JOURNAL of the Tunisian Chemical Society

serving the Research, the Education and the Industry

Recovered poly(vinyl chloride) grafted by amino groups and evaluation in metal ions extraction

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The amount of plastic materials used is rapidly increasing and so are the problems caused by municipal plastic waste. Therefore this kind of waste requires an effective control to prevent its negative economic and environmental impact. For this reason the recycling process, chemical processing operations or purification of plastic waste have become an essential process for depollution nowadays. This work studies the purification of recovered Poly(vinyl chloride) (PVC) and its functionalization by grafting amino groups. The purified polymer was substituted with p-phenylenediamine and with p-methoxyaniline to obtain polymers (P1) and (P2). In another modification, diethylenetriamine was introduced on the modified PVC skeleton, obtaining polymers (P3) from (P1) and (P4) from (P2). The obtained polymers were characterized by elemental analysis (CHN), infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC). After these chemical modifications, the modified polymers were tested for metal cation extraction from the aqueous phase containing (Cr(III), Pb(II), Cd(II), Zn(II) or Co(II)) using the solid-phase extraction (SPE) method. The study of these extractions with modified PVC (P1, P2, P3 and P4) was followed by Atomic Absorption measurements in aqueous solutions. The extraction percentage of Cd(II) was 84.8% by P3, 79.4% by P4, 18.7% by P2, and 25.8% by P1.

F. Mbarki, F. Ammari, K. Ben Abdessalem, F. Meganem

PVC grafting, p-phenylenediamine, p-methoxyaniline, diethylenetriamine, metal extraction

Pages 169-177

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