ASSESSMENT OF RADON(222Rn) AND RADIUM(226Ra) CONCENTRATIONS IN WATER IN ME LINH DISTRICT, HANOI CITY
Radon (222Rn) and radium (226Ra) are natural sources of radiation that greatly affect human health. In this work, we investigated the concentration of radioactive gas radon and radium in domestic water, including: 20 samples of clean water provided by the water plant, 30 samples of pre-treated well water and 30 samples of well water from households in households in Me Linh district, Hanoi city. The concentration of radon and radium gas was determined using a specialized measuring device RAD-7. The results showed that radon and radium concentrations varied depending on the water source surveyed. In the clean water provided by the water plant, the radon concentration has a value of 0.05¸1.08 Bq/l, with an average of 0.39 Bq/l; Pre-treated well water has a value of 0.09¸4.67 Bq/l, an average of 2.25 Bq/l and well water has a value of 1.72¸8.93 Bq/l, an average of 3.45 Bq/l, these values are all within the allowable limit of the United States Environmental Protection Agency (US EPA) of 11.1 Bq/l. The radium concentration in clean water is 0.061¸0.173 Bq/l, average 0.097 Bq/l; Pre-treated well water 0.081¸0.238 Bq/l, average 0.128 Bq/l and borehole water value 0.091¸0.665 Bq/l, average 0.182 Bq/l, there are 17 well water samples and 12 The treated well water sample has a radium (226Ra) concentration that exceeds the allowable limit of the United States Environmental Protection Agency (US EPA) of 0.185 Bq/l .
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