Both engine modifications and specific control technologies have been used to control motor vehicle emissions. These have included engine operation and design factors, engine-based control systems and exhaust gas control systems. Early control efforts were directed to reducing blow-by gases, evaporative emissions and HCs and CO from exhaust systems. 1. Engine Operation and Design: Significant reductions in emissions of CO, [...]
In this article we will discuss about the estimation of particulate and gaseous pollutants in air. Estimating the Particulate Concentration in Air: The selection of equipment or method for sampling of particulate pollutants is based on the size of particulates to be sampled. If the size is greater than 10 microns, sedimentation based method may be adopted and the size [...]
The procedure for analysis of sulphur dioxide, sulphation rate, hydrogen sulphide, oxides of nitrogen, oxidants, fluorides, and carbon monoxide are explained below. These methods have been adopted by the Bureau of Indian Standards, New Delhi (India), which are given in IS: 5182. (They are reproduced briefly with kind permission of Bureau of Indian standards). Estimation of Sulphur Dioxide from Atmospheric [...]