Andrew Lin Kun-Yi, Wu Chang-Husan
Water Environ Res. 2017 Jun 9. doi: 10.2175/106143017X14902968254692.
Adsorbents reported to remove a toxic acidic azo dye, Amaranth (AMR) are very limited, and their typical adsorption capacities are quite low. Recently, a zeolitic imidazolate framework (ZIF-67) has been proposed as a novel adsorbent as ZIF-67 possesses high surface area, superior chemical stability in water and positive charges, making it a promising adsorbent for AMR. Nevertheless, no studies have been conducted to investigate the adsorption of AMR to ZIF-67. Herein, ZIF-67 is employed for the first time to remove AMR from water via adsorption. Adsorption behaviors are investigated via determining the adsorption kinetics and isotherm. ZIF-67 also exhibits a significant higher maximum adsorption capacity (qmax = 121 mg g-1 at 30 °C) than most of the reported adsorbents. ZIF-67 can be also regenerated by washing it with NaCl solutions and the regeneration efficiency remains effective over multiple cycles, demonstrating that ZIF-67 is a promising adsorbent for AMR.
据报道，能够去除有毒酸性偶氮染料苋菜红（AMR）的吸附剂非常有限，而且它们的典型吸附容量相当低。最近，一种沸石咪唑酯骨架材料（ZIF-67）被提议作为一种新型吸附剂，因为ZIF-67具有高比表面积、在水中具有优异的化学稳定性以及正电荷，使其成为一种有前景的用于吸附AMR的吸附剂。然而，尚未开展研究来探究AMR对ZIF-67的吸附情况。在此，首次使用ZIF-67通过吸附作用从水中去除AMR。通过测定吸附动力学和等温线来研究吸附行为。ZIF-67还表现出比大多数已报道的吸附剂显著更高的最大吸附容量（30℃时qmax = 121 mg g-1）。ZIF-67也可以通过用NaCl溶液洗涤进行再生，并且在多个循环中再生效率仍然有效，这表明ZIF-67是一种有前景的用于吸附AMR的吸附剂。
