Trace element and radiological characterisation of ash and soil at a legacy site in the former Raša coal-mining area

1^st field campaign (May 2019)
Sample label	Sample type	Geographical coordinates
0	Soil	45° 7' 14.40"N	14° 7' 36.86" E
1		45° 7' 10.80"N	14° 7' 40.40" E
2		45° 7' 9.98"N	14° 7' 41.97" E
3		45° 7' 8.87" N	14° 7' 43.53" E
5		45° 7' 11.41" N	14° 7' 46.35" E
6		45° 7' 13.12" N	14° 7' 44.07" E
7		45° 7' 13.55" N	14° 7' 48.76" E
8		45° 7' 11.09" N	14° 7' 44.22" E
9		45° 7' 14.97" N	14° 7' 48.27" E
10		45° 7' 16.45" N	14° 7' 49.44" E
11		45° 7' 17.60" N	14° 7' 50.48" E
12	Ash	45° 7'10.88" N	14° 7'39.14" E
13		45° 7'10.88" N	14° 7'39.14" E
14		45° 7' 11.31" N	14° 7' 38.83" E
15		45° 7' 11.31" N	14° 7' 38.83" E

2^nd field campaign (July 2019)
Sample	Subsample	Sample type	Geographical coordinates
A1	A1	Ash	45° 7' 10.36" N	14° 7' 37.95" E
A2	A2a		45° 7' 10.55" N	14° 7' 37.80" E
A2	A2b		45° 7' 10.55" N	14° 7' 37.80" E
A3	A3a		45° 7' 10.85" N	14° 7' 37.78" E
	A3b
	A3c
B1	B1a		45° 7' 10.55" N	14° 7' 38.83" E
B1	B1b		45° 7' 10.55" N	14° 7' 38.83" E
B2	B2a		45° 7' 10.82" N	14° 7' 38.54" E
	B2b
	B2c
B3	B3a		45° 7' 11.00" N	14° 7' 38.33" E
B3	B3b		45° 7' 11.00" N	14° 7' 38.33" E
C1	C1		45° 7' 12.18" N	14° 7' 40.54" E
C2	C2		45° 7' 12.36"N	14° 7' 40.25" E
D1	D1		45° 7' 13.68" N	14° 7' 39.80" E
D2	D2		45° 7' 13.50" N	14° 7' 40.80" E

Standard IBA experimental chamber for PIXE and RBS measurements with marked positions of detectors, sample holder, suppression, Faraday cup, and incoming beam

Table 2

Comparison between measured and certified values for standard reference materials SRM 2710 and PTXRFIAEA08 Natural Soil*

Element	SRM 2710			Natural soil
Element	Mean±SD	Certified value ± error	Relative error (%)	Mean ± SD	Certified value ± error	Relative error (%)
Mg	0.8±0.2	0.853±0.04	-6.3	-	-	-
Al	6.5±0.2	6.44±0.08	1.1	17.99±0.06	15.2±0.4	18.4
Si	27.0±0.3	29.0±0.2	-6.8	17.68±0.06	18.7±0.4	-5.4
S	0.26±0.01	0.240±0.006	8.1	0.109±0.05	0.071±0.004	54.5
K	2.03±0.04	2.1±0.1	-3.7	0.023±0.003	0.034±0.002	-33.1
Ca	1.12±0.02	1.25±0.03	-10.3	-	-	-
Fe	3.28±0.03	3.4±0.1	-3.1	8.82±0.03	9.0±0.3	-2.2
Na	9000±400	11400±600	-21.3	-	-	-
P	1400±200	1060±150	30.7	-	-	-
Ti	2670±60	2830±100	-5.7	9200±100	9410±380	-1.9
V	90±20	76.6±2.3	21.5	280±50	270±19	4.7
Cr	80±30	39	98.0	30±20	31±3	6.7
Mn	9700±200	10100±400	-4.1	180±30	174±13	2.8
Ni	21±2	14.3±1	49.2	-	-	-
Cu	3150±40	2950±130	6.7	50±10	36±3.4	48.1
Zn	7100±100	6952±91	1.6	40±10	69±6	-34.2
Ga	-	-	-	50±20	33±3	45.9
As	400±100	626±38	-27.6	-	-	-
Se	-	-	-	60±40	2.3±0.3	2354.1
Br	250±50	15±2	1524.0	-	-	-
Sr	-	-	-	30±30	4.6±0.6	562.3
Zr	-	-	-	200±50	266±18	-23.8
Ba	540±70	707±51	-23.5	-	-	-
Hg	140±80	33±2	316.2	-	-	-
Pb	6800±200	5532±80	22.1	-	-	-

