CONTENT OF PHOSPHATES IN DRINKING WATER OF DECENTRALIZED WATER SUPPLY (FOR THE EXAMPLE OF NORTH BUKOVYNА)
Journal Title: Naukovyi visnyk Chernivetskoho universytetu. Biolohiia (Biolohichni systemy) - Year 2017, Vol 9, Issue 1
Abstract
A comparative analysis of phosphates content in drinking water of decentralized water supply was carried out in the context of various catchment basins of the main rivers of Northern Bukovyna by the period of 2013-2014. The research was conducted in summer. Water sampling was carried out in accordance with GOST R 51593-2000 on the determination day or it was preserved. The content of phosphates was determined according to the generally accepted methodology. The principle of the method is based on the reaction of phosphorus with (NH4)6Mo7O24×4H2O in the presence of SnCl2×2H2O with the formation of a compound colored in blue. The intensity of its color was determined using photocolorimeter KFK-3. As result of the research, it is found that the level of PO43- in the well water of the Chernivtsi Region is not stable, and there were observed some changes towards the decrease in 2014 compared with 2013. Thus, the level of PO43- in 2013 was fluctuated within the range of 2.17-5.11 mg/dm3, and the level of PO43- in 2014 was fluctuated within the range of 0.42-0.80 mg/dm3. The following rankings were built in descending order on the basis of a comparative analysis of the averaged content of PO43- in the well water of the various catchment basins of the main rivers in the Chernivtsi Region: for 2013 – Prut > Dniester > Siret; for 2014 – Dniester > Prut > Siret. Accordingly, the lowest level of phosphates was recorded in drinking water of wells located on the catchment area of the Siret River basin. Significant differences were observed (by using the Mann-Whitney U-test) in 2014 between the phosphate content in the wells located on the territory of the Dniester River basin, in comparison with the similar indicators of the Siret River basin. At the same time, the level of PO43- was higher by 33% in the first case. It was established that the level of PO43- forms a joint association with indicators: Phosphorus content in soil, agrochemical and agroecological bonitets indexes, the area of agricultural land designated for crop (both in 2013 and in 2014). At the same time, the first three parameters were revealed a stronger interaction than with the latter indicator. The obtained results testify about the synergism of their dispersion. In addition, in 2014 the index of phosphate content was almost coincided with the agroecological bonitet index.
Authors and Affiliations
О. М. ЛАКУСТА, С. С. КОСТИШИН
Keywords
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