Civil and Environmental Engineering, Rice University, Houston, TX, 77005, United States.
Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Republic of Korea.
J Hazard Mater. 2017 Mar 5;325:223-229. doi: 10.1016/j.jhazmat.2016.12.003. Epub 2016 Dec 5.
This study investigates As(V) removal from aqueous solutions using a novel amine-doped acrylic ion exchange fiber. The amine doping reaction was confirmed using FT-IR, and the surface of the fiber was characterized using FEG-SEM. The synthesis process was completed within 60min using an AlCl·6HO catalyst at 100°C, and the resulting in a fiber with an ion exchange capacity of 7.5meq/g. The removal efficiency of the A-60 fiber was affected by the solution pH, and the efficiency was optimum at pH 3.04. As(V) adsorption on the fiber was rapid in the first 20min and reached equilibrium in 60min. As(V) removal followed pseudo-first-order kinetics, and the Redlich-Peterson adsorption isotherm model provided the best fit of the equilibrium data. The fiber has an As(V) adsorption capacity (q) of 205.32±3.57mg/g, which is considerably higher than literature values and commercial adsorbents. The removal efficiency of the fiber was above 83% of the initial value after nine regeneration cycles.
本研究采用新型胺掺杂丙烯酸离子交换纤维去除水溶液中的 As(V)。通过傅里叶变换红外光谱（FT-IR）确认了胺掺杂反应，通过场发射扫描电子显微镜（FEG-SEM）对纤维表面进行了表征。在 100°C 下使用 AlCl·6HO 催化剂，60min 内完成了合成过程，得到了一种离子交换容量为 7.5meq/g 的纤维。A-60 纤维的去除效率受溶液 pH 的影响，在 pH 3.04 时效率最佳。As(V)在纤维上的吸附在前 20min 内迅速进行，60min 时达到平衡。As(V)的去除遵循拟一级动力学，Redlich-Peterson 吸附等温线模型对平衡数据拟合效果最佳。纤维对 As(V)的吸附容量（q）为 205.32±3.57mg/g，明显高于文献值和商业吸附剂。纤维经过九次再生循环后，去除效率仍保持在初始值的 83%以上。
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