Author:Zheng, Haitao; Mathe, MkhuluDate:Sep 2023Ultrasonic cavitation is a phenomenon that occurs when high-frequency sound waves are introduced into a liquid medium, causing the formation and collapse of small bubbles within the liquid. These bubbles generate high-energy shock waves that ...Read more
Author:Hietkamp, SDate:Jun 2006Without legislation pollution is regarded as an “externality” high levels of air and water pollution in Europe resulted increasing industrialisation. Disasters happened e.g. London smog in the 1950 and the first clean air legislation was ...Read more