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 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.
Prior to analysis, the soil samples were cleaned and dried and
weighed subsequent to the removal of stone, organic matter and
other non-soil material. The soil samples were then oven dried at
1001C and homogenized by manual crushing. A measured aliquot
of each sample was sealed in 500 ml Marinelli beakers. The ash
samples, being already in homogenized form, were directly packed
into the Marinelli beaker, the net mass being recorded. The masses
analyzed varied from 352 to 585 g in the case of soils and from 352
to 388 g for ash/slag. To allow secular equilibrium to be established
between
226
Ra,
228
Ra and their progenies, all of the samples were
measured approximately three weeks after being sealed in Marinelli beakers (Amin and Bradley, 2001)
The 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 a period 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.Prior to analysis, the soil samples were cleaned and dried andweighed subsequent to the removal of stone, organic matter andother non-soil material. The soil samples were then oven dried at1001C and homogenized by manual crushing. A measured aliquotof each sample was sealed in 500 ml Marinelli beakers. The ashsamples, being already in homogenized form, were directly packedinto the Marinelli beaker, the net mass being recorded. The massesวิเคราะห์ จาก 352 การ g 585 ในกรณีของดินเนื้อปูน และ 352 ที่แตกต่างกันการ g 388 สำหรับ เถ้า/slag ให้สมดุลทางโลกเพื่อสร้างระหว่าง226ปาน228Ra และ progenies ของพวกเขา ตัวอย่างทั้งหมดได้วัดได้ประมาณ 3 สัปดาห์หลังจากการปิดผนึกใน beakers Marinelli (เสื้อผ้าของและ Bradley, 2001)
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