Abstract Quartz crystals are found in nature. It is believed that these eco‐friendly and known for healing, decoration, gem therapy. However, there no scientific evidence of such effects, except it a piezoelectric material. The piezocatalytic effect viewed as having significant potential tackling environmental challenges water cleaning. performance was examined reported few dyes degradation. pu...

Remediation of pesticide-polluted soil is particularly challenging when pesticides in soil are aged and a mixture of pesticides is present. Application of zerovalent iron (Fe(0)) was investigated to accelerate the degradation of HCHs (alpha-, beta-, gamma- and delta-hexachlorocyclohexane) and DDX (DDT, DDE and DDD) in the soil from a former organochlorine pesticide manufacturing plant. Ultrason...

The effect of repeated heating process on edible oils namely, sesame oil (SO), sunflower oil (SFO) and palm oil (PO) with and without antioxidant, tertiary butyl hydroquinone (TBHQ) have been evaluated using ultrasonic velocity. The changes in physico-chemical properties of edible oils has been studied during repeated heating at 180 ± 5oC for 4 hrs/day and for 4 days. The effect of antioxidant,...

The measurement of acoustic nonlinear response is known as a promising technique to characterize material micro-damages. In this paper, nonlinear ultrasonic approach is used to characterize the evolution of fatigue induced micro-cracks in polymer bonded explosives. The variations of acoustic nonlinearity with respect to fatigue cycles in the specimens are obtained in this investigation. The pre...

The effect of ultrasonic irradiation on the dissociation of antigen-antibody complexes was studied. Among three frequencies tested, 28 kHz ultrasound gave a relatively high percent dissociation with the lowest decrease of immune reactivity. When dissolved antigen-antibody complexes were exposed to the ultrasonic irradiation no dissociation was observed, while antigenantibody complexes were sign...

The effects of ultrasonic conditions and physicochemical properties on the synergistic degradation in synthetic solution were investigated. A wide range of ultrasound frequencies, including 35, 170, 300, 500 and 700 kHz, and ultrasonic power densities, including 11.3, 22.5 and 31.5 W/L were used. It was revealed that the physical effect of ultrasound plays a major role in synergistic mechanism ...

The sonochemical acceleration of bleaching of Rhodamine B by sodium hypochlorite has been studied using ultrasound intensities in the range 0-7 W cm(-2). Using a 20 kHz ultrasonic horn, it was shown that ultrasound could significantly shorten the treatment time and/or the concentration of hypochlorite required for the reaction. A number of intermediate species formed during the reaction have be...

In this work firstly Fe3O4 nanoparticles were synthesized via a sono-chemical method. At the second step magnesium hydroxide shell was synthesized on the magnetite-core under ultrasonic waves. For preparation Fe3O4-MgO the product was calcinated at 400 ºC for 2h. Properties of the product were examined by X-ray diffraction pattern (XRD), scanning electron microscope (SEM) and Fourier transform ...

In this paper, the degradation of Congo red (CR) as a dye was investigated by a new synthetic photocatalyst. The synthesis was done through the intercalation of CdS in the layers of titanate (K2Ti4O9) by the assistance of ultrasound. The photocatalyst was prepared via ion-exchange reaction and sulfuration processes in the presence of ultrasonic irradiation. The samples were characterized by the...