Sonochimia in epurarea energo-intensiva a apelor (sonochemistry in energo-intensive water and wastewater treatment)

Abstract

This volume proposes two main scientific directions: an overview on the ultrasonication process, comprising basic knowledge and principles for understanding how this process works and an assessment on possibilities of using ultrasounds- especially in energo-intensive treatment of water and wastewater. The book is structured on four chapters, with focus on the chemistry of ultrasounds and its applications in environmental protection, as a possible efficient treatment for pollutants removal from water and wastewater. The environmental issues of water resources usage and pollution and especially of wastewater production are briefly discussed in the first chapter, which offers the starting point of this scientific approach and underlines the necessity of finding new methods and treatments in order to overcome the technological and economical constraints of water and wastewater treatment. The second chapter brings into attention 3 important aspects related to the physics of ultrasounds: the ways of ultrasounds emission, the physical laws that describe oscillations and acoustic waves and specific measures that intervene in the ultrasonication process. The classification of devices that are able to emit ultrasounds, with special references on ultrasonic transducers, short descriptions about the way of functioning and also about the materials that can be used for producing them are specified in this chapter. Also, the equations that describe the acoustic waves and, in particular ultrasonic waves, are explained and the most important phenomenon like sounds travelling through different media and the extinction and absorption of ultrasonic waves are mentioned. The following chapter, which is also the ...