Determination of 226Ra, 232Th, 40K, 235U and 238U activity concentration and public dose assessment in soil samples from bauxite core deposits in Western Cameroon

Mekongtso Nguelem, Eric Jilbert; Moyo Ndontchueng, Maurice; Motapon, Ousmanou

doi:10.1186/s40064-016-2895-9

SpringerPlus

Table 1 Activity concentration of ⁴⁰K, ²²⁶Ra, ²³²Th, ²³⁵U and ²³⁸U measured in soil samples together with radiological health

From: Determination of ²²⁶Ra, ²³²Th, ⁴⁰K, ²³⁵U and ²³⁸U activity concentration and public dose assessment in soil samples from bauxite core deposits in Western Cameroon

Sample code	Activity concentration (Bq kg⁻¹)					Radiological health parameters
Sample code	⁴⁰K	²²⁶Ra	²³²Th	²³⁵U	²³⁸U	Ra_eq (Bq kg⁻¹)	AD (nGy h⁻¹)	OAED (mSv year⁻¹)	IAED (mSv year⁻¹)	H_ex
SO1	1269 ± 127	86 ± 4	95 ± 4	4 ± 2	94 ± 33	320.9	150.7	0.18	0.74	0.87
SO2	998 ± 29	94 ± 2	130 ± 3	6 ± 1	122 ± 24	357.8	164.0	0.20	0.80	0.97
SO3	1004 ± 41	88 ± 4	88 ± 2	4 ± 1	85 ± 30	292.7	136.4	0.17	0.67	0.79
SO4	1200 ± 98	119 ± 5	1664 ± 7	5 ± 1	115 ± 28	450.1	205.9	0.25	1.01	1.22
SO5	135 ± 2	154 ± 2	144 ± 4	7 ± 0	150 ± 9	371.1	164.1	0.20	0.80	1.00
SO6	240 ± 4	97 ± 4	78 ± 6	6 ± 1	122 ± 24	228.5	102.6	0.13	0.50	0.62
SO7	615 ± 83	116 ± 4	59 ± 6	5 ± 0	98 ± 7	247.6	114.9	0.14	0.56	0.67
SO8	316 ± 12	62 ± 2	117 ± 2	3 ± 1	70 ± 20	253.9	112.6	0.14	0.55	0.69
SO9	652 ± 25	199 ± 14	181 ± 7	ND	ND	508.6	228.7	0.28	1.12	1.37
SO10	609 ± 22	175 ± 12	217 ± 4	ND	160 ± 20	533.9	238.1	0.29	1.17	1.44
SO11	868 ± 45	118 ± 3	231 ± 5	ND	98 ± 30	515.4	230.3	0.28	1.13	1.39
SO12	799 ± 41	288 ± 21	256 ± 10	ND	215 ± 40	715.9	321.2	0.39	1.58	1.93
SO13	831 ± 39	106 ± 5	192 ± 5	ND	102 ± 25	445.4	199.9	0.25	0.98	1.20
SO14	678 ± 21	172 ± 8	200 ± 9	ND	163 ± 17	510. 5	228.7	0.28	1.12	1.38
SO15	800 ± 41	108 ± 5	206 ± 9	ND	97 ± 29	464.7	207.9	0.25	1.02	1.25
SO16	549 ± 29	118 ± 5	272 ± 11	5 ± 0	117 ± 9	549.3	241.7	0.30	1.19	1.48
SO17	499 ± 20	210 ± 9	236 ± 4	9 ± 1	194 ± 30	585.7	260.3	0.32	1.28	1.58
SO18	500 ± 30	113 ± 5	251 ± 5	6 ± 0	133 ± 9	510.3	224.6	0.28	1.10	1.38
SO19	965 ± 57	127 ± 3	271 ± 11	6 ± 4	137 ± 83	589.2	262.8	0.32	1.29	1.59
SO20	898 ± 50	92 ± 4	176 ± 7	ND	ND	412.6	186.2	0.23	0.91	1.11
SO21	910 ± 52	153 ± 7	213 ± 8	ND	ND	527.8	237.4	0.29	1.16	1.43
SO22	698 ± 49	107 ± 4	174 ± 4	ND	ND	410.7	184.2	0.23	0.90	1.11
SO23	809 ± 40	270 ± 20	213 ± 8	ND	ND	637.1	287.2	0.35	1.41	1.72
SO24	728 ± 39	150 ± 12	87 ± 2	ND	143 ± 21	330.5	152.2	0.19	0.75	0.89
SO25	868 ± 49	53 ± 2	59 ± 2	ND	49 ± 8	203.7	96.1	0.12	0.47	0.55
Min	136	53	58.8	ND	ND	203.7	96.1	0.12	0.47	0.55
Max	1269	288	272	9	215	715.9	321.2	0.39	1.58	1.93
SD	272	58	67	3	62	135.6	59.4	0.07	0.29	0.37
Arth.Mean	671	124.9	157	6	99	416.9	188.2	0.23	0.92	1.13
World.Mean						370	60	0.07	0.46

ND not detected

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