Iron and Manganese Content in Water of Non-Centralised Water Supply Facilities of the Tyumen Urban Agglomeration

Abstract

The purpose is to compare the iron (Fe) and manganese (Mn) content in the water of non-centralised water supply systems in the Tyumen urban agglomeration and other regions of the Russian Federation. Materials and methods. The methodology included the analysis of the chemical composition (Fe, Mn concentration), pH, hardness and permanganate index of 55 water samples (Tyumen urban agglomeration) and a comparison with published data on the water composition of other regions of the Russian Federation. Results and discussion. Water used for domestic and drinking water supply in the Tyumen urban agglomeration is found to have a pH varying from 5 to 8; the content of organic matter (permanganate index, PI) in all considered objects is within the norm (PI<5 mg/l). The average water hardness does not exceed the permissible values (6 ppm); the calculated Ca2+ ‒ Mg2+ contents are 75 and 45 mg-eq/l, respectively. Average iron concentrations in water of the Tyumen urban agglomeration are 1.9 MPC, manganese – 1.2 MPC. Conclusions. It is shown that the content of Fe and Mn in the Tyumen agglomeration is lower than in regions with a high level of anthropogenic pollution, but higher than the MPC and the content of these elements in regions where such an anomaly does not occur.