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首页> 外文期刊>RSC Advances >Comparison study of biosorption and coagulation/ air flotation methods for chromium removal from wastewater: experiments and neural network modeling
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Comparison study of biosorption and coagulation/ air flotation methods for chromium removal from wastewater: experiments and neural network modeling

机译：生物吸附和空气浮选方法对废水中铬去除的比较研究：实验与神经网络建模

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摘要

This work aims to compare a biosorptionmethod (BM) and a coagulation-dissolved air otationmethod (C/ DAFM) as inexpensive and effective means of eliminating hexavalent chromium (Cr[VI]) from industrial wastewater. Synthetic wastewater containing 1000 mg L~(-1) chromium was used for the experiments. The effect of different parameters (initial pH, amount of adsorbent, and contact time) was investigated for the BM. At optimal conditions (initial pH 3, 7 g adsorbent, and contact time 120 min) maximum Cr(VI) removal was estimated to reach 68.1%. For the C/DAFM, poly aluminum chloride (PAC), and FeCl3 were used as coagulants and the dose was determined by jar test. In optimal conditions of pH 7.5, pressure of 3 bars, and flotation time of 5 min, a maximum of 85% of chromium was extracted. In a comparison of C/DAFM and BM, C/DAFM showed higher ability and greater potential for Cr(VI) removal. Process optimization was carried out using an artificial neural network (ANN) to predict the most favorable conditions of operation for maximum percentage of Cr(VI) removal from wastewater.
机译：该工作旨在将生物吸附方法（BM）和凝固溶解的空气otationMethod（C / Dafm）与消除工业废水中的六价铬（Cr [VI]）的廉价且有效的方法进行比较。含有1000mg L〜（-1）铬的合成废水用于实验。研究了不同参数（初始pH，吸附剂量和接触时间）的效果对BM进行了研究。在最佳条件下（初始pH 3,7g吸附剂和接触时间120分钟）最大Cr（VI）去除估计达到68.1％。对于C / DAFM，将聚氯化铝（PAC）和FECL3用作凝结剂，用罐试验测定剂量。在pH 7.5的最佳条件下，3巴的压力和5分钟的浮选时间，最多含有85％的铬。在C / DAFM和BM的比较中，C / DAFM显示出更高的能力和更大的CR（VI）的潜力。使用人工神经网络（ANN）进行过程优化以预测最有利的操作条件，以获得从废水中除去的最大百分比的Cr（vi）。

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  • 来源
    《RSC Advances》 |2015年第111期|共9页
  • 作者

    Akbar Esmaeili; Elahe Hejazi; Yasser Vasseghianb;

  • 作者单位

    Department of Chemical Engineering North Tehran Branch Islamic Azad University PO Box 19585/936 Tehran Iran.;

    Department of Chemical Engineering North Tehran Branch Islamic Azad University PO Box 19585/936 Tehran Iran.;

    Chemical Engineering Department Faculty of Engineering Razi University Kermanshah Iran;

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  • 正文语种 eng
  • 中图分类 化学;
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