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首页> 外文期刊>Journal of Hazardous Materials >In situ chemical oxidation of BTEX and MTBE by ferrate: pH dependence and stability
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In situ chemical oxidation of BTEX and MTBE by ferrate: pH dependence and stability

机译：高铁酸盐对BTEX和MTBE的原位化学氧化：pH依赖性和稳定性

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摘要

Gasoline spills from underground storage tanks are a worldwide environmental problem. BTEX and MtBE are the compounds of gasoline that present the highest degree of migration due to their chemical properties, and are therefore able to impact groundwater reservoirs. In situ chemical oxidation (ISCO) is an emerging technology for groundwater remediation. Several compounds such as permanganate and hydrogen peroxide among others have been used as oxidants, a strong impact of pH on the relative stabilities and reduction potentials having been in each case determined. This paper presents a study of stability and degradation of BTEX and MtBE at different pH ranges of a novel oxidant for ISCO, potassium ferrate (K2FeO4). To carry out this study, BTEX and MtBE solutions were prepared in different phosphate buffers (pH 5,8; 7; 9; 10 and 11) in concentration ratio of (FeO4-2)/(BTEX+MtBE) = 100:1. Each solution was analyzed at different times by gas chromatography with photoionization and tandem mass spectrometer detector. The results show a higher degree of degradation at pH 7 for Benzene and Toluene, and at pH 9 for Ethyl benzene and Xylenes, while MtBE proved recalcitrant to degradation by ferrate. The most favorable pH for stability of FeO4-2 solution was confirmed in 9-10. (C) 2016 Elsevier B.V. All rights reserved.
机译：来自地下储罐的汽油泄漏是一个全球性的环境问题。 BTEX和MtBE是汽油的化合物，由于其化学性质而具有最高的迁移率，因此能够影响地下水储层。原位化学氧化（ISCO）是一种新兴的地下水修复技术。几种化合物（例如高锰酸盐和过氧化氢）已用作氧化剂，在每种情况下均已确定pH对相对稳定性和还原电位的强烈影响。本文介绍了一种新型ISCO氧化剂高铁酸钾（K2FeO4）在不同pH范围内BTEX和MtBE的稳定性和降解的研究。为了进行这项研究，在（FeO4-2）/（BTEX + MtBE）= 100：1的浓度比例的不同磷酸盐缓冲液（pH 5,8; 7; 9; 10和11）中制备BTEX和MtBE溶液。通过具有光电离和串联质谱检测器的气相色谱法在不同时间分析每种溶液。结果表明，在苯和甲苯的pH值为7时，乙苯和二甲苯的pH值为9时，降解程度更高，而MtBE被证明对高铁酸盐不起作用。 FeO4-2溶液的稳定性最有利的pH值是在9-10。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of Hazardous Materials》 |2017年第ptab期|448-456|共9页
  • 作者

    Pepino Minetti Roberto C.; Macano Hector R.; Britch Javier; Carla Allende M.;

  • 作者单位

    Univ Tecnol Nacl, CIQA Ctr Invest & Transferencia Ingn Quim Ambient, Fac Reg Cordoba, Maestro Marcelo Lopez Esq Ave Cruz Roja Argentina, Cordoba, Argentina;

    Univ Tecnol Nacl, CIQA Ctr Invest & Transferencia Ingn Quim Ambient, Fac Reg Cordoba, Maestro Marcelo Lopez Esq Ave Cruz Roja Argentina, Cordoba, Argentina;

    Univ Tecnol Nacl, CIQA Ctr Invest & Transferencia Ingn Quim Ambient, Fac Reg Cordoba, Maestro Marcelo Lopez Esq Ave Cruz Roja Argentina, Cordoba, Argentina;

    Univ Tecnol Nacl, CIQA Ctr Invest & Transferencia Ingn Quim Ambient, Fac Reg Cordoba, Maestro Marcelo Lopez Esq Ave Cruz Roja Argentina, Cordoba, Argentina;

  • 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
  • 关键词

    In situ chemical oxidation; Ferrate; BTEX; MtBE; Groundwater contamination;

    机译：原位化学氧化;高铁酸盐;BTEX;MtBE;地下水污染;

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