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首页> 外文期刊>Journal of Hazardous Materials >Reduction of COD in refinery wastewater through adsorption on date-pit activated carbon
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Reduction of COD in refinery wastewater through adsorption on date-pit activated carbon

机译：通过枣核活性炭吸附减少炼油废水中的COD

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摘要

Experiments were carried out to evaluate the batch adsorption of COD from petroleum refinery wastewater on a locally prepared date-pit activated carbon (DP-AC), and its adsorption effectiveness was compared to that of commercially available BDH activated carbon (BDH-AC). Adsorption equilibrium and kinetic data were determined for both adsorbents and fitted to several adsorption isotherm and kinetics models, respectively. The Langmuir monolayer isotherm fitted well the equilibrium data of COD on both adsorbents; whereas, the kinetics data were best fitted by the pseudo-second order model. Modeling of the controlling mechanisms indicated that both intrinsic kinetics and mass transfer contributed to controlling the adsorption process. Mass transfer seemed to be the dominant mechanism at low COD content, while intrinsic kinetics dominates at high concentrations. In general, the adsorption effectiveness of locally prepared DP-AC was proven to be comparable to that of BDH-AC. Therefore, DP-AC can be utilized as an effective and less expensive adsorbent for the reduction of COD in refinery wastewater.
机译：进行了实验，以评估炼油厂废水中COD在本地制备的枣核活性炭（DP-AC）上的批量吸附，并将其吸附效果与市售BDH活性炭（BDH-AC）进行了比较。确定了两种吸附剂的吸附平衡和动力学数据，并分别拟合到几个吸附等温线和动力学模型。 Langmuir单层等温线很好地拟合了两种吸附剂上COD的平衡数据。而动力学数据最适合拟二阶模型。控制机理的模型表明，内在动力学和传质都有助于控制吸附过程。在低COD含量下，传质似乎是主要的机理，而在高浓度下，内在动力学占主导地位。通常，已证明本地制备的DP-AC的吸附效果与BDH-AC相当。因此，DP-AC可以用作减少炼油厂废水中COD的有效且廉价的吸附剂。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2010年第3期|750-757|共8页
  • 作者

    Muftah H. El-Naas; Sulaiman Al-Zuhair; Manal Abu Alhaija;

  • 作者单位

    Chemical and Petroleum Engineering Department, United Arab Emirates University, 17555 Al-Ain, United Arab Emirates;

    Chemical and Petroleum Engineering Department, United Arab Emirates University, 17555 Al-Ain, United Arab Emirates;

    Chemical and Petroleum Engineering Department, United Arab Emirates University, 17555 Al-Ain, United Arab Emirates;

  • 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

    COD reduction; petroleum refinery; date-pit; controlling mechanism; adsorption;

    机译：减少COD;炼油厂日期坑控制机制吸附;

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