Stabilized Nanoscale Zerovalent Iron Mediated Cadmium Accumulation and Oxidative Damage of Boehmeria nivea (L.) Gaudich Cultivated in Cadmium Contaminated Sediments,Environmental Science & Technology

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Stabilized Nanoscale Zerovalent Iron Mediated Cadmium Accumulation and Oxidative Damage of Boehmeria nivea (L.) Gaudich Cultivated in Cadmium Contaminated Sediments
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2017-09-12 00:00:00 , DOI: 10.1021/acs.est.7b03164
Xiaomin Gong _{1,

2} , Danlian Huang _{1,

2} , Yunguo Liu _{1,

2} , Guangming Zeng _{1,

2} , Rongzhong Wang _{1,

2} , Jia Wan _{1,

2} , Chen Zhang _{1,

2} , Min Cheng _{1,

2} , Xiang Qin _{1,

2} , Wenjing Xue _{1,

2}

Affiliation

Nanoparticles can be absorbed by plants, but their impacts on phytoremediation are not yet well understood. This study was carried out to determine the impacts of starch stabilized nanoscale zerovalent iron (S-nZVI) on the cadmium (Cd) accumulation and the oxidative stress in Boehmeria nivea (L.) Gaudich (ramie). Plants were cultivated in Cd-contaminated sediments amended with S-nZVI at 100, 500, and 1000 mg/kg, respectively. Results showed that S-nZVI promoted Cd accumulation in ramie seedlings. The subcellular distribution result showed that Cd content in cell wall of plants reduced, and its concentration in cell organelle and soluble fractions increased at S-nZVI treatments, indicating the promotion of Cd entering plant cells by S-nZVI. In addition, the 100 mg/kg S-nZVI alleviated the oxidative damage to ramie under Cd-stress, while 500 and 1000 mg/kg S-nZVI inhibited plant growth and aggravated the oxidative damage to plants. These findings demonstrate that nanoparticles at low concentration can improve the efficiency of phytoremediation. This study herein develops a promising novel technique by the combined use of nanotechnology and phytoremediation in the remediation of heavy metal contaminated sites.

中文翻译：

镉污染沉积物中培养的稳定的纳米级零价铁介导的镉积累和and虫（Boehmeria nivea（L.）Gaudich）的氧化损伤

纳米颗粒可以被植物吸收，但是它们对植物修复的影响尚不十分清楚。本研究进行，以确定在镉淀粉稳定的纳米级零价铁（S-的nZVI）的影响（Cd）的积累和在氧化应激苎（L.）高迪（（麻）。将植物种植在被S-nZVI分别以100、500和1000 mg / kg修正的Cd污染的沉积物中。结果表明，S-nZVI促进了麻幼苗中Cd的积累。亚细胞分布结果表明，S-nZVI处理降低了植物细胞壁中Cd含量，增加了其细胞器中的浓度和可溶性级分，表明S-nZVI促进了Cd进入植物细胞。此外，100 mg / kg S-nZVI减轻了镉胁迫下麻的氧化损伤，而500和1000 mg / kg S-nZVI抑制了植物的生长并加剧了对植物的氧化损伤。这些发现表明低浓度的纳米颗粒可以提高植物修复的效率。

更新日期：2017-09-12

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