Hubei Key Laboratory of Coal Conversion and New Carbon Material, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
Hubei Key Laboratory of Coal Conversion and New Carbon Material, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
Carbohydr Polym. 2022 Jan 15;276:118729. doi: 10.1016/j.carbpol.2021.118729. Epub 2021 Oct 6.
The efficient and recyclable magnetic chitosan microspheres (MCMs) were successfully synthesized to remove iodide from nuclear wastewater and characterized through XRD, FTIR, SEM, EDS, VSM, TGA and XPS. The characterization results indicated that the MCMs exhibited smooth spherical morphology and good magnetic properties. The removal potential of MCMs was investigated for iodide (I) anions at different conditions. From pH 3 to pH 9, MCMs performed the high I removal efficiency (>90%). The maximum I removal capacity of MCMs was up to 0.8087 mmol g at 298 K, well-fitting with the pseudo-second-order and Sips models. Furthermore, the I removal efficiency of MCMs still maintained more than 91% after five adsorption-desorption cycles, performing good regeneration and reusability. This study is expected to prompt the MCMs to become an efficient and recyclable biosorbent for iodide removal from nuclear wastewater.
高效且可回收的磁性壳聚糖微球（MCMs）被成功合成，用于从核废水中去除碘化物，并通过 XRD、FTIR、SEM、EDS、VSM、TGA 和 XPS 进行了表征。表征结果表明，MCMs 呈现出光滑的球形形态和良好的磁性能。在不同条件下研究了 MCMs 对碘化物（I）阴离子的去除潜力。在 pH 3 到 pH 9 的范围内，MCMs 表现出高的 I 去除效率（>90%）。在 298 K 时，MCMs 的最大 I 去除容量高达 0.8087 mmol g，与准二级和 Sips 模型拟合良好。此外，MCMs 在经过五次吸附-解吸循环后，I 去除效率仍保持在 91%以上，表现出良好的再生和可重复使用性。本研究有望促使 MCMs 成为一种从核废水中去除碘化物的高效且可回收的生物吸附剂。
