Synthesis of ion exchange film based on chemical grafting of styrene onto polyethylene/EPDM rubber blend for thorium removal.

IF 2.9 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Environmental Monitoring and Assessment Pub Date : 2024-10-02 DOI:10.1007/s10661-024-13142-8

Ahmed E Abdelhamid, Hend M Salem, Doaa A Ismaeil, Ahmed H Orabi

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Abstract

Chemical grafting of low-density polyethylene film blended with ethylene propylene diene monomer rubber (PE/EPDM) using styrene monomer followed by a sulfonation process was investigated. Different factors affecting the grafting process, such as monomer and initiator concentrations, time of reaction, and grafting temperature, were studied. Sulfonation of the grafted films was carried out using chlorosulfonic acid in dichloromethane. Characterization of the grafted and sulfonated films was performed using ATR-FTIR, SEM, TGA, and XRD instruments. The grafting was successfully performed in aqueous media using sodium bisulfite as initiator, reaching a grafting yield of 130% and an ion exchange capacity of 1.2 m_eq/g. The removal of thorium ions from aqueous solution was studied using the obtained ion exchange films. The results showed that the maximum adsorption capacity of Th(IV) was 177.5 mg. g^-1 (pH = 3, 298 K and 60 min). Removal isotherm and Kinetics were investigated, and the results revealed that the adsorption process was chemisorption homogeneous monolayer adsorption, exothermic, and spontaneous.

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基于苯乙烯化学接枝到聚乙烯/EPDM 橡胶混合物上的离子交换膜的合成，用于除钍。

研究了低密度聚乙烯薄膜与乙烯-丙烯-二烯单体橡胶（PE/EPDM）的化学接枝，使用苯乙烯单体，然后采用磺化工艺。研究了影响接枝过程的不同因素，如单体和引发剂浓度、反应时间和接枝温度。接枝薄膜的磺化是在二氯甲烷中使用氯磺酸进行的。使用 ATR-FTIR、SEM、TGA 和 XRD 仪器对接枝和磺化薄膜进行了表征。以亚硫酸氢钠为引发剂，在水介质中成功进行了接枝，接枝率达到 130%，离子交换容量为 1.2 meq/g。研究人员利用获得的离子交换薄膜从水溶液中去除钍离子。结果表明，Th(IV) 的最大吸附容量为 177.5 毫克/克-1（pH = 3、298 K 和 60 分钟）。研究了吸附等温线和动力学，结果表明吸附过程为化学吸附均相单层吸附、放热和自发吸附。

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来源期刊

Environmental Monitoring and Assessment 环境科学-环境科学

CiteScore

4.70

自引率

6.70%

发文量

1000

审稿时长

7.3 months

期刊介绍： Environmental Monitoring and Assessment emphasizes technical developments and data arising from environmental monitoring and assessment, the use of scientific principles in the design of monitoring systems at the local, regional and global scales, and the use of monitoring data in assessing the consequences of natural resource management actions and pollution risks to man and the environment.