Comparison of potentiality of heavy metals accumulation in the plants surrounding steel industries in the Mahshahr-Bandar Imam road, Ahvaz

Plants use of water، air and soil plays an important role in changing ecological conditions. Therefore، the plants could be used to purity ecosystems from various pollutions such as heavy metal. In this study، heavy metals concentration such as، Ni، Mn، Zn، Fe and Pb in the plants and soils surrounding steel production industries in east west of Ahwaz city in the Mahshahr-Bandar Imam road was investigated. The results indicated that average bioavailable metal concentration in soil samples changes as Fe> Mn> Zn> Ni> Pb (mg. kg-1). The maximum value of Fe was measured in the shoot of Taraxacum kotschyi (891 mg. kg-1 DW) as a herb and Conocarpus erectus (860. 63 mg. kg-1 DW) as a tree، Zn and Mn maximum was assayed in the shoot of T. kotschyi with 108. 63 and 93. 90 mg. kg-1 DW، respectively. Also، the maximum concentration of Ni was measured in tree type of Eucalyptus camaldulensis with 10. 86 mg. kg-1 DW value. The Pb concentration was not determinable in plant and soil samples. The results of bioconcentration factor and translocation factor indicated that these factors were higher than 1 in most of the cases. Based on the study، it seemed that mentioned metal concentration in plants was lower than defined as threshold in a hyperaccumulator plant. However، it could be assumed that selected plants would be able to accumulate metal in shoot.