Poly(N-vinylpyrrolidone) as metal ion liquid-liquid extractant

Poly(N-vinylpyrrolidone) (PVP) was investigated as a novel extracting agent . The metal ion extraction properties for Cu(II), Co(II), Ni(II), Cd(II), Z n(II), Pb(II), Hg(II), Cr(III) and Fe(III) were investigated using the liqu id-liquid solvent extraction technique (bath method). The metal ion interac tions with the polymer were determined as a function of the pH as well as t he kinetic characteristic and stripping. For copper ions pH 4 was the optimum extracting pH value, and the 2M hydroc hloride acid was better than nitric acid as a stripping agent.