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首页> 外文期刊>Environmental Science & Technology >Effect of Particulate Matter Mineral Composition on Environmentally Persistent Free Radical (EPFR) Formation
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Effect of Particulate Matter Mineral Composition on Environmentally Persistent Free Radical (EPFR) Formation

机译：颗粒物矿物成分对环境持久性自由基（EPFR）形成的影响

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摘要

Environmentally Persistent Free Radicals (EPFRs) are newly discovered, long-lived surface bound radicals that form on particulate matter and combustion borne particulates, such as fly ash. Human exposure to such particulates lead to translocation into the lungs and heart resulting in cardio-vascular and respiratory disease through the production of reactive oxygen species. Analysis of some waste incinerator fly ashes revealed a significant difference between their EPFR contents. Although EPFR formation occurs on the metal domains, these differences were correlated with the altering concentration of calcium and sulfur. To analyze these phenomena, surrogate fly ashes were synthesized to mimic the presence of their major mineral components, including metal oxides, calcium, and sulfur. The results of this study led to the conclusion that the presence of sulfates limits formation of EPFRs due to inhibition or poisoning of the transition metal active sites necessary for their formation. These findings provide a pathway toward understanding differences in EPFR presence on particulate matter and uncover the possibility of remediating EPFRs from incineration and hazardous waste sites.
机译：环境持久性自由基（EPFR）是新发现的，长寿命的表面结合自由基，其形成于颗粒物和燃烧传播的颗粒物（例如飞灰）上。人体暴露于此类颗粒会导致易位进入肺部和心脏，并通过产生活性氧而导致心血管疾病和呼吸道疾病。对一些垃圾焚烧炉粉煤灰的分析显示，它们的EPFR含量之间存在显着差异。尽管EPFR形成发生在金属域上，但这些差异与钙和硫的浓度变化相关。为了分析这些现象，合成了替代粉煤灰以模拟其主要矿物成分的存在，包括金属氧化物，钙和硫。这项研究的结果得出的结论是，硫酸盐的存在限制了EPFR的形成，这是由于其形成所必需的过渡金属活性位被抑制或中毒所致。这些发现为理解颗粒物中EPFR存在的差异提供了一条途径，并揭示了从焚烧场和危险废物场修复EPFR的可能性。

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  • 来源
    《Environmental Science & Technology》 |2017年第18期|10396-10402|共7页
  • 作者

    Elisabeth E. Feld-Cook; Lisa Bovenkamp-Langlois; Slawo M. Lomnicki;

  • 作者单位

    Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States;

    Center for Advanced Microstructures & Devices (CAMD), Louisiana State University, Baton Rouge, Louisiana 70803, United States;

    Department of Environmental Sciences, Louisiana State University, Baton Rouge, Louisiana 70803, United States;

  • 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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  • 正文语种 eng
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