1) How to convert concentration of Uranium (ug/L) to activity of uranium (mBq/L or Bq/L)
2) Similarly, how to calculate uptake Daily radon intake via ingestion of water.
You can find an answer in any textbook. It is simply necessary to multiply the decay constant by the Avogadro's number and to divide the result by the atomic mass to get the activity in Bq per gram of substance. In the case of U-238 you obtain 1.24E+04 Bq/g. The final step is to multiply this value by grams of U-238 per unit of volume (of water) to obtain Bq of U-238 per unit volume. For Rn-222 the conversion factor is 5.69E+15 (approximately).
The daily uptake can be (technically) calculated by multiplying the concentration in water time the liters of water ingested per day.
I hope this is OK.
Yours
Sorry, I forgot to specify that the decaty constant should be in 1/sec.
Yours
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