Mahshid Souri; Mina Bayat; Saedeh Nateghi
Abstract
Increasing expansion of the industry and mining activities has caused an increase in environmental pollution, and these pollutions through water, air, as well as through the entry of sewage and waste into the soil, have irreparable effects and consequences on natural ecosystems. This research was conducted ...
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Increasing expansion of the industry and mining activities has caused an increase in environmental pollution, and these pollutions through water, air, as well as through the entry of sewage and waste into the soil, have irreparable effects and consequences on natural ecosystems. This research was conducted with the aim of investigating the phytoremediation potential of the rangeland species Artemisia sieberi, Salsola richteri and Scariola orientalis, as well as investigating the concentration of heavy metals (zinc, nickel and arsenic) in the soil of Sangan iron mine in Khorasan Razavi province. First, based on the initial investigation of vegetation distribution along the ecological gradient of the region, the dominant plant types were determined. Then, samples were taken from different parts of the dominant plant species of Khaf area and the soil around their roots at different distances from the mine in the direction of the prevailing wind of the area. Oxidation method and inductively coupled plasma device were used to measure the amount of metal pollution in the collected samples. Then, in order to evaluate and check the ability of the selected plants in cleaning the environment from different metals, several different indicators of plant remediation were investigated.The results showed that the high concentration of elements such as nickel (29 mg/kg) and arsenic (10 mg/kg) is significant compared to the global average of nickel 18 mg/kg and arsenic 4.7 mg/kg. Based on the results of bioconcentration indicators and considering the high abundance of native species Salsola richteri compared to the other two investigated species, this species can be used to phytoremidiation of heavy metals zinc, nickel and arsenic in Sangan mines
maasoumeh movaghari; Leila Khalasi; Amin Zoratipoor; fereshteh yazdanpanah
Abstract
This study was carried out around Zooir oil well in Khouzestan to investigate the concentration of heavy metals (Pb, Cu, Zn, Cd) in soil and two species of plants (Alhagi camelorum and Cornulaca monacantha), two directions of dominant wind and opposite direction of dominant wind and three distances from ...
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This study was carried out around Zooir oil well in Khouzestan to investigate the concentration of heavy metals (Pb, Cu, Zn, Cd) in soil and two species of plants (Alhagi camelorum and Cornulaca monacantha), two directions of dominant wind and opposite direction of dominant wind and three distances from oil well. The results showed that the concentration of lead, copper and zinc of soil in the wind direction was significantly higher than the opposite wind direction, whereas in the concentration of these elements in the plant, there was no significant effect. This is exactly opposite in the case of cadmium metal. The concentrations of the studied metals in both soil and plants collected from different distances were significantly different at 1% level. The two lead and zinc metals have significant differences in the surface and deep soils, but these were no significant for the cadmium and copper metals as well as in the soils under and between the plants. Heavy metal uptake was no significant effect in the two studied species, but this difference was significant between the shoots and roots. Cadmium and copper have the highest concentration in roots. Lead and zinc have the highest concentration in aerial parts. Evaluation of accumulation and transport factors showed that lead, zinc and cadmium in Cornulaca mocnaantha and lead and zinc in Alhagi camelorum had TF> 1 coefficients, so they could be used to refine soils polluted with these elements. BAC and BCF values for both species were less than one.
