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. 2020 Jun 9;8(7):3673-3681.
doi: 10.1002/fsn3.1651. eCollection 2020 Jul.

Fate of Fe3O4@NH2 in soil and their fixation effect to reduce lead translocation in two rice cultivars

Chenlu Chu  1 , Chenhao Lu  1 , Jian Yuan  1 , Changrui Xing  1
Affiliations

Fate of Fe3O4@NH2 in soil and their fixation effect to reduce lead translocation in two rice cultivars

Chenlu Chu et al. Food Sci Nutr. .

Abstract

The fate of nanoparticles in the ecological chain of agriculture has been concerned as their potential pollution and biological effect to humans with rapid development and massive emission of nanomaterials. Here, we found that two rice cultivars (Oryza sativa L) have different heavy metal accumulation results in the roots and shoots after 15 days growth. Two rice cultivars (Oryza sativa L), grown in soil containing magnetite (Fe3O4@NH2) nanoparticles and heavy metal simultaneous, showed less Pb uptake in the roots and shoots, compared with that without Fe3O4@NH2 added. The shape and magnetic properties of Fe3O4@NH2 have no obvious change; however, the transmission electron microscope (TEM) results showed the shell of Fe3O4@NH2 could be broken in the process of interaction with soil. These results suggested that magnetite nanoparticles, such as Fe3O4@NH2, could potentially be used as the recyclable heavy metal fixation materials for alleviating heavy metal poisoning to plant.

Keywords: Fe3O4@NH2; Oryza sativa L; fixation; lead; soil.

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Conflict of interest statement

Authors declare no conflict of interest.

Figures

Figure 1
Figure 1
The TEM and SEM analysis of Fe3O4 NPs (a) and (b), Fe3O4@NH2 NPs (c) and (d), and Fe3O4@NH2 NPs with 0.01 M HCl treatment for 15 days (e) and (f)
Figure 2
Figure 2
The concentrations of Pb, Cd, and As in the roots and shoots of Nanjing 46 (a) and Nanjing 9108 (b) obtained from heavy metal polluted soil
Figure 3
Figure 3
SEM of Fe3O4@NH2 NPs treated with 0.01 M PBS (a) and soil leaching fluid (b) for 15 days. SEM of Fe oxides separated from soil (c). SEM (d), TEM (e) and (f) and SEM‐EDX (g) of Fe3O4@NH2 NPs recycled from soil
Figure 4
Figure 4
The Pb concentration in the roots and shoots of Nanjing 46 (a) and (b) and Nanjing 9108 (c) and (d) obtained from soil containing magnetite (Fe3O4@NH2) nanoparticles with or without Pb added
See this image and copyright information in PMC

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