Investigation on concentration of elements in wetland sediments and aquatic plants

The major aim of the present study was to investigate elements (Fe, Ni, Pb, V, Zn) concentration in sediment and different tissues of Phragmities australis and Typha latifolia in Hor al-Azim Wetland southwest of Iran. Sampling of sediments and aquatic plants was carried out during spring and summer 2014. Results showed that the mean concentrations of chemical elements in Phragmities australis in root and stem-leaf were as follows: iron: 4448 mg/kg, nickel: 28 mg/kg, lead: 8 mg/kg, vanadium: 10 mg/kg and zinc: 15.5 mg/kg in root and Iron: 645 mg/kg, nickel: 15 mg/kg, lead: 4 mg/kg, vanadium: 4 mg/kg and zinc 16 mg/kg respectively. Also, the mean concentrations of iron, nickel, lead, vanadium and zinc in roots of Typha latifolia were 8696 mg/kg, 34 mg/kg, 5 mg/kg, 19 mg/kg and 27 mg/kg respectively. The mean concentrations of iron, nickel, vanadium, lead and zinc in stem-leaves of Typha latifolia were as follows: 321 mg/kg, 3 mg/kg, 7 mg/kg, 2 mg/kg and 14 mg/kg respectively. The mean concentrations of iron, nickel, vanadium, lead and zinc were as: 40991 mg/kg, 65 mg/kg, 60 mg/kg, 31 mg/kg and 60 mg/kg respectively in surface sediment of the study area. Concentration pattern of the elements in sediment were as: Fe> Ni> Zn> V> Pb. The highest concentration of the elements in the plant was seen in the roots. Also, Typha latifolia can uptake more concentration of elements than Phragmities australis. Based on the enrichment factor, nickel in summer had the highest enrichment factor values among the elements studied and it has a moderate enrichment.

Keywords:

Elements , Enrichment factor , Hor al-Azim Wetland , Phragmities australis , Typha latifolia