In order to clarify the possibility of NO3− being one of concomitants for acid rain, we have measured pH, electric conductivity (EC) and cationic and anionic ion levels in rain water collected from three different locations in Kobe, Japan: The distances from the highway (Hanshin Highway) are 50 m at the A point, 1,500 m at the B point and 2,900 m at the C point, respectively. Significant correlations were observed between the respective NO3− and Ni2+ levels in the rain water obtained from the A and B points. Since these ions are usually included in motor vehicle exhausts, the results suggest that acidity in rain water is mainly derived from NO3− due to motor vehicles and that the levels of Ni2+ in rain water are evaluated as an indication of air pollution by motor vehicle exhausts.
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Research Article| November 01 1992
Influence of Motor Vehicle Exhausts on Chemical Components in Rainwater
Water Sci Technol (1992) 26 (9-11): 2563–2566.
A. Adachi, T. Kobayashi; Influence of Motor Vehicle Exhausts on Chemical Components in Rainwater. Water Sci Technol 1 November 1992; 26 (9-11): 2563–2566. doi: https://doi.org/10.2166/wst.1992.0788
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