Sorption-photometric determination of the sum of some heavy metals in natural water

摘要

Sorption of Cu, Zn, Cd, and Pb on polyuretane foam (PUF) modified by thiosemicarbazone of 1,2-naphotoquinone has been studied. Optimal conditions of sorption are pH 5-7, 1 hour, temperature-40-45℃. On basis of isotherma of sorption composition of thiosemicarbazonates formed on PUF surface has been determined M:R=1:2. Sorption-fotometric method for determination of summer Cu, Zn, Pb, Cd, Mn and Ni has been proposed. Working range of metal concentrations makes up 0.1-20 M equiv/l at iron (III) concentration not more than 2 mg/l.