Determination of Heavy Metals Calcium (ca), Chlorine (cl) Ions as Salt of the Water by Graphite Furnace Atomic Absorption Spectrometry in the Tajan Water Way River, Iran

Purpose: Increasing salt of water is a world-wide problem, heavy metals belonging to the most important matrials. The progress of industries has led to increased emission of pollutants and salt of water into ecosystems. Tajan is one of navigable river in the Northh of Iran. Along the Tajan agricultural industries units such as piping, steel, paint making, paper mill, fish cultivation, abbottiors, electroplating industries drain their waste water into the river. In this study, the concentrations of Calcium(CA), Chlorine(CL) ions as salt of the water in the Tajan river have been determined Methods: Samples were collected from 5 stations along the river, in autumn and winter 2004. Heavy metal concentrations were measured by graphite furnace atomic absorption spectrometry. Results: The minimal and maximal concentrations of these metals in autumn were 58.3–75.4, 44.3–209ppm, for Ca, Cl respectively. The minimal and maximal concentrations of these metals in winter were 58.1–73.9, 55.6–117.25 ppm for Ca, Cl respectively. Conclusion: The results show that the salt of the water has increased along the river, down to the estuary at the Caspean Sea.