Improving the Properties of Waste Polystyrene Foam via Heterogeneous Sulfonation: A Sustainable Method for Oil/Water Separation Applications. Journal of Pure & Applied Sciences , [S. l.], v. 24, n. 3, p. 195–199, 2025. DOI: 10.51984/jopas.v24i3.3886. Disponível em: https://www.sebhau.edu.ly/journal/jopas/article/view/3886. Acesso em: 30 jan. 2026.