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首页> 外文期刊>Journal of Polymers and the Environment >Bio-sorptive Removal of Methyl Orange by Micro-Grooved Chitosan (GCS) Beads: Optimization of Process Variables Using Taguchi L9 Orthogonal Array
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Bio-sorptive Removal of Methyl Orange by Micro-Grooved Chitosan (GCS) Beads: Optimization of Process Variables Using Taguchi L9 Orthogonal Array

机译：通过微槽壳聚糖（GCS）珠子的生物吸附除去甲基橙：使用Taguchi L9正交阵列进行过程变量的优化

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摘要

Batch biosorption studies of methyl orange (MO) dye removal using newly formed micro-grooved chitosan (GCS) gel beads were synthesized by using NaOH-based gelling solution supplemented with Na2CO3 at different volume ratios (v/v) of NaOH-to-Na2CO3. The newly formed GCS gel beads with the best adsorption capacity corresponding to the volume ratio of NaOH-Na2CO3 were selected as potential biosorbent in subsequent adsorption studies. Taguchi orthogonal array of L9 (3(3)) was adopted to investigate the simultaneous variations of three controlling factors, namely: pH of MO (pH 3, 7, 11), initial concentration of MO (30 ppm, 50 ppm, 90 ppm) and new GCS adsorbent dosage (0.35 g, 0.5 g, 1 g). The dye removal percentage (removal%) was found to be between (30.09 +/- 4.66)% and (98.15 +/- 0.23)%. The average uptake capacity (q(e)) of MO by GCS adsorbent was varied from (1.22 +/- 0.03)mg/g to (9.14 +/- 0.00)mg/g. The highest mean of S/N ratio was selected to obtain maximum adsorption performance. The optimum operating condition for the highest removal% was achieved at pH 3 with 1 g of adsorbent dosage and 30 ppm of MO concentration, whereas the maximum q(e) was identified at pH 3 with adsorbent dose of 0.35 g and 90 ppm of MO concentration. The morphology of GCS gel beads before and after adsorption was analysed using field emission scanning electron microscopy (FESEM). The adsorption results were best fit to two parameter Harkins-Jura isotherm (R-2 = 0.9979). This affirmed that the adsorption of MO dye solution by GCS gel beads was a multilayer adsorption.
机译：使用新形成的微槽壳聚糖（GCS）凝胶珠子的甲基橙（Mo）染料去除的分批生物吸附研究是通过使用NaOH-〜Na 2 CO 3的不同体积比（v / v）的NaOH的胶凝溶液合成。在随后的吸附研究中，选择具有对应于NaOH-Na 2 CO 3的体积比对应于NaOH-Na 2 CO 3的体积比的最佳吸附容量的新形成的GCS凝胶珠。采用Taguchi正交阵列L9（3（3））探讨三种控制因子的同时变化，即：Mo（pH 3,7,11）的pH，Mo的初始浓度（30ppm，50ppm，90 ppm ）和新的GCS吸附剂剂量（0.35g，0.5g，1g）。发现染料除去百分比（除去％）在（30.09 +/- 4.66）％之间，（98.15 +/- 0.23）％。通过GCS吸附剂的Mo的平均摄取容量（Q（e））从（1.22 +/- 0.03）Mg / g至（9.14 +/- 0.00）mg / g不同。选择S / N比的最高平均值以获得最大的吸附性能。最高除去％的最佳操作条件在pH 3中达到，其中1g吸附剂剂量和30ppm浓度，而最大Q（E）在pH 3时用吸附剂量为0.35g和90ppm的Mo专注。使用现场发射扫描电子显微镜（FESEM）分析了GCS凝胶珠粒前后的形态。吸附结果最适合两个参数哈尔辛 - 汝拉等温线（R-2 = 0.9979）。这确实确认GCS凝胶珠子的MO染料溶液的吸附是多层吸附。

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