium oxide (CeO2), Ce0.9Gd0.1O1.95 and Ce0.9Sm0.1O1.95 nanostructures were synthesized using 42 kHz ultrasound assisted sequential and co-precipitation techniques.

Fate of micropollutants during sewage sludge disintegration by low-frequency ultrasound

2015 ◽  
Vol 280 ◽  
pp. 575-587 ◽  
Author(s):  
G. Rivas Ibáñez ◽  
B. Esteban ◽  
L. Ponce-Robles ◽  
J.L. Casas López ◽  
A. Agüera ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Low Frequency ◽  
Low Frequency Ultrasound ◽  
Frequency Ultrasound

Pretreatment of Sewage Sludge by Low-frequency Ultrasound

2012 ◽  
Vol 15 (2) ◽  
Author(s):  
Basak Savun ◽  
Uwe Neis ◽  
Nilsun H. Ince ◽  
Orhan Yenigün
Keyword(s):  
Sewage Sludge ◽  
Activated Sludge ◽  
Low Frequency ◽  
Oxygen Demand ◽  
Short Wave ◽  
Waste Activated Sludge ◽  
Total Dissolved Nitrogen ◽  
Low Frequency Ultrasound ◽  
The Impact ◽  
Frequency Ultrasound

AbstractThe key point of waste activated sludge (WAS) pretreatment is to rupture the cell wall for allowing the release of intracellular matter that acts as a bioavailable substrate in anaerobic digestion processes. In this regard, ultrasonic irradiation has been one of the most effective tools owing to the unique properties of ultrasound to produce extreme conditions in heterogeneous liquids such as waste activated sludge. The present study investigates the impact of short-frequency ultrasound on disintegration, biodegradability and dewatering characteristics of sewage sludge by monitoring soluble chemical oxygen demand (sCOD), dissolved organic carbon (DOC), soluble proteins, total dissolved nitrogen, particle size and dewaterability of raw and sonicated sludge samples to optimize the operating parameters. The results showed that short wave ultrasound is a highly effective method of WAS treatment, because it provides high degrees of disintegration and biomass transfer from sludge solids to the aqueous phase, thus resulting in enhanced biodegradability.

Low-frequency ultrasound and photochromotherapy in the complex treatment of patients with chronic bacterial and viral rhinosinusitis

2020 ◽  
pp. 13-23
Author(s):  
Natalya Kornova ◽  
A. Krylov
Keyword(s):  
Chronic Rhinosinusitis ◽  
Low Frequency ◽  
Chronic Tonsillitis ◽  
Complex Treatment ◽  
Resonance Imaging ◽  
X Ray ◽  
Low Frequency Ultrasound ◽  
Viral Nature ◽  
Ig G ◽  
Frequency Ultrasound

The article presents results of a study on the effectiveness of using lowfrequency ultrasound and photochromotherapy in the complex treatment of patients with chronic bacterial and viral rhinosinusitis. The study involved 69 people aged 18 to 55 years: 39 (56.83 %) women and 30 (45.11 %) men with chronic rhinosinusitis during the period of clinical exacerbation and concomitant chronic tonsillitis without exacerbation. All patients included in the study underwent X-ray examination or computed tomography and magnetic resonance imaging of the paranasal sinuses. 100 % of the patients were examined for the presence of antibodies to Human gammaherpesvirus 4 (ELISA), had study of blood serum for IgM and IgG and test to determine the avidity of Ig G antibodies to γ-herpesviruses. The obtained data indicate the effectiveness of including low-frequency ultrasound and photochromotherapy in the complex treatment of patients with chronic rhinosinusitis and concomitant chronic tonsillitis of bacterial and viral nature without exacerbation.

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