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  • 1 Tokyo Metropolitan University Department of Chemistry Fukasawa, Setagaya-ku Tokyo Japan
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Environmental effects on plants caused by geothermal resource development were studied. Neutron activation method was found most suitable for this kind of multi-element analysis, and 24 elements could be identified and determined without any chemical separation. When the amounts of chemical elements detected in plants were plotted against the distance from the source well, clear correlations sould be observed for Na, Cl, Rb, Cs, As and Sb. Those turned out to be the elements especially concentrated in the geothermal hot water. From the present studies it was concluded that plants growing within the radius of 300 to 400 meters from the source well were affected by chemical pollutants carried over by mist particles.