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A comparison of our study with other studies of black sand beaches22.
| Country | Area | Area Characteristics | Absorbed dose rate in air (nGy.h−1) |
|---|---|---|---|
| Brazil | Guarapari | Monazite sands; coastal areas | 90–170 (streets) 90–90000 (beaches) 110–1 300 |
| China | Yangjiang Quangdong | Monazite particles | 370 average |
| India | Kerala Ganges Delta | Monazite sands, | 200–4000 1800 average 260–440 |
| Egypt | Nile Delta | Monazite sands | 20–400 |
| Present study | North of Nile Delta | Monazite sands | 55.51–345.95 186 average |
