Park Jung Eun, Shin Jun-Ho, Oh Wonzin, Choi Sang-June, Kim Jeongju, Kim Chorong, Jeon Jongho
Department of Applied Chemistry, College of Engineering, Kyungpook National University, Daegu 41566, Korea.
School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University, Daegu 41566, Korea.
Toxics. 2022 Feb 19;10(2):98. doi: 10.3390/toxics10020098.
Chromium is a toxic and carcinogenic heavy metal that originates from various human activities. Therefore, the effective removal of chromium from aqueous solutions is an extremely important global challenge. Herein, we report a chitosan-coated iron oxide nanoparticle immobilized hydrophilic poly(vinylidene) fluoride membrane (Chi@FeO-PVDF) which can potentially be used for efficient removal of hexavalent chromium(VI) by a simple filtration process. Membrane filtration is an easy and efficient method for treating large volumes of water in a short duration. The adsorption experiments were conducted by batch and continuous in-flow systems. The experimental data showed rapid capture of hexavalent chromium (Cr(VI)) which can be explained by the pseudo-second-order kinetic and Langmuir isotherm model. The nanocomposite membrane exhibited high adsorption capacity for Cr(VI) (14.451 mg/g in batch system, 14.104 mg/g in continuous in-flow system). Moreover, its removal efficiency was not changed significantly in the presence of several competing ions, i.e., Cl, NO, SO, and PO. Consequently, the Chi@FeO-PVDF-based filtration process is expected to show a promising direction and be developed as a practical method for wastewater treatment.
铬是一种有毒且致癌的重金属，源于各种人类活动。因此，从水溶液中有效去除铬是一项极其重要的全球性挑战。在此，我们报道了一种壳聚糖包覆的氧化铁纳米颗粒固定化亲水性聚偏氟乙烯膜（Chi@FeO-PVDF），它有可能通过简单的过滤过程用于高效去除六价铬（Cr(VI)）。膜过滤是一种在短时间内处理大量水的简便且高效的方法。吸附实验通过分批和连续流入系统进行。实验数据表明六价铬（Cr(VI)）能被快速捕获，这可以用准二级动力学和朗缪尔等温线模型来解释。该纳米复合膜对Cr(VI)表现出高吸附容量（分批系统中为14.451 mg/g，连续流入系统中为14.104 mg/g）。此外，在存在几种竞争离子（即Cl、NO、SO和PO）的情况下，其去除效率没有显著变化。因此，基于Chi@FeO-PVDF的过滤过程有望展现出一个有前景的方向，并发展成为一种实用的废水处理方法。
