Effects of Nano-TiO₂ particles on bioaccumulation of ¹³³Cs from the contaminated soil by Soybean (<i>Glycine max</i>)

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>This study investigated the effects of nano-TiO<SUB>2</SUB> particles on cesium uptake by soybean plant, which was conducted in a plant growth chamber with adding different concentrations of <SUP>133</SUP>Cs to the soil. This study identified compositional and functional group changes of the elements contained in the soybean root and shoot due to the accumulation of <SUP>133</SUP>Cs. With use of nano-TiO<SUB>2</SUB>, the accumulation of <SUP>133</SUP>Cs identified in the shoot (731.7μg/g dw) was higher than that in the root (597.8μg/g dw). The Cs 3d peaks identified in the XPS spectrum analysis of the shoot and root biomass could be an evident for <SUP>133</SUP>Cs accumulation. The appearance of the new FTIR peaks on the root and shoot biomass can be explained by new bond formation of <SUP>133</SUP>Cs or nano-TiO<SUB>2</SUB> with biomass matrix. Therefore, the application of nano-TiO<SUB>2</SUB> in Cs contaminated soil can significantly enhance <SUP>133</SUP>Cs uptake and its accumulation in plants.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Phytoremediation was one of the safest tools for <SUP>133</SUP>Cs remediation from the soil. </LI> <LI> Application of nano-TiO<SUB>2</SUB> to soil increased the accumulation of <SUP>133</SUP>Cs in soybean. </LI> <LI> FTIR spectra proved variation of the functional groups in different treatments. </LI> <LI> Highest accumulation of <SUP>133</SUP>Cs was found in shoots compared to roots. </LI> <LI> TF value >1 confirms the soybean is favorable for the phytoremediation of <SUP>133</SUP>Cs. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>