• Resources Recycling
• /
• v.10 no.2
• /
• pp.13-19
• /
• 2001

Several hydrolyzed extruded PAN's were prepared through reaction of extruded PAN (7.5% methyl acrylate) with NaOH in methanol at various temperatures and times. These were amidoximated with hydroxylamine in MeOH and/or $H_2$O to introduce an excellent adsorption capacity of heavy metal ions. Amidoximated hydrolyzed extruded fAN showed superior swellability to non-hydrolyzed extruded PAM. The amidoximated extruded PAN hydrolyzed for 6h at $60^{\circ}C$ showed the best dimensional stability. Amidoximated hydrolyzed extruded PAN has more adsorption capacity of $Cu^{2+}$ than that of $Ni^{ 2+}$ These PAN derivates also showed an excellent selectivity for adsorption of metal ions.

• Membrane Journal
• /
• v.32 no.1
• /
• pp.13-22
• /
• 2022

Ever increasing global energy demand gives rise to uncontrollable environmental pollution. Demand on fossil fuel and consequent carbon emission leads to global warming and climate change. Nuclear energy is an alternative source to generate clean energy but mining of nuclear fuel is associated with harmful chemicals. Mining of valuable minerals from sea water by membrane separation process is a cost effective along with environmental friendly process. Separation and adsorption based mining of valuable minerals from sea water are another efficient process. Recovery of actinides from rare earth elements are very challenging and expensive process. Pressure driven membrane separation process is economically more viable along with environmental process. In this review membrane separation process are based on polyether sulfone, polyamide, polyimide, polyamidoxine and hybrid membranes. In case of adsorption process, mainly amidoxime kind of adsorbent are discussed.