1 * Concentrations of major elements (Mg, Al, Si, K, Ca, Fe) and S are given in percentage, of minor and trace elements in mg/kg, and data accuracy as relative error in percentage

PIXE spectra of the soil sample taken with (a) SDD and (b) Si(Li) detector induced with 2 MeV protons

Table 3

Major and minor element concentrations (in %) in measured soil samples with limits of detection (LOD) for each element

Soil samples	Mg	Al	Si	S	K	Ca	Fe
1	1.5±0.1	2.3±0.2	2.2±0.1	3.6±0.2	0.015±0.09	29±3	1.58±0.02
2	1.25±0.01	7.91±0.03	22.82±0.07	0.180±0.005	1.45±0.01	7.21±0.03	4.22±0.04
3	1.29±0.004	9.22±0.03	26±1	0.09±0.01	1.5±0.1	1.11±0.03	4.92±0.06
5	1.13±0.01	8.85±0.03	27.90±0.09	0.09±0.004	1.43±0.01	0.984±0.009	4.73±0.08
6	0.82±0.01	6.3±0.02	19.32±0.03	2.94±0.01	0.763±0.008	6.94±0.02	3.44±0.02
7	1.03±0.03	5.3±0.1	16±1	0.06±0.01	1.25±0.03	19.4±0.04	2.574±0.08
8	1.03±0.01	8.34±0.04	28.4±0.1	0.293±0.006	1.43±0.01	1.31±0.01	4.33±0.07
9	1±0.01	7.88±0.03	30.5±0.1	0.227±0.006	1.34±0.01	1.26±0.01	4.1±0.08
10	0.98±0.01	8.76±0.03	31.11±0.08	0.156±0.006	1.34±0.01	0.862±0.09	4.43±0.09
11	0.89±0.01	8.24±0.04	26.9±0.01	0.176±0.006	1.29±0.01	1.19±0.01	3.95±0.07
12	1.25±0.02	1.17±0.01	1.16±0.01	8.26±0.04	--	26.2±0.1	0.93±0.01
LOD	0.01	0.007	0.006	0.007	0.005	0.01	0.002

1 LOD – limit of detection

Table 4

Minor and trace element concentrations (in mg/kg) in measured soil samples with limits of detection (LOD) for each element and comparison with trace element concentrations obtained with HR-ICP-MS in one sample taken close to location 1 reported by Petrović (48)

Soil samples	Na	P	Cl	Ti	V	Cr	Mn	Co	Ni
1	--	--	--	1180±70	200±10	160±40	200±100	--	20±10
2	1600±100	600±60	140±30	4170±70	150±20	450±40	1490±60	--	140±10
3	2300±100	760±60	120±10	5030±80	150±20	300±100	1700±100	--	159±6
5	2600±100	740±60	150±30	5390±70	140±20	350±30	2170±70	170± 30	144±9
6	2000±100	130±60	200±30	4510±70	210±20	320±40	1000±50	--	104±8
7	1230±40	400±100	160±60	2600±200	90±10	400±200	500±40	--	82±4
8	3300±100	1470±70	130±30	4850±70	200±20	380±30	1770±60	--	100±10
9	2400±100	890±70	230±30	4740±70	150±20	270±30	1340±60	--	126±8
10	4000±200	800±70	120±30	6070±80	140±20	570±40	1370±60	--	110±8
11	3800±200	1350±80	400±40	5810±80	120±20	380±30	2180±70	--	85±8
12	--	--	100±30	710±60	130±20	100±60	360±80	--	--
Petrović (48)	--	--	--	--	183	167	--	--	96.3
LOD	200	100	50	40	50	50	60	200	10

