Transport of Zn(II), Cd(II), and Pb(II) across CTA plasticized membranes containing organophosphorous acids as an ion carriers

Preconcentration and separation of copper, nickel and zinc in aqueous samples by flame atomic absorption spectrometry after column solid-phase extraction onto MWCNTs impregnated with D2EHPA-TOPO mixture

“…Heavy metals are major pollutants in marine, ground and industrial wastewater [1]. Heavy metals like mercury, lead, cadmium, nickel, chromium, copper and zinc are toxic even in extremely minute quantities present in air, water and food [2].…”

Cadmium (II) and lead (II) transport in a polymer inclusion membrane using tributyl phosphate as mobile carrier and CuFeO2 as a polarized photo electrode

“…These authors suggest that only high polarity plasticizers can be applied preferentially as solvent in PIM. More relevant papers published by the same research groups which specifically concern the separation of cadmium and lead using D2EHPA and Cyanex commercial extractants have found that the competitive transport led to a preferential selectivity for lead compared to cadmium [43]. Table 3 represents the variation of the concentrations of Pb 2+ and Cd 2+ in the strip phase versus the initial concentration of ions.…”

PNP-16-crown-6 derivatives as ion carriers for Zn(II), Cd(II) and Pb(II) transport across polymer inclusion membranes

“…Transport experiments were carried out in a permeation module cell described in our earlier paper [21]. The volumes of aqueous source and receiving phases were equal to 50 and 5000 ml, respectively.…”