The Activity Concentrations and Radium Equivalent Activity in Soil Samples Collected from the Eastern Part of Basrah Governorate in Southern Iraq

Table 6

A comparison of the mass concentrations of ²³⁸U, ²³²Th, and ⁴⁰K in clay soil samples evaluated in the present study with other locations around the world.

Location	^238U (ppm)	^232Th (ppm)	^40K (%)	references
Present study (Abu Al Khasib)	2.4-5.6	3.6-7.5	0.1-2.0
Present study (Ad Dayr)	2.1-4.5	3.7-7.9	0.9-1.8
Cyprus	0.08-7.2	0.25-13.1	0.04-2.91	[16]
Italy	0.16-5.6	0.25-16.8	0.03-5.14	[17]
Bulgaria	0.64-15.2	1.73-39.5	0.05-3.75	[18]
Canada (Rock)	0.8-16.4	1.1-41.0	1.0-6.2	[19]
Jordan	1.76-8.32	5.18-25.4	0.45-1.96	[20]
USA	0.32-11.2	0.98-32.1	0.32-2.28	[18]
Egypt	0.48-9.6	0.49-23.7	0.09-2.12	[18]
Serbia and Montenegro	1.2-6.24	4.45-21.0	0.88-2.99	[21]
Albania	0.48-7.68	0.98-39.5	0.05-3.75	[18]
Australia	1.6-3.8	6-19	0.7-1.9	[22]
World Average	2.64	11.1	1.37	[21]