The Effect of SO2 and NO2 from Transportation and Stationary Emissions Sources to SO42− and NO3− in Rain Water in Semarang

Semarang is the central of economic growth in the Central Java; grow as the city of industry, trade, services and education. One of the impacts of urban development is air pollution and acid rain. This study aims to analyse the impact of emissions of SO2 and NO2 emissions from stationary sources and mobile sources of the content of SO42-and NO3− in the rain. Research method using Gaussian distribution models to determine the contribution of SO2 and NO2 emissions from 98 industrial stacks and transport activity of 43 major roads in the city of Semarang and its correlation with SO42-and NO3− in the rain at points monitored. Location of monitoring conducted at 13 monitoring points includes residential areas, industrial areas and areas with dense transport. Number of samples rainwater 131 samples during the period February - May 2013. SO2 emissions from stationary sources and transportation caused 1.1 to 1.9%. Whereas NO2 impact of emission sources in Semarang on nitrates in rain water was 27.1% of rain events during the period January - June 2013.