Doria-Manzur Alonso, Sharifan Hamidreza, Tejeda-Benitez Lesly
Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, TX, USA.
Department of Medicine, Research group BIOTOXAM, University of Cartagena, Cartagena, Colombia.
Int J Phytoremediation. 2023;25(1):98-105. doi: 10.1080/15226514.2022.2060934. Epub 2022 Apr 22.
Nickel (Ni) is one of the most toxic metals in human health. Its bioaccumulation in gluten-free crops limits the progressing demand of safe foods for allergic people to gluten. Nanoparticles have shown promising results in enhancing the crop yield and reducing the risk of heavy metal uptake. However, their nanotoxicity has been raised environmental concerns. This study investigated the environmental behavior of Ni (II) with the co-presence of Zinc Oxide Nanoparticles (ZnO-NPs) in s. The plants were exposed to different treatments of Ni, ZnO-NPs, or their coexistence. The uptake experiments were carried out within nine treatments consisting of 1 or 5 ppm Ni alone or in coexistence with 50 or 100 ppm ZnO-NPs. The physiological impacts on plants as potential fingerprints for nanotoxicity were recorded and assessed in a phenotypic spectrum. The total Ni or Zn contents were quantified using atomic absorption. NPs significantly altered the bioavailability of Ni. The results revealed that at 5 ppm Ni contamination, 50 and 100 ZnO-NPs significantly reduced the Ni uptake by ∼43% and 47%, respectively. Further, the results showed at 50 ppm NPs, the phytotoxicity effects of both Ni and NPs may reduce, leading to higher plant dry biomass yield. Characterization of zinc oxide nanotoxicity threshold by developing a phenotypic spectrum. Also, the study revealed the phytoremediation potential of ZnO nanoparticle in mitigating the nickel uptake in a gluten-free crop ().
镍（Ni）是对人类健康毒性最大的金属之一。其在无麸质作物中的生物累积限制了过敏人群对无麸质安全食品日益增长的需求。纳米颗粒在提高作物产量和降低重金属吸收风险方面已显示出有前景的结果。然而，它们的纳米毒性引发了环境方面的担忧。本研究调查了氧化锌纳米颗粒（ZnO-NPs）与镍（II）共存时在土壤中的环境行为。将植物暴露于镍、ZnO-NPs的不同处理或它们的共存环境中。吸收实验在由单独的1或5 ppm镍或与50或100 ppm ZnO-NPs共存的九种处理中进行。在表型谱中记录并评估了对植物的生理影响，将其作为纳米毒性的潜在特征。使用原子吸收法定量总镍或锌含量。纳米颗粒显著改变了镍的生物有效性。结果显示，在5 ppm镍污染下，50和100 ppm的ZnO-NPs分别使镍的吸收显著降低了约43%和47%。此外，结果表明在50 ppm纳米颗粒存在时，镍和纳米颗粒的植物毒性效应可能降低，从而导致更高的植物干生物量产量。通过建立表型谱来表征氧化锌纳米毒性阈值。此外，该研究还揭示了ZnO纳米颗粒在减轻无麸质作物中镍吸收方面的植物修复潜力。
