Country

Study Site

Concentration Range

Average Concentration (Bq/m³)

Source

Burkina Faso

Institute of Science and Technology

6.143 Bq/m³ to 172.571 Bq/m³

52.46

This Study

Nigeria

Campus de Enugu, University of Nigeria

2.5 Bq/m³ to 21.3 Bq/m³

11.8

Okeji et al., 2013 [23]

Nigeria

Université de Ibadan

157 Bq/m³ to 495 Bq/m³

293.3

Obed et al., 2010 [24]

Nigeria

Université de Obafemi Awolowo

0 Bq/m³ to 196 Bq/m³

37

Afolabi et al., 2015 [25]

Türkiye

Adapazarı

45 Bq/m³ to 173 Bq/m³

76

Enis Kapdan and Nesrin Altınsoy, 2014 [26]