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首页> 外文期刊>Journal of Hazardous Materials >Adsorption of copper (II), chromium (III), nickel (II) and lead (II) ions from aqueous solutions by meranti sawdust
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Adsorption of copper (II), chromium (III), nickel (II) and lead (II) ions from aqueous solutions by meranti sawdust

机译：柳桉木屑吸附水溶液中的铜（II），铬（III），镍（II）和铅（II）离子

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摘要

The present study proposed the use of meranti sawdust in the removal of Cu(II), Cr(III), Ni(II) and Pb(II) ions from synthetic aqueous solutions. Batch adsorption studies showed that meranti sawdust was able to adsorb Cu(II), Cr(III), Ni(II) and Pb(II) ions from aqueous solutions in the concentration range 1-200 mg/L. The adsorption was favoured with maximum adsorption at pH 6, whereas the adsorption starts at pH 1 for all metal ions. The effects of contact time, initial concentration of metal ions, adsorbent dosage and temperature have been reported. The applicability of Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherm was tried for the system to completely understand the adsorption isotherm processes. The adsorption kinetics tested with pseudo-first-order and pseudo-second-order models yielded high R~2 values from 0.850 to 0.932 and from 0.991 to 0.999, respectively. The meranti sawdust was found to be cost effective and has good efficiency to remove these toxic metal ions from aqueous solution.
机译：本研究建议使用柳桉木屑从合成水溶液中去除Cu（II），Cr（III），Ni（II）和Pb（II）离子。批量吸附研究表明，柳桉木屑能够从浓度范围为1-200 mg / L的水溶液中吸附Cu（II），Cr（III），Ni（II）和Pb（II）离子。在所有pH值为6的条件下，最大吸附均有利于吸附，而所有金属离子的吸附均从pH 1开始。已经报道了接触时间，金属离子的初始浓度，吸附剂量和温度的影响。尝试使用Langmuir，Freundlich和Dubinin-Radushkevich（D-R）等温线的适用性来使系统完全了解吸附等温线过程。用拟一阶和拟二阶模型测试的吸附动力学分别产生较高的R〜2值，分别为0.850至0.932和0.991至0.999。发现柳桉木屑具有成本效益，并且具有从水溶液中去除这些有毒金属离子的良好效率。

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  • 来源
    《Journal of Hazardous Materials》 |2009年第3期|969-977|共9页
  • 作者

    M. Rafatullah; O. Sulaiman; R. Hashim; A. Ahmad;

  • 作者单位

    Division of Bio-resource, Paper and Coatings Technology, School of Industrial Technology, Universiti Sains Malaysia,11800 Penang, Malaysia;

    Division of Bio-resource, Paper and Coatings Technology, School of Industrial Technology, Universiti Sains Malaysia,11800 Penang, Malaysia;

    Division of Bio-resource, Paper and Coatings Technology, School of Industrial Technology, Universiti Sains Malaysia,11800 Penang, Malaysia;

    Division of Environmental Technology, School of Industrial Technology, Universiti Sains Malaysia, 11800 Penang, Malaysia;

  • 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

    toxic metal; adsorption; isotherm; kinetic; intraparticle diffusion;

    机译：有毒金属吸附等温线动力学粒子内扩散;

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