Abstract The performance of crab shell chitosan (600 µm) as prospective adsorbent for phenol removal was studied in dynamics mode. The chitosan adsorbent had specific surface area of 191 m2/g and showed the surface characteristics linked to amine/amide groups. The effects of operating conditions on phenol adsorption at different concentrations (100 and 200 mg/L), flow rates (2.17 and 2.90 mL/min) and bed heights (1.75 and 3.5 cm) were evaluated. Results showed that the maximum phenol adsorption capacity by the crab shell chitosan was recorded at 190 mg/g. Thomas, Yoon–Nelson and Adam–Bohart models displayed good correlation with experimental data, hence best described the dynamics breakthrough of phenol removal. External and internal diffusion were the rate controlling mechanism, while the entire system was predominated by a simultaneous steady state process of intraparticle diffusion and ionic interactions. The crab shell chitosan shows a promising potential as adsorbent for wastewater treatment.

中文翻译：

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蟹壳壳聚糖对苯酚的吸附动力学

摘要 在动力学模式下研究了蟹壳壳聚糖 (600 µm) 作为去除苯酚的预期吸附剂的性能。壳聚糖吸附剂的比表面积为 191 平方米/克，并显示出与胺/酰胺基团相关的表面特征。评估了操作条件对不同浓度（100 和 200 毫克/升）、流速（2.17 和 2.90 毫升/分钟）和床高（1.75 和 3.5 厘米）下苯酚吸附的影响。结果表明，蟹壳壳聚糖对苯酚的最大吸附量为 190 mg/g。Thomas、Yoon-Nelson 和 Adam-Bohart 模型与实验数据显示出良好的相关性，因此最好地描述了苯酚去除的动力学突破。外部和内部扩散是速率控制机制，而整个系统主要由粒子内扩散和离子相互作用的同步稳态过程主导。蟹壳壳聚糖显示出作为废水处理吸附剂的潜力。