Preparation, characterisation and sorptive properties of polymer based phosphorus-containing carbon

• Published in: Reactive & functional polymers 1999-07, Vol.41 (1), p.245-253
• Main Authors: Strelko Jr, V, Streat, M, Kozynchenko, O
• Format: Article
• Language: English
• Subjects: Applied sciences; Batch experiments; Chemical modifications; Chemical reactions and properties; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Kinetics; Lead sorption; Mini-columns; Organic polymers; Phosphorus-containing carbons; Physicochemistry of polymers; Porous materials; Selectivity; Sorbent regeneration; Sorption isotherms
• ISSN: 1381-5148
• DOI: 10.1016/S1381-5148(99)00061-9

A novel phosphorus-containing carbonaceous sorbent has been prepared by pyrolysis of phosphorylated phenol-formaldehyde resin. The surface properties of the material have been characterised by nitrogen adsorption–desorption isotherms and MAS NMR-P 31 spectrometry. The ion-exchange properties of the carbon were assessed by pH-titration and electrophoretic mobility measurements. Sorption studies were performed in batch and mini-column experiments and indicated high affinity towards lead(II) over copper(II), nickel(II) and cadmium(II) for solutions containing these metals (in the mg/l and μg/l range) although the rate of sorption was relatively slow. The sorption affinity series for metal ions studied coincides with the solubility products of the corresponding metal phosphates and stability constants of pyrophosphate complexes in aqueous solutions. Elution using conventional mineral acids yields good heavy metal recovery and effective adsorbent regeneration.