Phytoremediation potential of native plants grown in the vicinity of Ahangaran lead–zinc mine (Hamedan, Iran)

Abstract

This study aims to assess the extent of metal accumulation by plants found in a mining area in Hamedan Province in the central west part of Iran. It also investigates to find suitable plants for phytoextraction and phytostabilization as two phytoremediation strategies. Plants with a high bioconcentration factor (BCF) and low translocation factor (TF) have the potential for phytostabilization while plants with both BCFs and TFs greater than one have the potential to be used for phytoextraction. In this study, shoots and roots of the 12 plant species and the associated soil samples were collected. The collected samples were then analyzed by measurement of total concentrations of trace elements (Pb, Zn, Mn and Fe) using atomic absorption spectrophotometer. Simultaneously, BCF and TF parameters were calculated for each element. Results showed that although samples suitable for phytoextraction of Pb, Zn, Mn and Fe and phytostabilization of Fe were not detected, Scrophularia scoparia was the most suitable for phytostabilization of Pb, Centaurea virgata, Echinophora platyloba and Scariola orientalis had the potential for phytostabilization of Zn and Centaurea virgata and Cirsium congestum were the most efficient in phytostabilization of Mn. Present study showed that native plant species growing on contaminated sites may have the potential for phytoremediation.

In vitro multiplication of Dianthus carthusianorum calamine ecotype with the aim to revegetate and stabilize polluted wastes

“…Thus, enormous efforts should be undertaken to overcome the limited possibilities of plant introduction and survival on degraded areas. Novel sustainable strategy of waste stabilization and reclamation bases on different metallophytes occurring on post-industrial terrains abandoned for many years (Nouri et al 2011;Muszyńska et al 2015;Pandey et al 2015;Muszyńska and Hanus-Fajerska 2016). Metal-tolerant species are unique among vascular plants because of their adaptation to severe conditions as well as high ability to cope with elevated levels of heavy metals in soil or even in the soilless substrate such as waste-heaps.…”

Sediment Heavy Metal Contaminants in Vasai Creek Of Mumbai: Pollution Impacts

“…The behaviour of metals in natural waters is a function of the substrate sediment composition, the suspended sediment composition, and the water chemistry. During their transport, the heavy metals undergo numerous changes in their speciation due to dissolution, precipitation, sorption and complexation phenomena [8,14,15] which affect their behaviour and bioavailability [16,17]. For better understanding of heavy metal sources, their accumulation in the sediment and in water seem to be particularly important issues of present day research on risk assessments.…”

Comparative plant growth promoting traits and distribution of rhizobacteria associated with heavy metals in contaminated soils

“…The interactions between plants and beneficial rhizosphere microorganisms can enhance biomass production and tolerance of the plants to heavy metals, making the microorganisms an important component of phytoremediation technology (Wenzel et al,1999;Glick, 2003;Nouri et al, 2011). The heavy metals are generally toxic to most of the plants for their metabolism and growth, if the heavy metals concentrations exceed the maximum permissible limit.…”