نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه محیط زیست، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ایران
2 مرکز تحقیقات پسماند و پساب، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Wetlands, as one of the most important natural habitats in the world, play an important role in supplying fresh water and maintaining biological balance. The aim of this study was evaluating the spatial distribution of heavy metal concentrations of lead, zinc and cadmium in the sediments of Astara's Steel wetland. Data were obtained through sediment sampling with Van Veen grab sampler and analyzed through laboratory and statistical analysis. Sampling was done in autumn and winter of 2019-2020 monthly and randomly from wetland sediments in 4 stations in north, south, east and west of Steel Wetland. The results showed that the concentration of heavy metals in the sediments of the northern and western parts, especially the northwestern part of the wetland is higher than the southern and eastern parts. Experimental data indicated that the metals zinc, cadmium and lead with concentrations of 1.2, 1.2 and 0.99 ppm, respectively, had the highest concentration in the western station and the lowest concentration (zero ppm) at the Southern Station. The results of statistical analysis showed that the difference between the concentrations of heavy metals lead, cadmium and zinc in wetland sediments at different stations was significant (p<0.05). Pearson correlation method was used to investigate the correlation between heavy metals in the wetland. The results showed that the correlation between cadmium and zinc concentrations was not significant (p>0.01). Also, the correlation between lead and zinc concentrations was not significant (p>0.01). The correlation between cadmium and lead concentrations was significant (p<0.01).