Fig 2 - uploaded by Nazim Nikiforov
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The water vending machine purification process. Legend: 1 -5-µg polypropylene sediment filtration cartridge; 2 -granular activated carbon cartridge; 3 -1-µg polypropylene sediment filtration cartridge; 4 -reverse osmosis membrane stage; 5 -granular activated carbon cartridge; 6 -calcite-mineralization cartridge; 7 -ultraviolet lamp; 8 -ozonation.
Contexts in source publication
Context 1
... nm (UV 260 ). The last stage of the vending machine purification is ozonation. It is performed via 10 seconds of O 3 exposure with a dosage of 0.5 mg/L. It should be noted that the ozone treatment is performed on an empty vessel which is then filled with water. The scheme of vending machine and its purification process are presented in Fig. 1 and Fig. ...
Context 2
... removal potential of the water vending machine to the studied parameters in the high and low water seasons is shown in Fig. 2. The decrease in chloroform concentrations during the high water season was 15.6 µg/L (around 2.2 times, or by 54.3%), while it was 9.1 µg/L (around 3.1 times, or by 67.4%) during the low water season. Statistically significant differences were found in chloroform concentrations between the classically purified and the advanced ...
Citations
There are no studies investigating the association of chlorinated drinking water with the risk of cardiovascular diseases (CVDs) among young and middle-aged adults. This study was aimed to assess the associations between trihalomethanes (THMs) in drinking water and the risk of CVDs in in the target group in Petropavlovsk, Kazakhstan. 448 dwellers of Petropavlovsk were asked about their demographic, socioeconomic, lifestyle, behavioural characteristics, and drinking water preferences. THMs exposure was assessed to each participant based on their residence address. We used multivariable logistic regression analysis to assess the risk of CVDs in young and middle-aged adults. The results showed that the risk of hypertension in the adjusted logistic regression model was increased by 68% and a 2.7-fold in the second and third THM tertiles, respectively. Participants in the second and third THM exposure tertiles had a 2.3-fold and a 4.8-fold increase in the risk of arrhythmia.
