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首页> 外文期刊>RSC Advances >A carbonised sieve-like corn straw cellulose-graphene oxide composite for organophosphorus pesticide removal
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A carbonised sieve-like corn straw cellulose-graphene oxide composite for organophosphorus pesticide removal

机译：用于有机磷农药去除的碳化筛式玉米秸秆纤维素 - 石墨烯氧化物复合材料

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摘要

The development of efficient adsorbents for the removal of organophosphorus pesticides from water is a major challenge. In this work, we prepared an activated carbon derived from sieve-like cellulose/graphene oxide composites (ACCE/G) for the removal of several organophosphorus pesticides. We employed corn straw to produce a sieve-like cellulose-graphene oxide composite (CCE/G); then, by treating CCE/G with potassium hydroxide at high temperatures, the efficient adsorbent ACCE/G was prepared. The adsorption capacity of ACCE/G is higher than those of other sorbents, including a multi-wall carbon nanotube, graphitised carbon black, activated carbon, C18, and primary secondary amine adsorbent. The ACCE/G structure has been fully characterised via scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction and Brunauer-Emmett-Teller analysis. The maximum adsorption capacity of ACCE/G is 152.5 mg g(-1) for chlorpyrifos. The mechanism, the thermodynamic properties, and the kinetics of the adsorption process have been investigated as well. Our findings demonstrate that the adsorption mechanism depends on the electron-donating abilities of the S and P atoms. Moreover, the Langmuir model gives the best fit for the isotherm data, and the adsorption efficiency of the ACCE/G is still over 80% after eight times of recycling, making ACCE/G a valuable candidate for the removal of OPPs.
机译：高效吸附剂从水中去除有机磷农药的发展是一项重大挑战。在这项工作中，我们制备了来自筛状纤维素/石墨烯氧化物复合物（ACCE / G）用于去除几个有机磷农药衍生的活性炭。我们采用玉米秸秆，生产筛选纤维素 - 石墨烯氧化物复合物（CCE / G）;然后，通过在高温下用氢氧化钾处理CCE / g，制备有效吸附剂ACCE / g。 ACCE / g的吸附能力高于其他吸附剂，包括多壁碳纳米管，石墨化的炭黑，活性炭，C18和初级仲胺吸附剂。通过扫描电子显微镜，傅里叶变换红外光谱，X射线光电子能谱，X射线衍射和Brunauer-Emmett-Talleer分析，已经完全表征了ACCE / G结构。 Acce / g的最大吸附容量为氯吡啶酚的152.5mg g（-1）。还研究了机理，热力学性能和吸附过程的动力学。我们的研究结果表明，吸附机理取决于S和P原子的电子赋予能力。此外，Langmuir模型为等温数据提供了最适合的，并且在回收八次的八次仍然超过80％以上的吸附效率，使ACCE / G成为移除OPP的有价值的候选者。

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  • 来源
    《RSC Advances》 |2018年第14期|共9页
  • 作者

    Suo Fengyue; Xie Guixian; Zhang Jie; Li Jingyu; Li Changsheng; Liu Xue; Zhang Yunpeng; Ma Yongqiang; Ji MingShan;

  • 作者单位

    Shenyang Agr Univ Coll Plant Protect Shenyang 110866 Liaoning Peoples R China;

    Hunan Agr Univ Coll Resources &

    Environm Changsha 410128 Hunan Peoples R China;

    China Agr Univ Coll Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Sci Beijing 100193 Peoples R China;

    Shenyang Agr Univ Coll Plant Protect Shenyang 110866 Liaoning Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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