Dwivedi, Amarendra Dhar Yoon, Hakwon Singh, Jitendra Pal Chae, Keun Hwa Rho, Sang-chul Hwang, Dong Soo Chang, Yoon-Seok 2024-01-19T22:00:50Z 2024-01-19T22:00:50Z 2021-09-03 2018-09-04 0013-936X https://pubs.kist.re.kr/handle/201004/120932 Here, we investigated the fate of nanoscale zerovalent iron (nZVI) on the Cucumis sativus under both hydroponic and soil conditions. Seedlings were exposed to 0, 250, and 1000 mg/L (or mg/kg soil) nZVI during 6-9 weeks of a growth period. Ionic controls were prepared using Fe-EDTA. None of the nZVI treatments affected the plant biomass. On the basis of the total iron contents and the superparamagnetic property of nZVI-exposed roots, there was no evidence of pristine nZVI translocation from the roots to shoots. Electron microscopy revealed that the transformed iron nanoparticles are stored in the root cell membrane and the vacuoles of the leaf parenchymal cells. X-ray absorption spectroscopy identified ferric citrate (41%) and iron (oxyhydr)oxides (59%) as the main transformed products in the roots. The shoot samples indicated a larger proportion of ferric citrate (60%) compared to iron (oxyhydr)oxides (40%). The 1.8-fold higher expression of the CsHA1 gene indicated that the plant-promoted transformation of nZVI was driven by protons released from the root layers. The current data provide a basis for two potential nZVI transformation pathways in Cucumis sativus: (1) interaction with low molecular weight organic acid ligands and (2) dissolution-precipitation of the mineral products. English American Chemical Society ZERO-VALENT IRON RAY-ABSORPTION SPECTROSCOPY ENGINEERED NANOMATERIALS IMPERATA-CYLINDRICA CERIA NANOPARTICLES ZNO NANOPARTICLES FATE NZVI NANO RHIZOSPHERE Uptake, Distribution, and Transformation of Zerovalent Iron Nanoparticles in the Edible Plant Cucumis sativus Article 10.1021/acs.est.8b01960 1 Environmental Science & Technology, v.52, no.17, pp.10057 - 10066 Environmental Science & Technology 52 17 10057 10066 scie scopus 000444061100055 2-s2.0-85052283587 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article ZERO-VALENT IRON RAY-ABSORPTION SPECTROSCOPY ENGINEERED NANOMATERIALS IMPERATA-CYLINDRICA CERIA NANOPARTICLES ZNO NANOPARTICLES FATE NZVI NANO RHIZOSPHERE Zerovalent Iron Cucumis sativus X-ray Absorption Spectroscopy