ISSN : 0970 - 020X, ONLINE ISSN : 2231-5039
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Abstract

Decreasing bio-toxicity of fume particles produced in welding process by Aloe Vera L.

Parisa  Ziarati*1, Mohammadhossien Nazif2 and Maryam khanderouy3

DOI : http://dx.doi.org/10.13005/ojc/31.Special-Issue1.14


Abstract:

As Aloe  Vera L.  can easily grow in Iran climates and due to vast probable contaminations from Iranian Natural Gas Transmission Pipelines Industry,   the  main purposes of this study were  to decrease  the risk levels for welders exposed to welding heavy metals  in Iranian Natural Gas Transmission Pipelines Industry and determine the potential ability of A. vera for cleaning up Contaminated  welding sites soil and the  probable capability  of this  plant  to phytoextract different metals (Chrome , Nickel, Copper, Cobalt, Lead and Cadmium) and also determine metal transfer factors from soil (TFS) by  A. Vera  in order to ascertain its  phytoremediation potential. In winter and spring 2015, composite soil samples were  collected from depth of 0-40  cm from soil samples of 5 cites  from 10 sub cites   Assaluyeh (Bushehr Province), Omidieh (Khuzestan Province)  in Iran . The soil for the survey mixed thoroughly, then   transferred to greenhouse in Tehran County. In order to assess amount of heavy metals transfer from soil to plant (shoot and root), translocation factor was determined by dividing metal concentration at shoot by its concentration at root. Metal contents were detected by Atomic Absorption Spectrophotometer by wet digestion method in Research Laboratory in Pharmaceutical Sciences Branch University. Results showed that A. Vera   transition factors for all heavy metals in treated soil were higher than one and A. Vera   can up-take lead and  copper  after 20 days (p<0.01) more than other studied metals. The best result of Cadmium phytoextract was in pH of soil 6.3 by 40 days growth of plants. The maximum Cobalt,  Copper and Nickel uptake rate was in pH= 6.1, 5.9  and 6.3 respectively by 40 day grown A.Vera.

Keywords:

Aloe Vera L.; Phytoextraction; Heavy metals; welding; Clean-up soil

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