Analysis of  137 Cs Radionuclide Content in Sediment in Musi Watershed Using Gamma Spectrometer and its Affecting Factors

T. A. Jaya; A. Mara; G. F. Amri

doi:10.17146/aij.2021.1130

Analysis of ¹³⁷Cs Radionuclide Content in Sediment in Musi Watershed Using Gamma Spectrometer and its Affecting Factors

T. A. Jaya, A. Mara, G. F. Amri

Abstract

The concentration of the radionuclide ¹³⁷Cs on sediment in watershed in Palembang has been analyzed. This study aims to determine the influence of sampling location and the water quality indicators of water pH, sediment pH, conductivity, turbidity, and sediment type on the concentration of ¹³⁷Cs and to determine the distribution pattern of ¹³⁷Cs in sediments. Sampling was conducted at seven stations spaced approximately 5 km apart, placed from the western end to the eastern end of the Musi river segment located within Palembang City.Sediment samples were prepared and their ¹³⁷Cs contents were measured with gamma spectrometry. The results showed that their ¹³⁷Cs concentrations ranged from below MDC (minimum detectable concentration) to 1.51 Bq/kg. This was within the 1×10³ Bq/kg limit set by the quality standard. The varied and very low concentrations of ¹³⁷Cs are thought to have originated from global fallout. The location point of sampling affects the concentration of radionuclide ¹³⁷Cs while the characteristics of water quality are do not. The ¹³⁷Cs concentration spread pattern in Musi sediment is influenced by tidal currents and river morphology.

Keywords

Radionuclide 137Cs, Gamma Spectrometer, Sediment

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DOI: https://doi.org/10.17146/aij.2021.1130