2.1. Preparation and analysis of samples
The coal-fired electricity power plant in this study is located
about 5 km west of Kapar. Fourteen sites between the power plant
and the town were chosen as the soil indicator sites, as shown in
Fig. 1, with Table 2giving the coordinates of the power plant and
sampling sites. The sampling locations were chosen based on the
possible TENORM contributions from various sources in addition
to the expected atmospheric diffusion and ash disposal from the
Kapar power plant, prevailing wind-direction informed by windrose data also being taken into account. Relevant information
concerning the probable TENORM contributions in the sampling
sites are shown in the results and discussion section. After
removing grass and other top organic material, surface soil up to
a depth of about 5 cm were sampled, obtained four times over a
Table 1
World average activity concentration (Bq/kg) of40
K,
238
U and
232
Th
in coal and coal fly ash (UNSCEAR, 1982).
Nuclides Coal Fly Ash
40
K 50 265
238
U20200 226
Ra 20 240
232
Th 20 70
Fig. 1.The map showing the location of the power plant (CPP) and the sampling points (S). The detailed coordinates are given inTable 2.
Y.M. Amin et al. / Applied Radiation and Isotopes 80 (2013) 109–116 110
period of one year to look for seasonal variation in soil contamination. In addition to the soil samples, bottom ash or slag samples
were also obtained from the power plant
2.1. Preparation and analysis of samplesThe coal-fired electricity power plant in this study is locatedabout 5 km west of Kapar. Fourteen sites between the power plantand the town were chosen as the soil indicator sites, as shown inFig. 1, with Table 2giving the coordinates of the power plant andsampling sites. The sampling locations were chosen based on thepossible TENORM contributions from various sources in additionto the expected atmospheric diffusion and ash disposal from theKapar power plant, prevailing wind-direction informed by windrose data also being taken into account. Relevant informationconcerning the probable TENORM contributions in the samplingsites are shown in the results and discussion section. Afterremoving grass and other top organic material, surface soil up toa depth of about 5 cm were sampled, obtained four times over aTable 1World average activity concentration (Bq/kg) of40K,238U and232Thin coal and coal fly ash (UNSCEAR, 1982).Nuclides Coal Fly Ash40K 50 265238U20200 226Ra 20 240232Th 20 70Fig. 1.The map showing the location of the power plant (CPP) and the sampling points (S). The detailed coordinates are given inTable 2.Y.M. Amin et al. / Applied Radiation and Isotopes 80 (2013) 109–116 110period of one year to look for seasonal variation in soil contamination. In addition to the soil samples, bottom ash or slag sampleswere also obtained from the power plant
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