Evaluation of Radionuclide Concentration in Suspended Particulate Matter from Two Quarry Sites in Nigeria

Evaluation of Radionuclide contents suspended particulate matter from two quarry sites in Nigeria, have been carried out using High Volume air sampler and Gamma ray spectrometer NaI (Tl) Detector. The results obtained showed the mean value for 226 Ra, 232Th 40k Ishiagu sampleswere 2.76, 1.57 5.29 Bq/Kg respectively while that Okpella 1.84, 2.21 6.2 Bq/kg respectively. values were higher than their control but lower world recommended safe values. are slightly sites. This could be due to different geological constituents other mining activities going on at might contributed slight change. All radiological health risk parameter estimated within as by UNSCEAR. Comparison with similar works shows positive correlation. We therefore conclude inhalable does not constitute immediate hazard though precaution should taken avoid long term accumulation can lead stochastic risk.