without changing your settings we'll assume you are happy to receive all RSC cookies.
You can change your cookie settings by navigating to our Privacy and Cookies page and following the instructions. These instructions
are also obtainable from the privacy link at the bottom of any RSC page.
Tin(II) hexacyanoferrate(III) gel, prepared by adding tin(II) chloride to potassium hexacyanoferrate(III) solution and heating at 80 °C, has been found to be stable in acids and salt solutions. Distribution coefficients, determined for various metal ions, show that the exchanger has a high affinity for lead. Binary separations of lead from a number of other metal ions at different concentrations were achieved on the column of the exchanger and a ternary separation of Pb2+- Cu2+- Zn2+ was also carried out.
The preparation of the cited gel is described; the product is stable in aq. mineral acid or salt (e.g., KCl or NH4NO3) media. Distribution coeff. have been determined for 31 elements by shaking 0.1 g of exchanger with 10 ml of metal ion soln. (2mM) for 48 h. There was high affinity for univalent cations (Rb+, Cs+ and Ag+), but only for Pb2+ amongst bivalent cations. Up to 1mM-Pb2+ was completely adsorbed from soln. in static studies. Dynamic separations of Pb2+ from a variety of binary mixtures were achieved; the adsorbed Pb2+ were eluted with 1M-HNO3. Lead could be separated from Cu and Zn, but not from Ag.
Fetching data from CrossRef. This may take some time to load.