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Rhodamine B removal from aqueous solution by CT269DR resin: Static and dynamic study
Adsorption Science & Technology ( IF 2.9 ) Pub Date : 2019-11-19 , DOI: 10.1177/0263617419887238
Jinbei Yang 1 , Shuyue Yu 1 , Wentao Chen 1 , Yibing Chen 1
Affiliation  

The adsorption of Rhodamine B onto CT269DR resin has been studied through static and dynamic experiments. The effects of shaking speed, resin dosage, and pH on adsorption were investigated by static experiments. The external mass transfer rate remains substantially unchanged when the shaking speed exceeds 160 r min−1. The optimal pH range is 5–8, and an increase of resin dosage can directly improve the percentage of removal of Rhodamine B. The equilibrium isotherm data of Rhodamine B on CT269DR resin fit the Langmuir adsorption isotherm well. The thermodynamics parameters, ΔH = 69.93 kJ mol−1, ΔS = 326.73 J mol−1 K−1, and ΔG < 0, demonstrate that the adsorption of Rhodamine B onto CT269DR resin is spontaneous and endothermic. The pseudo first-order kinetic model can be successfully used to represent the adsorption process and the activation energy is 25.7 kJ mol−1. The dynamic experiments show that the breakthrough point is advanced when the flow rate increases and the bed adsorption capacity increases with increasing temperature. Furthermore, the desorption using the solution of 2% NaOH is suitable for desorption and reusing process, and scanning electron microscope (SEM) and fourier transform infrared spectroscopy (FT-IR) analysis reveals that used resin has good wear resistance and chemical stability. The results confirm that CT269DR resin can be employed as an efficient adsorbent for the removal of Rhodamine B from wastewater.

中文翻译:

CT269DR树脂从水溶液中去除罗丹明B:静态和动态研究

通过静态和动态实验研究了罗丹明 B 在 CT269DR 树脂上的吸附。通过静态实验研究了振荡速度、树脂用量和pH值对吸附的影响。当振动速度超过 160 r min-1 时,外部传质速率基本保持不变。最佳pH范围为5-8,增加树脂用量可直接提高罗丹明B的去除率。CT269DR树脂上罗丹明B的平衡等温线数据与Langmuir吸附等温线拟合良好。热力学参数 ΔH = 69.93 kJ mol-1、ΔS = 326.73 J mol-1 K-1 和 ΔG < 0,表明若丹明 B 在 CT269DR 树脂上的吸附是自发和吸热的。拟一级动力学模型可以成功地用于表示吸附过程,活化能为25.7 kJ mol-1。动态实验表明,随着流速的增加,临界点提前,床层吸附容量随着温度的升高而增加。此外,使用2% NaOH溶液解吸适合解吸和重复使用过程,扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)分析表明,使用过的树脂具有良好的耐磨性和化学稳定性。结果证实,CT269DR 树脂可用作去除废水中罗丹明 B 的有效吸附剂。动态实验表明,随着流速的增加,临界点提前,床层吸附容量随着温度的升高而增加。此外,使用2% NaOH溶液解吸适合解吸和重复使用过程,扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)分析表明,使用过的树脂具有良好的耐磨性和化学稳定性。结果证实,CT269DR 树脂可用作去除废水中罗丹明 B 的有效吸附剂。动态实验表明,随着流速的增加,临界点提前,床层吸附容量随着温度的升高而增加。此外,使用2% NaOH溶液解吸适合解吸和重复使用过程,扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)分析表明,使用过的树脂具有良好的耐磨性和化学稳定性。结果证实,CT269DR 树脂可用作去除废水中罗丹明 B 的有效吸附剂。扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)分析表明,所用树脂具有良好的耐磨性和化学稳定性。结果证实,CT269DR 树脂可用作去除废水中罗丹明 B 的有效吸附剂。扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)分析表明,所用树脂具有良好的耐磨性和化学稳定性。结果证实,CT269DR 树脂可用作去除废水中罗丹明 B 的有效吸附剂。
更新日期:2019-11-19
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