Abstract
Nuclear analytical technique instrumental neutron activation analysis was employed for the multielemental analysis of sediments collected from Cisadane estuary. This analytical technique provides concentration of 20 elementswhich consist of heavy metals and rare earth elements simultaneously. Two sediments cores were collected using core sampler for determining the distribution of all elements in the depth profiles of sediments. Sediment cores were subdivided into 2 cm increment, dried and sent to reactor for irradiation using thermal flux of ?1013 neutrons.cm-2.s-1 for 20 minutes in Research Reactor Siwabessy, National Nuclear Energy Agency (BATAN), Serpong. Irradiated samples were measured using a multichannel analyzer (MCA) gamma spectrometer coupled with high purity germanium detector. Analysis of particle size was done since uptake of heavy metals by sediments is particle-size dependent. The results are presented and discussed.
Highlights
Economical development of a country’s or region’s economy inevitably result increased environmental pollution
The objective of this study is to investigate the use of this nuclear analytical technique in sediment analysis and to assess their applicability, accuracies and the limit of quantitative determination (LQD)
The effective applicability of the INAA for environmental marine samples has been proven by the results of numerous studies
Summary
Economical development of a country’s or region’s economy inevitably result increased environmental pollution. The assessment of contamination levels in aquatic ecosystems can be done by analyzing water, sediments or living organism. It is more beneficial to assess the pollution by analyzing either sediments or biota organisms. Biomonitoring has its associated problems and so analysis of sediments is often the optimum method. Bottom sediment serves as a reservoir for heavy metals and deserve special consideration in the design of aquatic pollution research studies. An undisturbed sediment column contains a historical record of geochemical characteristics in the watershed. If a sufficiently large and stable sediment sink can be located and studied, it will allow an investigator to evaluate geochemical changes over time, and possibly, to establish baseline levels against which current conditions can be compared and contrasted
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