Document Type : Research Paper
Authors
1
graduated student of Malayer University
2
Professor, Natural Engineering Department, Malayer University, Hamedan, Iran
3
Assistant Professor, Faculty of Natural Resources and Environmental Science, Malayer University, Malayer
4
Department of Solid State Physics, Faculty of Basic Sciences, Malayer, Hamadan, Iran
Abstract
Rivers are one of the most important water sources used in the drinking, agriculture and industry sectors,, the present study aims to evaluate the ecological effect of the presence of heavy metals (chromium, copper, nickel, zinc, iron and manganese) in the water of Gamasiab river using Heavy Metal Pollution Indexes, In this research, 90 water samples were collected from 15 stations in two seasons, spring and summer, from Gamasiab River. After transferring the samples to the laboratory, the samples were prepared using the ASTM method, and the concentration of heavy metals was measured with the ICP-OES inductively coupled plasma spectrometer. According to the concentration of heavy metals in water samples, the HPI index was calculated for both seasons and the results were analyzed. The numerical value of the HPI index in spring and summer was -2.46 and -3.34, respectively, which indicates that the water of Gamasiab river is not polluted. The investigation of the MI index to evaluate the quality of water for drinking showed that in spring and summer, the water of the Gamasiab River is in the potable category. The value of MI index was reported as 0.075 in spring and 0.01 in summer. According to the HEI index, the water of Gamasiab river in the spring and summer season was placed in the category of low pollution with numerical values of 75 and 12.35, respectively. According to the results of the analysis of three indicators, it can be said with certainty that the degree of contamination of Gamasiab river water with heavy metals is low and does not threaten the ecological problems of the region, but considering the ecological importance of Gamasiab river and its higher The concentration of heavy metals in the spring season and the summer season,
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