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首页> 外文期刊>Applied Surface Science >Surface modification and characterization of Jordanian kaolinite: Application for lead removal from aqueous solutions
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Surface modification and characterization of Jordanian kaolinite: Application for lead removal from aqueous solutions

机译：约旦高岭石的表面改性和表征：从水溶液中去除铅的应用

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摘要

Kaolinite clay was tested for removal of lead ions from aqueous solution. This clay was washed with sulfuric acid solution followed by chemical surface modification using 3-chloropropyltriethoxysilane and sodium hydroxide. XRF results showed that silica to alumina ratio was 2.8:1 for the treated sample compared to 1.6:1 for the raw one.rnXRD analysis displayed different distinct kaolinite and quartz peaks before treatment while kaolinite peaks were diminished after the treatment. SEM morphology indicated that the raw kaolinite appears as plate structure with no local pores on the plates. However, after treatment the surface was found to have micropores.Different adsorption isotherm models were applied to the experimental data and found that Shawabkeh-Tutunji equation best fit these data adequately. It was also found that chemisorption took place at the surface of the modified kaolinite with maximum adsorption capacity of 54.35 mg/g.
机译：测试了高岭石粘土从水溶液中去除铅离子的能力。该粘土用硫酸溶液洗涤，然后使用3-氯丙基三乙氧基硅烷和氢氧化钠进行化学表面改性。 XRF结果表明，处理后的样品中二氧化硅与氧化铝的比例为2.8：1，而未处理的样品为1.6：1。rnXRD分析显示，处理前的高岭石和石英峰不同，而处理后的高岭石峰减小。 SEM形态表明，原始高岭石以板状结构出现，板上没有局部孔。然而，在处理之后，发现表面具有微孔。将不同的吸附等温线模型应用于实验数据，发现Shawabkeh-Tutunji方程最适合这些数据。还发现化学吸附发生在改性高岭石的表面上，最大吸附容量为54.35 mg / g。

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  • 来源
    《Applied Surface Science》 |2009年第18期|8098-8103|共6页
  • 作者

    Mohammad Al-Harahsheh; Reyad Shawabkeh; Adnan Al-Harahsheh; Khalid Tarawneh; Marwan M. Batiha;

  • 作者单位

    College of Mining and Environmental Engineering, Al-Hussein Bin Talal University, Ma'an 7111, PO Box 20 Jordan;

    Department of Chemical Engineering, King Fahd University of Petroleum & Minerals, Dhahrart, Saudi Arabia Department of Chemical Engineering, Mutah University, Karak, Jordan;

    Department of Chemical Engineering, Mutah University, Karak, Jordan;

    College of Mining and Environmental Engineering, Al-Hussein Bin Talal University, Ma'an 7111, PO Box 20 Jordan;

    College of Mining and Environmental Engineering, Al-Hussein Bin Talal University, Ma'an 7111, PO Box 20 Jordan;

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  • 正文语种 eng
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  • 关键词

    lead removal; kaolinite; adsorption; surface modification;

    机译：除铅高岭石吸附表面改性;

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