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Impact of Natural Organic Matter on the Physicochemical Properties of Aqueous C_(60) Nanoparticles

机译:天然有机物对水性C_(60)纳米粒子理化性质的影响

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摘要

Existing toxicity data indicate that industrial-scale production of C_(60) fullerene poses a potential threat to the environment. Evaluating the environmental impact of C_(60) requires careful characterization of its physicochemical properties in the natural aqueous environment. Our study aims to determine the effects of aquatic natural organic matter (NOM) on the physicochemical properties of aqueous C_(60) nanoparticles, nC_(60)-Stable nC_(60) suspensions were formed using three different solvent exchange protocols. They were thoroughly characterized for particle size, morphology, and electrophoretic mobility in the absence or presence of two model NOM components, Suwannee River humic acid and fulvic acid. NOM caused disaggregation of nC_(60) crystals and aggregates under typical solution conditions of natural water, leading to significant changes in particle size and morphology. Such effect increased with increasing NOM concentration. The changes in nC_(60) size and morphology strongly depended on the nC_(60) formation pathway. Results from this study indicate that NOM may play a critical role in the transport and toxicity of C_(60) in the natural aqueous environment.
机译:现有的毒性数据表明,工业规模生产C_(60)富勒烯会对环境造成潜在威胁。评估C_(60)的环境影响需要仔细表征其在天然水环境中的物理化学性质。我们的研究旨在确定水生天然有机物(NOM)对水性C_(60)纳米颗粒的理化特性的影响,使用三种不同的溶剂交换方案形成了nC_(60)-稳定nC_(60)悬浮液。在不存在两种模型NOM成分(Suwannee River腐殖酸和黄腐酸)的情况下,对它们的粒径,形态和电泳迁移率进行了全面表征。在自然水的典型溶解条件下,NOM导致nC_(60)晶体和聚集体解聚,从而导致粒径和形态发生显着变化。这种效果随着NOM浓度的增加而增加。 nC_(60)大小和形态的变化在很大程度上取决于nC_(60)的形成途径。这项研究的结果表明,在天然水环境中,NOM可能在C_(60)的运输和毒性中起关键作用。

著录项

  • 来源
    《Environmental Science & Technology》 |2008年第8期|p.2853-2859|共7页
  • 作者单位

    Department of Civil and Environmental Engineering , Rice University, Houston Texas 77005;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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