吸附
普鲁士蓝
朗缪尔吸附模型
丙烯酸
表面改性
聚合
水溶液
核化学
铯
材料科学
化学工程
聚丙烯
化学
无机化学
有机化学
复合材料
聚合物
电极
物理化学
工程类
单体
电化学
作者
Narges Dehbashi Nia,Seung‐Woo Lee,Sungjun Bae,Tae-Hyun Kim,Yuhoon Hwang
标识
DOI:10.1016/j.apsusc.2022.153101
摘要
• PP filter was successfully activated by combination of O 2 plasma and acrylic acid. • Mechanical properties of PP were enhanced without morphological changes. • Contents of Prussian blue was dramatically increased by surface modification. • PP-O 2 /AA+PB shows high Cs adsorption capacity with long-term performance. Radioactive cesium is commonly emitted during nuclear accidents and Prussian blue (PB) is an effective adsorbent with superior selectivity toward cesium. This study describes the surface modification of a polypropylene non-woven filter (PP) as the supporting material for PB immobilization, which included O 2 plasma treatment and acrylic acid (AA) modification. AA was successfully polymerized using O 2 plasma to provide a reaction site for the polymerization. The carboxylic acid groups introduced by the polymerization of AA induced a higher amount of PB immobilization on the surface. The cesium adsorption performance of the prepared adsorbent filter was evaluated via adsorption kinetics and isotherm analyses. The maximum adsorption capacity was calculated as 51.9 mg/g according to the Langmuir isotherm. To confirm its long-term practical applicability, the adsorbent filter was incorporated into a flow-through water treatment system that was operated for three months. The tested five-layer filter achieved a 100% cesium removal efficiency (initial concentration 40 μg/L) during the first 12 days, after which a 50% removal efficiency was maintained for 24 days. Therefore, the surface modification methodology proposed herein provides a promising means to convert commercial filter materials into advanced water treatment filters for the removal of radioactive cesium from contaminated water.
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