1 LOD – limit of detection

Table 5

Trace element concentrations (in mg/kg) in measured soil samples with limits of detection (LOD) for each element and comparison with trace element concentrations obtained with HR-ICP-MS in one sample taken close to location 1 reported by Petrović (48)

Soil Samples	Cu	Zn	As	Se	Br	Rb	Sr	Y	Pb
1	180±50	70±20	20±10	20±10	30±10	--	550±20	60±20	70±40
2	73±9	120±10	--	--	30±30	210±40	250±30	--	120±90
3	51±6	160±50	--	--	--	360±50	70±50	--	130±20
5	44±8	130±10	--	--	60±30	330±40	140±30	--	200±100
6	86±8	130±10	--	--	40±20	130±30	210±30	--	170±80
7	30±30	90±10	--	--	20±20	120±20	504±6	--	90±60
8	39±8	110±10	--	20±20	60±30	260±40	100±30	--	200±100
9	37±7	120±10	--	--	--	230±40	130±20	--	110±90
10	24±8	100±10	--	40±20	30±30	220±40	90±20	--	100±100
11	41±7	100±10	--	23±9	--	180±30	130±20	--	140±90
12	72±9	13±7	20±10	--	--	--	580±40	--	--
Petrović	37.8	120	14.8	21.8	--	--	128	--	48.2
LOD	10	20	20	30	40	50	30	20	90

1 LOD – limit of detection

Table 6

Measured elements in this study (mg/kg) compared to world soils and Croatian legislation

Element	This research (mg/kg)	Croatian legislation (51) (mg/kg)	World soils (52, 53) (mg/kg)	World soils (54) (mg/kg)	Topsoil Europe (54) (mg/kg)	Geochemical atlas (50) (mg/kg)
Al	11700–92200		80000			78500
As	20	30	5	6.83	11.6	18
Br	20*–60		10	10
Ca	8620–290000		14000			13300
Cl	100–400		300	300
Co	170*	60	10	11.3	10.4	18
Cr	100–570	120	80	59.5	94.8	121
Cu	24–180	120	25	38.9	17.3	35.5
Fe	9300–49200		35000			41800
K	150–10500		14000			12500
Mg	8900–15000		9000			6800
Mn	200–2180		530	488	524	1082
Na	1230–4000		10000			3400
Ni	20–159	75	20	29	37	74.6
P	130–1470		750			650
Pb	70*–200	150	17		32	48.7
Rb	120–360		65	68	87
S	600–82600		800
Se	20*–40		0.3	0.44
Si	22000–311100		280000
Sr	70–580		240		130	86
Ti	710–6070		4000	7038	6070	4300
V	90–200		90	129	68	148
Y	60		20	23	23	28
Zn	13*–160	200	70	267	68.1	108

1 * Levels below LOD. Values from the Geochemical Atlas of Croatia are given as medians for coastal Croatia

Table 7

Ranking of sampling locations by measured S and V levels (from highest to lowest)

Sampling location	S (%)	Sampling location	V (mg/kg)
12	8.26	6	210
1	3.6	1	200
6	2.94	8	200
8	0.293	2	150
9	0.227	3	150
2	0.18	9	150
11	0.176	5	140
10	0.156	10	140
3	0.09	12	130
5	0.09	11	120
7	0.06	7	90

1 Levels above the median are highlighted in boldface

Table 8

Pollution indices of selected elements in respect to reference values from Table 6 used in PI calculation*

Variables	Croatian ordinance (51)	World soils (52, 53)	World soils (54)	Topsoil Europe (54)	Geochemical atlas of Croatia (50)
As	0.67	4	2.93	1.72	1.11
Co	2.83	17	15.04	16.35	9.44
Cu	1.5	7.2	4.63	10.4	5.07
Cr	4.75	7.13	9.58	6.01	4.71
Fe		1.41			1.18
Mn		4.11	4.47	4.16	2.01
Ni	2.12	7.95	5.48	4.3	2.13
Pb	0.93	8.24		4.38	2.87
S		103.25
Se		133.33	90.91
Sr		2.42		4.46	6.74
V		2.22	1.55	2.94	1.35
Zn	0.8	2.29	0.6	2.35	1.48

