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

Autor: Abdelhamid AE; Polymers & Pigments Department, National Research Centre, 33-El-Buhouth St., Dokki, Cairo, 12622, Egypt., Salem HM; Nuclear Materials Authority, El Maadi, P.O.Box 530, Cairo, Egypt., Ismaeil DA; Nuclear Materials Authority, El Maadi, P.O.Box 530, Cairo, Egypt., Orabi AH; Nuclear Materials Authority, El Maadi, P.O.Box 530, Cairo, Egypt. drahmedorabi@nma.org.eg.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2024 Oct 02; Vol. 196 (11), pp. 1004. Date of Electronic Publication: 2024 Oct 02.
DOI: 10.1007/s10661-024-13142-8
Abstrakt: 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.
(© 2024. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
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