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首页> 外文期刊>Journal of Hazardous Materials >MgAl layered double oxide: One powerful sweeper of emulsified water and acid for oil purification
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MgAl layered double oxide: One powerful sweeper of emulsified water and acid for oil purification

机译：MgAl层状双氧化物：一种强大的乳化水和酸清除剂，用于油的净化

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摘要

We exploit a novel role of MgAl-layered double oxide (LDO) as a powerful sweeper to remove trace emulsified water and organic acids from contaminated oil. Notably, 0.4 g of LDO enable to purify 20 mL of contaminated oil with 0.2 g of water and 0.1 mL of octanoic acid, and the separation efficiency reaches 94.6 and 28.2%, respectively. The separation process is initiated with the immobilization of water droplets at the crystalline matrix of LDO (driven by the unique water memory effect), accompanied by the LDO converted to MgAl-layered double hydroxide (LDH). LDH possesses a high point of zero charge and abundant OH- and Mg2+/AL(3+) on its layered surface, which enables it to remove the acids via neutralization and complexing reactions. The immobilized water and adsorbed acids are eventually swept by collecting the solids. The collected solids, mainly composed of LDH, can be regenerated to LDO for recycle through a calcination process. Economy evaluation reveals it takes $6.7 for LDO to purify every cubic meters of emulsion, much more cost-effective than the reported CaSO4 center dot 0.5H(2)O and Fe3O4-based adsorbents. The robust performance with the competitive economy points to the high potential of LDO for oil regeneration.
机译：我们利用MgAl层状双氧化物（LDO）的新型作用作为强大的清扫机，以从污染的油中去除痕量的乳化水和有机酸。值得注意的是，0.4 g LDO可以用0.2 g水和0.1 mL辛酸纯化20 mL的污染油，分离效率分别达到94.6％和28.2％。分离过程是通过将水滴固定在LDO的晶体基质上（由独特的水记忆效应驱动）而启动的，同时将LDO转化为MgAl层状双氢氧化物（LDH）。 LDH在其层状表面上具有零电荷高点和丰富的OH-和Mg2 + / AL（3+），使其能够通过中和和络合反应除去酸。固定的水和吸附的酸最终通过收集固体而被清除。收集的主要由LDH组成的固体可以通过煅烧过程再生为LDO，以进行再循环。经济评估表明，LDO净化每立方米乳液需要6.7美元，比报道的CaSO4中心点0.5H（2）O和Fe3O4基吸附剂更具成本效益。强劲的性能和具有竞争力的经济性表明LDO在石油再生方面具有很大的潜力。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2019年第5期|658-667|共10页
  • 作者

    Jiang Guangming; Fu Wenyang; Shu Song; Zhang Zhiyong; Zhang Sen; Zhang Yuxin; Zhang Xianming; Dong Fan; Lv Xiaoshu;

  • 作者单位

    Chongqing Technol & Business Univ, Engn Res Ctr Waste Oil Recovery Technol & Equipme, Minist Educ, Chongqing 400067, Peoples R China;

    Chongqing Technol & Business Univ, Engn Res Ctr Waste Oil Recovery Technol & Equipme, Minist Educ, Chongqing 400067, Peoples R China;

    Chongqing Technol & Business Univ, Engn Res Ctr Waste Oil Recovery Technol & Equipme, Minist Educ, Chongqing 400067, Peoples R China;

    Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA;

    Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA;

    Chongqing Univ, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China;

    Chongqing Technol & Business Univ, Engn Res Ctr Waste Oil Recovery Technol & Equipme, Minist Educ, Chongqing 400067, Peoples R China;

    Chongqing Technol & Business Univ, Engn Res Ctr Waste Oil Recovery Technol & Equipme, Minist Educ, Chongqing 400067, Peoples R China;

    Chongqing Technol & Business Univ, Engn Res Ctr Waste Oil Recovery Technol & Equipme, Minist Educ, Chongqing 400067, Peoples R 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Environmental remediation; Oil regeneration; Oil/water separation; Acid removal; Layered double oxide;

    机译：环境修复;油脂再生;油水分离;除酸;分层双氧化物;

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