1 * obtained by dividing the highest element level in the range with respective reference value

Table 9

Activity concentrations (Bq/kg) of natural radionuclides in soil and ash samples from Štrmac

	Sample code	Sample type	²³⁸U	²³²Th	²²⁶Ra	²¹⁰Pb	⁴⁰K
	Sample code	Sample type	Activity concentration ± relative uncertainty (Bq/kg)
1^st field campaign
	0	Soil	99±7	22±2	81±1	231±47	134±4
	2		58±6	44±2	44.1±0.9	52±47	433±10
	6		62±8	57±2	58.9±0.8	160±31	446±10
	7		50±4	20.8±0.9	23.2±0.6	171±33	354±9
	9		72±6	51±2	75±1	219±37	453±11
	11		138±9	67±3	81±1	238±37	464±12
	14	Ash	458±10	17±2	349±3	288±29	302.6±0.9
	15	Ash	372±9	16±2	314±3	240±46	319±1
2^nd field campaign
	A1	Ash	605±13	44±2	295±2	306±24	188±4
	A2a		567±10	34±2	440±2	318±20	183±6
	A2b		413±10	32±3	465±4	260±42	149±7
	A3a		440±15	42±3	551±3	341±31	173±7
	A3b		828±19	41±2	681±3	393±29	140±6
	A3c		401±12	29±2	376±2	303±24	162±7
	B1a		663±15	18±1	405±3	392±26	147±5
	B1b		306±8	16±1	341±2	227±27	147±6
	B2a		340±9	18±1	332±3	240±40	36±2
	B2b		308±8	13±1	316±2	168±31	137±8
	B2c		403±9	21±2	396±3	296±25	55±3
	B3a		304±7	7±1	326±2	230±37	141±6
	B3b		459±12	13±1	318±3	251±24	160±5
	C1		88±6	10±2	96±1	49±39	147±5
	C2		211±7	27±2	274±2	149±19	226±6
	D1		236±11	18±2	236±2	204±35	153±6
	D2		250±7	9±1	225±2	193±33	118±5

Table 10

Mean, minimum, and maximum activity concentrations (Bq/kg) of natural radionuclides in soil and ash samples from Štrmac

Sample type		²³⁸U	²³²Th	²²⁶_Ra	²¹⁰_Pb	⁴⁰K
Sample type		Activity concentration (Bq/kg)
Soil	Average±SD	80±33	44±19	61±23	179±70	381±127
	Min	50	21	23	52	134
	Max	138	67	81	239	464
Ash	Average±SD	403±174	22±12	355±125	255±84	162±67
	Min	88	7	96	49	36
	Max	828	44	681	393	319

Table 11

Mean radium equivalent indices (Ra_eq), absorbed dose rates (Ḋ), and annual effective doses (E) in soil and ash samples at the Štrmac legacy site calculated from activity concentrations of activity concentration of ²²⁶Ra, ²³²Th, and ⁴⁰K

Sample type	Ra_eq (Bq/kg)	Ḋ (nGy/h)	E (mSv/year)
Ash (n=19)	399 (122–751)	184 (57–346)	0.23 (0.07–0.42)
Soil (n=6)	153 (80–213)	71 (38–99)	0.09 (0.05–0.12)

1 Ranges are given in parentheses

References

Authors

Metrics

Articles in this issue

DOI: https://doi.org/10.2478/aiht-2024-75-3897 | Journal eISSN: 1848-6312 (formerly 0004-1254) | Journal ISSN: 0004-1254

Journal RSS Feed

Language: English, Croatian

Page range: 245 - 258

Submitted on: Sep 1, 2024

Accepted on: Nov 1, 2024

Published on: Dec 29, 2024

Published by: Institute for Medical Research and Occupational Health

In partnership with: Paradigm Publishing Services

Keywords:

ash,

hazardous trace elements,

NORM,

PIXE,

radionuclides,

soil

Related subjects:

