Investigation of the Segregation of Radiocesium from Contaminated Aqueous Waste Using AMP-PAN Extraction Chromatography

吸附 弗伦德利希方程 化学 水溶液 萃取(化学) 离子交换 离子交换树脂 朗缪尔 吸附 色谱法 洗脱 朗缪尔吸附模型 聚丙烯腈 核化学 无机化学 离子 有机化学 聚合物
作者
Taisir K. Abbas,Thaeerh Tariq Abdulghafoor,Ali Hassan Aziz,Saad Al-Saadi,Takrid M. Nafae,Khalid Rashid,Qusay F. Alsalhy
出处
期刊:Energies [Multidisciplinary Digital Publishing Institute]
卷期号:16 (18): 6544-6544 被引量:3
标识
DOI:10.3390/en16186544
摘要

Removing the hazardous and unstable radioactive isotopes has been considered an arduous task, though they are in minimal concentrations. Cesium-137 (137Cs+) is a primary fission product produced by nuclear processes. Even at low concentrations, such radioactive material is a menacing source of contaminants for the environment. The current study aims to separate 137Cs+ from a real contaminated aqueous solution via an ion exchange mechanism using ammonium molybdophosphate–polyacrylonitrile (AMP-PAN) resin loaded in an extraction chromatographic column that possesses considerable selectivity toward cesium ion (Cs+) due to the specific ion exchange between 137Cs+ and NH4+. Additionally, the proposed interaction mechanism between 137Cs+ with APM-PAN resin has been illustrated in this study. The results disclosed that the optimum efficient removal of 137Cs+ (91.188%) was obtained by the AMP-PAN resin using 2 g·L−1, while the distribution adsorption coefficient (129.359 mL·g−1) was at pH 6. The isothermal adsorption process was testified through the Langmuir and Freundlich models. The estimated maximum adsorption capacity reached 140.81 ± 21.3 mg·g−1 for the Freundlich isotherm adsorption model. Finally, AMP-PAN resin could eliminate 137Cs+ from water effectively through adsorption.
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