Potential health risk assessment due to the presence of toxic metals in drinking water from individual wells in the village of Dubravica in the Branicevo district

Abstract

In order to verify the content of macro- and microelements in drinking water in the village of Dubravica in the Branicevo district, which has no centralized water supply system, an analysis of the water sampled from two individual wells was conducted using the indirect method recommended by Rajkovic and associates. Tests on the RDA and AAS showed that: Al, Fe, Cr, Pb and U were in concentrations higher than the values allowed by Regulations on the hygienic quality of drinking water. To determine the risk of the presence of toxic metals in the elevated concentrations, the assessment of short-term and long-term potential carcinogenic risks was conducted. Based on the results obtained in the tested water samples, it is noticed that the value of the coefficient of risk (CR) was less than 1 for all potentially toxic metals that were determined in drinking water, which implies that there is no short-term carcinogenic potential risk to human health. Based on the results of the long-term potential risk for the occurrence and development of cancer, the risk of getting cancer of Cr was identified in the inhabitants of the village that used potable water of the first sample. In case of Pb, a risk of developing cancer, concerning the first sample of drinking water, may occur in 44 out of 1000 people and regarding the second sample, in 183 out of 1000 people. Based on the calculated estimates of the long-term health risk related to the presence of U in drinking water, it can be seen that there is a health risk related to the use of both water samples. On the basis of the calculated estimates of the long-term health risk related to the presence of uranium in drinking water, it can be noticed that the use of both water samples may lead to the potential risk of developing cancer: in 24.5 inhabitants regarding the first water sample and in 10.3 out of 1000 inhabitants in the case of the second water sample.

Da bi se proverio sadržaj makro- i mikroelemenata u vodi za piće u selu Dubravica u Braničevskom okrugu, koje nema centralizovan vodovodni sistem, izvršena je analiza voda koje su uzorkovane iz dva individualna bunara, indirektnom metodom preporučenom od strane Rajkovića i saradnika. Ispitivanja su pokazala da se: Al, Fe, Cr, Pb i U nalaze u koncentracijama višim od MDK vrednosti dozvoljene Pravilnikom o higijenskoj ispravnosti vode za piće. Da bi se utvrdila opasnost od prisustva toksičnih metala u povišenoj koncentraciji urađ ena je procena kratkoročnog i dugoročnog potencijalnog kancerogenog rizika. Na osnovu rezultata ispitivanja koji su dobijeni za ispitivane uzorke vode, ne postoji potencijalni kratkoročni kancerogeni rizik po zdravlje ljudi. Na osnovu rezultata dobijenih za dugoročni potencijalni rizik za pojavu i razvoj kancerogenih oboljenja, kod stanovnika sela koji koriste vodu za piće i uzorka izražen je rizik za nastajanje kancera od Cr. U slučaju Pb, rizik od pojave kancera u slučaju I uzorka vode za piće javlja se kod 44 od 1000 stanovnika, a u slučaju II uzorak kod 183 od 1000 stanovnika. Na osnovu izračunate procene dugoročnog zdravstvenog rizika od prisustva U u vodi za piće zapaža se da u slučaju konzumiranja oba uzorka vode postoji potencijalni rizik od nastajanje kancera: u slučaju I uzorka vode kod 24,5 stanovnika, a u slučaju II uzorka 10,3 stanovnika od 1000 stanovnika.