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Effect of particle size on removal of sunset yellow from aqueous solution by chitosan modified diatomite in a fixed bed column

机译：粒径对壳聚糖修饰硅藻土从水溶液中去除日落黄色的效果

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This study investigated how the particle size of the modified adsorbent diatomite earth & chitosan (DE&C) affects the removal of sunset yellow (SY) from water using a fixed bed column. Fourier Transform Infrared Spectroscopy (FTIR) analysis indicated that the amino group (-NH2) played an important role during the adsorption of SY. The calculated surface area of the DE&C absorbent was found to be 69.68 m(2) g(-1) and SEM images showed that DE&C is a superior porous adsorbent. Four dimensions of DE&C were measured in a fixed bed column. The breakthrough time of SY increased as the size of DE&C decreased and the effluent concentration showed a trend of first increasing and then decreasing. It was also found that the nature of the variation in the effluent concentration with time was parabolic and that the adsorption data fitted the parabolic equation at C-t/C-0 = 0-0.1. Due to the different combination ability with hydrogen bonding, the phenomenon of parabolic variation is quite disparate from other adsorbents. But, compared with the breakthrough time, the saturation time was close to other particle sizes, except for 2.86-3.35 mm in size. pH is an important parameter for the adsorption of SY and the main mechanism is adsorption with each other between positive and negative charges. The Thomas model shows lower correlation with the smaller sizes and R-2 with an average of 0.9413. The Thomas model indicated that the maximum value of q(0) was 97.06 mg g(-1) and with an increase in the initial SY concentration, the bed height and the values of q(0) decreased as k(t) increased. The Yoon-Nelson model describing the theoretical required time was close to the experimental values and k(YN) increased as C-0 increased.
机译：本研究研究了改性吸附剂硅藻土地球和壳聚糖（DE＆C）的粒径如何影响使用固定床柱从水中移除夕阳黄色（SY）。傅里叶变换红外光谱（FTIR）分析表明，氨基（-NH2）在SY的吸附过程中发挥了重要作用。发现DE＆C吸收剂的所计算的表面积为69.68m（2）g（-1），SEM图像显示DE＆C是优异的多孔吸附剂。在固定床柱中测量DE＆C的四个尺寸。随着DE＆C的尺寸减少而随着第一次增加，流出浓度的趋势和随后的趋势增加了SY增加的突破时间。还发现，流出物浓度随时间的变化的性质是抛物线，并且吸附数据在C-T / C-0 = 0-0.1处拟合抛物线方程。由于具有氢键的不同组合能力，抛物线变异的现象与其他吸附剂相当不同。但是，与突破时间相比，饱和时间接近其他粒径，除了2.86-3.35mm的尺寸。 pH是用于SY的吸附的重要参数，主要机制在正极和负电荷之间彼此吸附。托马斯模型表现出与较小尺寸和R-2的相关性，平均为0.9413。托马斯模型表明，Q（0）的最大值为97.06mg g（-1），并且随着k（t）的增加而增加，床高度和Q（0）的值降低。描述理论所需时间的Yoon-Nelson模型接近实验值，随着C-0增加而增加的K（YN）。

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  • 来源
    《RSC Advances》 |2015年第104期|共9页
  • 作者

    Zhang Yanzhuo; Li Jun; Li Wenjing;

  • 作者单位

    Beijing Univ Technol Coll Architecture &

    Civil Engn Key Lab Beijing Water Qual Sci &

    Water Environm R Beijing 100124 Peoples R China;

    Beijing Univ Technol Coll Architecture &

    Civil Engn Key Lab Beijing Water Qual Sci &

    Water Environm R Beijing 100124 Peoples R China;

    Beijing Univ Technol Coll Architecture &

    Civil Engn Key Lab Beijing Water Qual Sci &

    Water Environm R Beijing 100124 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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