Project participant list: Casa Sandisiwe (Republic of South Africa, - - PowerPoint PPT Presentation

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Dec 04, 2023 17 likes •270 views

Project participant list: Casa Sandisiwe (Republic of South Africa, University of Fort Hare) Khryshchanovich Andrey (Belarus, Minsk, Belarussian State University) Fedirko Julia (Belarus, Minsk, Belarussian State University) Babitski Maxim (Belarus,

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Project participant list: Casa Sandisiwe (Republic of South Africa, University of Fort Hare) Khryshchanovich Andrey (Belarus, Minsk, Belarussian State University) Fedirko Julia (Belarus, Minsk, Belarussian State University) Babitski Maxim (Belarus, Minsk, Belarussian State University) Project supervisor: Gustova Marina (JINR, Center of Applied Physics FLNR)

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Calibration curve construction for X-Ray fluorescence analysis.

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Determination of element distribution in mushrooms by X-Ray fluorescence analysis and radioactive nuclide the 137Cs using γ-spectrometry

f natural radioactivity.

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Results comparison of samples from Russia and Belarus.

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Figure 1. Mushrooms Figure 2. Soil

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XRF can be used for determination of a wide range of elements, from potassium (19) to uranium (92). Detection limits for the different elements are between 1 and 5 mg/g depending on the matrix and Z of the element

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Figure 3. Multielemental analysis of samples carried out on a setting for X-ray fluorescent analysis of FLNR, JINR

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Figure 4. Standard ring-shaped radioisotope sources 109Cd (E = 22,16 keV, T1/2 = 453 days) Figure 5. Si(Li) detector (area 30 mm2 surface, 3 mm thickness, Be window thickness 25 um, energy resolution (FWHM) – 145 eV at 5.9 keV energy). Figure 6. A pulse-height analyser Figure 7. Spectrum

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Figure 8. Spectrum obtained

137Cs

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Concentration of elements, ppm K Ca Cr Mn Fe Cu Zn Rb Ti Zr Sr Armillaria

77000 ± 3000 3008 ± 522 ≤ 10 60 ± 20 430 ± 50 6,3 ± 0,4 110 ± 20 130 ± 10 380 ± 108 ≤ 2 6 ± 2

Chanterelle

86000 ± 3000 ≤ 277 ≤ 10 ≤ 80 490 ± 40 5,3 ± 0,3 110 ± 10 310 ± 30 ≤ 100 ≤ 2 ≤ 2

Soil (chanterelle)

12000 ± 3000 ≤ 522 ≤ 10 260 ± 80 3800 ± 200 69 ± 6 60 ± 20 64 ± 6 2500 ± 500 79 ± 7 80 ± 4

Russule

52000 ± 3000 3000 ± 522 16 ± 7 ≤ 105 270 ± 50 6,2 ± 0,4 160 ± 20 150 ± 10 315 ± 97 ≤ 2 8 ± 1

Slippery Jack Caps

46000 ± 3000 3010 ± 522 22 ± 10 ≤ 105 300 ± 50 5,9 ± 0,4 160 ± 20 250 ± 20 ≤ 100 ≤ 2 ≤ 2

Stipes

45000 ± 3000 536 ± 204 ≤ 10 ≤ 80 420 ± 40 6,4 ± 0,4 90 ± 10 160 ± 10 ≤ 100 ≤ 2 ≤ 2

Film

48000 ± 3000 733 ± 197 ≤ 10 ≤ 80 780 ± 50 6,2 ± 0,4 110 ± 10 210 ± 20 ≤ 100 10 ± 1 13 ± 2

Top layer of soil

7602 ±1666 26000 ± 522 ≤ 10 550 ± 90 11600 ± 300 61 ± 5 110 ± 20 69 ± 6 2300 ± 500 202 ± 9 100 ± 4

Low layer of soil

19000 ± 3000 22000 ± 522 ≤ 10 600 ± 100 14000 ± 200 69 ± 6 100 ± 20 82 ± 7 3900 ± 600 240 ± 7 130 ± 5

Maximum permissible concentration for plants

3000 3000 0,2 750 50 10 10 100 1000 − 300

Table 1. The results of XRF analysis of mushroom samples and soil (russian)

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Concentration of elements, ppm K Ca Cr Mn Fe Cu Zn Rb Ti Zr Sr Slippery Jack Mushroom

122720 ± 3000 24540 ± 750 2340 ± 150 ≤ 80 4435 ± 350 ≤ 1 898 ± 40 989 ± 40 6400 ± 785 18 ± 2 21 ± 2

Top layer of soil

17000 ± 3000 7000 ± 950 ≤ 10 ≤ 80 6200 ± 100 41 ± 2 90 ± 10 72 ± 5 4100 ± 300 258 ± 5 84 ± 3

Low layer of soil

9000 ± 2000 7000 ± 1100 ≤ 10 400 ± 80 3600 ± 100 12 ± 1 70 ± 20 46 ± 4 2200 ± 200 188 ± 4 45 ± 3

Russule Mushroom

118616 ± 3000 18517 ± 522 3293 ± 110 ≤ 100 3600 ± 120 ≤ 1 1525 ± 85 281 ± 20 ≤ 100 21 ± 2 26 ± 3

Top layer of soil

12000 ± 600 8000 ± 400 ≤ 10 800 ± 40 9000 ± 200 9 ± 1 100 ± 20 65 ± 5 2300 ± 115 281 ± 5 82 ± 4