Medicine,

Basic medical science,

Basic medical science, other

© 2024 Tomislav Bituh, Josip Peco, Iva Božičević Mihalić, Sabrina Gouasmia, Marija Grlić, Branko Petrinec, published by Institute for Medical Research and Occupational Health
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Volume 75 (2024): Issue 4 (December 2024)

Trace element and radiological characterisation of ash and soil at a legacy site in the former Raša coal-mining area

Figures & Tables

Figure 1

Table 1

Sample labels and geographical coordinates

Figure 2

Table 2

Comparison between measured and certified values for standard reference materials SRM 2710 and PTXRFIAEA08 Natural Soil*

Figure 3

Table 3

Major and minor element concentrations (in %) in measured soil samples with limits of detection (LOD) for each element

Table 4

Minor and trace element concentrations (in mg/kg) in measured soil samples with limits of detection (LOD) for each element and comparison with trace element concentrations obtained with HR-ICP-MS in one sample taken close to location 1 reported by Petrović (48)

Table 5

Trace element concentrations (in mg/kg) in measured soil samples with limits of detection (LOD) for each element and comparison with trace element concentrations obtained with HR-ICP-MS in one sample taken close to location 1 reported by Petrović (48)

Table 6

Measured elements in this study (mg/kg) compared to world soils and Croatian legislation

Table 7

Ranking of sampling locations by measured S and V levels (from highest to lowest)

Table 8

Pollution indices of selected elements in respect to reference values from Table 6 used in PI calculation*

Table 9

Activity concentrations (Bq/kg) of natural radionuclides in soil and ash samples from Štrmac

Table 10

Mean, minimum, and maximum activity concentrations (Bq/kg) of natural radionuclides in soil and ash samples from Štrmac

Table 11

Mean radium equivalent indices (Ra_eq), absorbed dose rates (Ḋ), and annual effective doses (E) in soil and ash samples at the Štrmac legacy site calculated from activity concentrations of activity concentration of ²²⁶Ra, ²³²Th, and ⁴⁰K

Paradigm

My account

Trace element and radiological characterisation of ash and soil at a legacy site in the former Raša coal-mining area

Figures & Tables

Figure 1

Table 1

Sample labels and geographical coordinates

Figure 2

Table 2

Comparison between measured and certified values for standard reference materials SRM 2710 and PTXRFIAEA08 Natural Soil*

Figure 3

Table 3

Major and minor element concentrations (in %) in measured soil samples with limits of detection (LOD) for each element

Table 4

Minor and trace element concentrations (in mg/kg) in measured soil samples with limits of detection (LOD) for each element and comparison with trace element concentrations obtained with HR-ICP-MS in one sample taken close to location 1 reported by Petrović (48)

Table 5

Trace element concentrations (in mg/kg) in measured soil samples with limits of detection (LOD) for each element and comparison with trace element concentrations obtained with HR-ICP-MS in one sample taken close to location 1 reported by Petrović (48)

Table 6

Measured elements in this study (mg/kg) compared to world soils and Croatian legislation

Table 7

Ranking of sampling locations by measured S and V levels (from highest to lowest)

Table 8

Pollution indices of selected elements in respect to reference values from Table 6 used in PI calculation*

Table 9

Activity concentrations (Bq/kg) of natural radionuclides in soil and ash samples from Štrmac

Table 10

Mean, minimum, and maximum activity concentrations (Bq/kg) of natural radionuclides in soil and ash samples from Štrmac

Table 11

Mean radium equivalent indices (Raeq), absorbed dose rates (Ḋ), and annual effective doses (E) in soil and ash samples at the Štrmac legacy site calculated from activity concentrations of activity concentration of 226Ra, 232Th, and 40K

Mean radium equivalent indices (Ra_eq), absorbed dose rates (Ḋ), and annual effective doses (E) in soil and ash samples at the Štrmac legacy site calculated from activity concentrations of activity concentration of ²²⁶Ra, ²³²Th, and ⁴⁰K