Neutron activation analysis of the Mahoning River water using californium - 252

Abstract

This investigation deals with determination of the neutron flux of 10 mg of californium-252 source and its application to determine certain trace elements in the Mahoning River system. It has been shown that the system provides a quick, accurate, and inexpensive method of analysis, both qualitative and quantitative, for four elements. The limitation of the number of elements detected was the result of a low resolution detector system, 2 x 2 NaI(Tl) crystal. Preliminary work of a high resolution Ge(Li) detector has demonstrated that many more elements can be detected. The following were the elements detected. Elements Variation in Concentration Sodium 26.11 to 67.94 ppm Chlorine 31.14 to 57.13 ppm Manganese .07 to 7.29 ppm Copper .78 to 1.73 ppm

The change in the manganese and copper concentrations is due to the large and different industries along the river. The variations of sodium and chlorine can be largely accounted for by the sewage treatment plants in the region.

To make a meaningful· comparison as to the source of these elements from the industrial and sewage plant effluent, a detailed study above and below each major source of effluent must be made using the Ge(Li) detector.