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首页> 外文期刊>Environmental Science & Technology >Enhanced Transport of Phenanthrene and 1-Naphthol by Colloidal Graphene Oxide Nanoparticles in Saturated Soil
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Enhanced Transport of Phenanthrene and 1-Naphthol by Colloidal Graphene Oxide Nanoparticles in Saturated Soil

机译：胶体氧化石墨烯纳米颗粒增强菲在土壤中菲和1-萘酚的迁移

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摘要

With the increasing production and use of graphene oxide, the environmental implications of this new carbonaceous nanomaterial have received much attention. In this study, we found that the presence of low concentrations of graphene oxide nanoparticles (GONPs) significantly enhanced the transport of 1-naphthol in a saturated soil, but affected the transport of phenanthrene to a much smaller extent. The much stronger transport-enhancement effect on 1-naphthol was due to the significant desorption hysteresis (both thermodynami-cally irreversible adsorption and slow desorption kinetics) of GONP-adsorbed 1-naphthol, likely stemmed from the specific polar interactions (e.g., H-bonding) between 1-naphthol and GONPs. Increasing ionic strength or the presence of Cu(Ⅱ) ion (a complexing cation) generally increased the transport-enhancement capability of GONPs, mainly by increasing the aggregation of GONPs and thus, sequestering adsorbed contaminant molecules. Interestingly, modifying GONPs with Suwannee River humic acid or sodium dodecyl sulfate had little or essentially no effect on the transport-enhancement capability of GONPs, in contrast with the previously reported profound effects of humic acids and surfactants on the transport-enhancement capability of C_(60) nanoparticles. Overall, the findings indicate that GONPs in the aquatic environment may serve as an effective carrier for certain organic compounds that can interact with GONPs through strong polar interactions.
机译：随着氧化石墨烯的生产和使用的增加，这种新的碳质纳米材料对环境的影响受到了广泛关注。在这项研究中，我们发现低浓度的氧化石墨烯纳米颗粒（GONPs）的存在显着增强了1-萘酚在饱和土壤中的运输，但对菲的运输影响较小。对1-萘酚的转运增强作用更强是由于GONP吸附的1-萘酚具有明显的解吸滞后作用（热动力学不可逆吸附和缓慢的解吸动力学），这可能是由于特定的极性相互作用（例如H-萘酚和GONP之间的键合）。离子强度的提高或铜（Ⅱ）离子（络合阳离子）的存在通常会提高GONP的转运增强能力，这主要是通过增加GONP的聚集，从而隔离吸附的污染物分子而实现的。有趣的是，用Suwannee River腐殖酸或十二烷基硫酸钠修饰GONP对GONP的转运增强作用几乎没有或基本没有影响，这与之前报道的腐殖酸和表面活性剂对C_的转运增强的深刻影响相反。 60）纳米粒子。总体而言，研究结果表明，水生环境中的GONP可以充当某些有机化合物的有效载体，这些有机化合物可以通过强极性相互作用与GONP相互作用。

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  • 来源
    《Environmental Science & Technology》 |2014年第17期|10136-10144|共9页
  • 作者

    Zhichong Qi; Lei Hou; Dongqiang Zhu; Rong Ji; Wei Chen;

  • 作者单位

    College of Environmental Science and Engineering/Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China;

    College of Environmental Science and Engineering/Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China;

    State Key Laboratory of Pollution Control and Resource Reuse/School of the Environment, Nanjing University, Nanjing, Jiangsu 210093, China;

    State Key Laboratory of Pollution Control and Resource Reuse/School of the Environment, Nanjing University, Nanjing, Jiangsu 210093, China;

    College of Environmental Science and Engineering/Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China;

  • 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);
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