| خلاصه مقاله | Background and Aim: In most rural and urban communities, groundwater is the main source of drinking water. Climate change in a region, such as changes in lake water elevation or so-called lake drying, can have significant effects on the quantity and quality of the lake margin groundwater resources. The purpose of this study was to investigate the amounts of heavy metals in the drinking water east of Lake Uremia and its compliance with national standards. Describing the current status as a tool for managers to make decisions in their respective organizations is obviously a great help.
Methods: In this descriptive cross-sectional study, sampling was performed from 30 sources of drinking water (0-10, 10-20 and 20-30 km east of the lake) in spring 2019 and analysis of 13 heavy metal concentration parameters. The ICP-MAC method was tested in accordance with the standard method book. The research data were compared with national and international criteria. Then, the Dispersion map of heavy metal concentration distribution in drinking water resources was prepared using GIS and the data were analyzed by statistical test.
Results: Quantity of heavy metals parameters of Cu, Zn, Hg, Ni, Se, Al, Fe, Pb, Cu, Zn, Mn, Co, Zn, water samples taken from drinking water sources of East Lake Uremia villages by world and Iranian standards were compared that all parameters were in good condition compared to the mentioned standards. Based on the relationship between the concentration of cobalt, aluminum and iron in the eastern water sources of Lake Uremia with increasing distance from the lake shows a decreasing trend and with increasing the depth of the well in, the parameter of cobalt, arsenic, aluminum, lead, selenium, iron and copper trend was tangible increasing. The relationship between the concentration of arsenic, nickel, selenium, chromium and zinc in the water resources east of Lake Uremia shows an increasing trend with increasing distance from the lake, and with increasing depth of well, arsenic and nickel parameters show a decreasing trend.
Conclusion: Characteristics of Hydro chemicals of drinking water samples of residential areas east of Salt Lake of Uremia show that changes in concentration of chemical parameters in the water resources of Shabestar, Bonab, and Malkan the cities studied, in some parameters, have a noticeable increasing trend. It is recommended to re-evaluate the drinking water standards that meet the higher standards and determine its causes and factors to the contribution of different sources in changing the water quality of the area. |