Low layer of soil

15000 ± 3000 9000 ± 450 ≤ 10 900 ± 100 5600 ± 100 10 ± 1 100 ± 20 58 ± 5 4600 ± 300 330 ± 6 56 ± 3

Maximum permissible concentration for plants

3000 3000 0,2 750 50 10 10 100 1000 − 300

Table 1. The results of XRF analysis of mushroom samples and soil (byelorussian)

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Concentration of elements, ppm K Ca Cr Mn Fe Cu Zn Rb Ti Zr Sr

Bolete

Caps

105565 ± 3000 9835 ± 1500 4350 ± 700 ≤ 80 3857 ± 40 ≤ 1 1278 ± 100 677 ± 30 ≤ 100 ≤ 2 23 ± 2

Stipes

73693 ± 3000 16774 ± 1500 3160 ± 200 ≤ 80 3540 ± 200 ≤ 1 619 ± 35 436 ± 20 6820 ± 1000 ≤ 2 ≤ 2

Birch Bolett

Caps

123452 ± 3000 17534 ± 1500 2724 ± 300 1349 ± 80 2983 ± 250 ≤ 1 1295 ± 100 453 ± 20 4983 ± 210 ≤ 2 24 ± 2

Stipes

59864 ± 3000 17853 ± 1500 3588 ± 300 ≤ 80 2964 ± 300 10 ± 1 651 ± 50 250 ± 15 6748 ± 300 ≤ 2 36 ± 3

Maximum permissible concentration for plants

3000 3000 0,2 750 50 10 10 100 1000 − 300

Table 1. The results of XRF analysis of mushroom samples (byelorussian)

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Radionuclide T1/2 , years Еγ, KeV Activity, Bq/kg

Armillaria Chanterelle Soil (chanterelle) Russule Slippery Jack

Slippery Jack

Caps Stipes Film Top layer of soil Low layer

f soil

137Cs

30,17 661 305,45 7,34 21,48 51,65 106,25 122,80 48,70 147,26 7,97 7,85 Maximum permissible concentration 500

Table 2. Results of natural and artificial radioactivity (russian samples)

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100 200 300 400 Armillaria Chanterelle Russule Slippery Jack 305,45 7,34 51,65 106,25

Activity

Activity, Bq/ kg

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50 100 150 Caps Stipes Film 122,8 48,7 147,26 Activity, Bq/ kg

Distribution of activity

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Radionuclide T1/2 , years Еγ, KeV Activity, Bq/kg

Russule Slippery Jack

Bolete

Birch Bolett

Mushroom Soil Mushroom Soil

137Cs

30,17 661 63,41 30,02 1930,04 88,29 878,05 164,95 Maximum permissible concentration 500

Table 2. Results of natural and artificial radioactivity (byelorussian samples)

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500 1000 1500 2000 Russule Slippery Jack Bolete Birch Bolett 63,41 1930,04 878,05 164,95

Activity

Activity, Bq/ kg

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200 400 600 800 1000 1200 1400 1600 1800 2000 Russule Slippery Jack 51,65 106,25 63,41 1930,04

Activity

Russia Belarus

Results comparison of samples from Russia and Belarus

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Concentration of elements, ppm

K Ca Cr Mn Fe Cu Zn Rb Ti Zr Sr Caps

46000 ± 3000 ≤ 3010 22 ± 10 ≤ 105 300 ± 50 5,9 ± 0,4 160 ± 20 250 ± 20 ≤ 100 ≤ 2 ≤ 2

Caps (boiled)

15000 ± 2000 ≤ 2985 20 ±10 ≤ 97 294 ± 60 5,8 ± 0,4 157 ± 20 72 ± 6 ≤ 100 ≤ 2 ≤ 2

Stipes

45000 ± 3000 536 ± 204 ≤ 10 ≤ 100 420 ± 40 6,4 ± 0,4 90 ± 10 160 ± 10 ≤ 100 ≤ 2 ≤ 2

Stipes (boiled)

8000 ±1000 525 ± 204 ≤10 ≤ 100 405 ± 50 6,2 ± 0,5 88 ± 20 45 ± 4 ≤ 100 ≤ 2 ≤ 2

Maximum permissible concentration for plants

3000 3000 0,2 750 50 10 10 100 1000 − 300

Table 3. The results of XRF analysis of boiled mushrooms

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Radionuclide T1/2 , years Еγ, KeV Activity, Bq/kg Caps Caps (boiled) Stipes Stipes (boiled)

137Cs

30,17 661

122,80 45,24 48,70 14,53

20 40 60 80 100 120 140 Caps Stipes 45,24 14,53 122,8 48,7 Activity after boiling, Bq/ kg Activity, Bq/ kg

Table 4. Results of natural and artificial radioactivity

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K, Ca, Cr, Cu, Mn, Fe, Zn, Ti, Rb, Zr, Sr were determined in the samples.

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The contents of Cu, Mn, Ti, Zr, Sr in various species of mushrooms are in limits MPC, whereas in byelorussian samples Ti exceed maximum permissible concentration

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Byelorussian mushrooms contain K, Zn, Rb, as russian mashrums, and also Cr much more than soil.

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Mushrooms except chanterelle concentrate 137Cs in great amount.

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The concentration of 137Cs in byelorussian samples is much more than in russian samples.

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The contents of K, Rb and 137Cs has decreased significantly after the boiling.

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