Journal of Environmental Health and Sustainable Development
مجله بهداشت محیط و توسعه پایدار
J Environ Health Sustain Dev
Medical Sciences
http://jehsd.ssu.ac.ir
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2025
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Phytoremediation of Uranium-238 and Thorium-232 in Contaminated Soils Using Native Dryland Shrubs
Solid remediation and wastes
Original articles
<div style="text-align: justify;"><span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:"Aptos","sans-serif""><b><i><span style="font-size:10.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman","serif"">Introduction:</span></span></span></i></b><b> </b><span style="font-size:10.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman","serif"">This study investigated the phytoremediation potential of <i>Atriplex canescens</i>, <i>Haloxylon aphyllum</i>, and <i>Nitraria schoberi</i> for decontaminating soil polluted with radioactive elements.</span></span></span></span></span></span><br>
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:"Aptos","sans-serif""><b><i><span style="font-size:10.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman","serif"">Materials and Methods:</span></span></span></i></b><span style="font-size:10.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman","serif""> Contaminated soil was collected from a uranium mine site. Compost and sawdust were used as soil amendments. Radionuclide activities and concentrations were determined using gamma spectrometry and ICP-MS.</span></span></span></span></span></span><br>
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:"Aptos","sans-serif""><b><i><span style="font-size:10.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman","serif"">Results:</span></span></span></i></b><span style="font-size:10.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman","serif""> <i>H. aphyllum</i> demonstrated the highest uptake of radioactive elements, accumulating 58 mg.kg<sup>-1</sup> of Th-232 and 28.08 mg.kg<sup>-1</sup> of U-238, respectively. Considering their initial concentrations, the thorium removal efficiency was higher than that of uranium, with a maximum of 85% for Th-232 achieved by <i>H. aphyllum</i>. Plant roots accumulated higher concentrations of radionuclides than the stems. A comparison of phytoremediation factors (TF, BAF, and BCF) indicated that <i>H. aphyllum</i> had a greater stabilization potential than the other two species. Furthermore, phytoextraction was identified as the dominant remediation mechanism.</span></span></span></span></span></span><br>
<b><i><span style="font-size:10.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman","serif"">Conclusion:</span></span></span></i></b><span style="font-size:10.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman","serif""> Compost application enhanced the phytostabilization potential of all three plants (e.g., as indicated by the increase in BCF, which reached a maximum of 0.45 for <i>H. aphyllum</i>). In contrast, sawdust had an inhibitory effect, likely due to the disruption of the C/N ratio, which prevented plant growth. <i>H. aphyllum</i> showed significant potential for radioactive soil rehabilitation, particularly when it was amended with compost.</span></span></span></div>
Phytoremediation,Radioactive Waste,Uranium-238,Thorium-232,SoilComposting.
2757
2770
http://jehsd.ssu.ac.ir/browse.php?a_code=A-10-97-6&slc_lang=en&sid=1
Javad
Rabee Haghighi
rabi.24166@chmail.ir