نوع مقاله : مقاله پژوهشی
گروه محیط زیست، دانشگاه آزاد اسلامی، واحد دماوند، دماوند ، ایران.
عنوان مقاله [English]
This study was conducted to evaluate the physico-chemical parameters and heavy metals (Lead and Cadmium) levels in the water of the Damavand River. Samples were collected from 10 stations over a three month summer period in 2015. parameters were measured according to the standard methods for the examination of water and wastewater and the institute of standards & industrial research of Iran guidelines. Temperature, pH and turbidity were measured in situ. There were no significant differences between temperature, pH, turbidity, electrical conductivity, BOD, calcium, magnesium, sulphate, nitrate and phosphate in the stations at 95% confidence level. Significantly (P<0.05) highest level of COD was for station 10 (24.47±7.45 mg/lit) and the lowest one was in station 4 (8.34±5.56 mg/lit). Significantly lowest levels of lead and cadmium were obtained at station 1. There were no significant variations (P>0.05) between lead levels in the stations 8, 9 and 10 and also between cadmium concentrations in the stations 8 and 10; these stations had the highest levels of the heavy metals. result was due to effluents from industrial units in the downstream of the river. were significant differences between temperature, pH, BOD, calcium, magnesium, sulphate and phosphate in the months at 95% confidence level