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首页> 外文期刊>Journal of Hazardous Materials >Application of Central Composite Design approach for removal of chromium (VI) from aqueous solution using weakly anionic resin: Modeling, optimization, and study of interactive variables
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Application of Central Composite Design approach for removal of chromium (VI) from aqueous solution using weakly anionic resin: Modeling, optimization, and study of interactive variables

机译：中心复合设计方法在使用弱阴离子树脂去除水溶液中铬（VI）中的应用：建模，优化和交互变量研究

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摘要

In this paper, response surface methodology (RSM) approach using Central Composite Design (CCD) is applied to develop mathematical model and optimize process parameters for Cr (VI) removal from aqueous streams using weakly anionic resin Amberlite IRA 96. The individual and combined effect of four process parameters, i.e. contact time, initial solution pH, initial Cr (VI) concentration and resin dose on Cr adsorption were studied. Analysis of variance (ANOVA) showed the relative significance of process parameters in removal process. Initial solution pH and resin dose were found to be more significant than contact time and initial Cr (VI) concentration. The second-order regression model was developed to predict the removal efficiency using Design Expert software. The optimal conditions to remove Cr from aqueous solution at constant temperature of 30℃ and stirring speed of 250 rpm were found to be contact time 62.5 min, pH 1.96, initial Cr (VI) concentration 145.4mg/L, and resin dose 8.51 g/L. At these conditions, high removal efficiency (93.26%) was achieved. FTIR and EDX analysis were conducted to interpret the functional groups involved during the Cr-resin interaction.
机译：在本文中，应用了使用中央复合设计（CCD）的响应表面方法（RSM）方法来开发数学模型并优化使用弱阴离子树脂Amberlite IRA 96从水流中去除六价铬的工艺参数。单独和组合的作用研究了四个工艺参数，即接触时间，初始溶液pH，初始Cr（VI）浓度和树脂吸附Cr的剂量。方差分析（ANOVA）显示了去除过程中工艺参数的相对重要性。发现初始溶液的pH和树脂剂量比接触时间和初始Cr（VI）浓度更为重要。使用Design Expert软件开发了二阶回归模型以预测去除效率。发现在30℃恒温和250 rpm的搅拌速度下从水溶液中去除Cr的最佳条件是接触时间62.5 min，pH 1.96，初始Cr（VI）浓度145.4mg / L和树脂剂量8.51 g /。 L.在这些条件下，获得了很高的去除效率（93.26％）。进行了FTIR和EDX分析，以解释Cr-树脂相互作用过程中涉及的官能团。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.436-444|共9页
  • 作者

    Shailendra Bajpai; S.K. Gupta; Apurba Dey; M.K.Jha; Vidushi Bajpai; Saurabh Joshi; Arvind Gupta;

  • 作者单位

    Department of Chemical Engineering. National Institute ofTechnology, Jatandhar, India;

    Department of Chemical Engineering. Indian Institute of Technology. Delhi, India;

    Department of Bio Technology, National Institute of Technology, Durgapur, India;

    Department of Chemical Engineering. National Institute ofTechnology, Jatandhar, India;

    Department of Chemical Engineering. National Institute ofTechnology, Jatandhar, India;

    Department of Chemical Engineering. National Institute ofTechnology, Jatandhar, India;

    Department of Chemical Engineering. National Institute ofTechnology, Jatandhar, India;

  • 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

    response surface methodology; central composite design; synthetic resins; ion exchange;

    机译：响应面方法中央复合设计;合成树脂;离子交换;

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