Reduction of Air and Noise Pollution by Aqua Silencer- A Review

Abstract

All across the world, people are facing a wealth of new and challenging environmental
problems everyday. Nowadays, more importance is being given to environmental issues like air pollution and noise
pollution. The major pollutants contribute by factories is sulphur-dioxide and from automobiles are carbon monoxide
(CO), unburned hydrocarbon (UBHC), oxides of nitrogen (Nox) and lead. Automobiles are not only source of air
pollution, other sources such as electric power generating stations, industrial and domestic fuel consumption, mining
operations, industrial processing etc. also provide contamination of our environment heavily. Noise pollution is the
disturbing or excessive noise that may harm the activity or balance of human life. The main source of outdoor noise
worldwide is mainly caused by machines and transportation systems, motor vehicles, aircraft, and trains. An aqua
silencer is an attempt in this direction to reduce air and noise pollution. The aqua silencer reduces noise pollution
because, the sound produced in under water having less amplitude than in open atmosphere. It happens because of in
water molecules are converted into low mass bubble which lowers amplitude of emission gases and lower the sound
level. The charcoal layer which is pasted over perforated tube. The emission of polluted gases can be controlled by
using the activated charcoal and highly porous extra free valences due to have high absorption capacity of this layer.