Plant-mediated synthesis of highly active iron nanoparticles for Cr (VI) removal: Investigation of the leading biomolecules
Plant-mediated synthesis of highly active iron nanoparticles for Cr (VI) removal: Investigation of the leading biomolecules
复制标题
植物介导的高活性铁纳米颗粒的合成用于去除 Cr (VI)：主要生物分子的研究
DOI：
10.1016/j.chemosphere.2016.02.056
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发表时间：
2016
期刊：
影响因子：
8.8
通讯作者：
Sun Daohua
中科院分区：
文献类型：
--
作者：
Xiao Zhengli;Yuan Min;Yang Bin;Liu Zhaoyan;Huang Jiale;Sun Daohua
具有较高活性和稳定性的铁纳米粒子的生态友好合成和应用在污染物修复领域引起了广泛的关注。在这项工作中，选择了15种植物提取物用于植物介导的铁纳米颗粒的合成。采用透射电子显微镜、X射线衍射仪和紫外-可见吸收光谱仪对合成粒子的形貌和结构进行了表征。测定了15种提取物中4种主要活性生物分子的含量，并进一步进行了比较研究，明确了与还原能力密切相关的关键组分。结果表明，多酚是参与铁纳米颗粒生物合成的主要成分。然后将三种多酚含量不同的提取物合成的铁产物用于去除水溶液中的Cr（VI），表明铁纳米颗粒对Cr（VI）的去除活性与提取物的还原能力一致。此外，S. jambos（L.）Alstonextract（SJA-Fe NPs）对Cr（VI）的去除效果显著，每克铁中Cr（VI）的去除量为698.6 mg.
The eco-friendly synthesis and application of Fe nanoparticles (Fe NPs) with higher activity and stability has aroused wide attention in the field of pollutant remediation. In this work, 15 plants extracts were selected for the plant-mediated synthesis of Fe NPs. The as-synthesized particles’ morphology and structure were characterized by transmission electron microscopy, X-ray diffraction and UV–Vis spectroscopy. The contents of four main active biomolecules in the 15 extracts were determined, and comparative studies were further carried out to clarify the key component closely related to the reducing capacity. The results demonstrate that polyphenol is the leading ingredient involved in the biosynthesis of Fe NPs. Then Fe products synthesized by three extracts with distinct content of polyphenol were employed to remove Cr (VI) in the aqueous solution, indicating that the activity of the Fe NPs for Cr (VI) removal is consistent with the reducing capacity of the extracts. Furthermore, the Fe NPs synthesized byS. jambos(L.)Alstonextract (SJA-Fe NPs) showed significant removal capacity of Cr(VI) with 698.6 mg Cr(VI) per g of iron.