ISSN:
1022-1352
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Bioanalogous organic polyphosphates (PP) and polymer ion-exchange membranes (IEM) were used to arrange a membrane system for the transportation of Zn(II), Mn(II), Cu(II), Co(II) and Ni(II) ions. The system consists of three membranes separating a feed and a strip solution with metal sulfates and sulfuric acid, respectively: \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm MSO}_4 \left| {{\rm IEM}} \right|{\rm Liquid\; membrane \;with \;PP}\left| {{\rm IEM}} \right|{\rm H}_{\rm 2} {\rm SO}_{\rm 4} $\end{document} Poly(trimethylene phosphate), α-hydroxy-ω-(2-ethylhexyl)poly(trimethylene phosphate), poly(1,2-glycerol phosphate) and poly(2,3-acetoxyglycerol phosphate) were used as ionic carriers for mimicking some transport functions of natural teichoic acids. These polyelectrolytes were found to facilitate the exchange-diffusion process of heavy metal ions and to exhibit fluxes in the range 3,5 · 10-9 - 6 · 10-9 mol M(II)/(cm2 · s). The specific stationary fluxes typically change in the order JCu 〉 JCo 〉 JNi 〉 JMn 〉 JZn. The observed transport preference is consistent with the affinity order of teichoic acids or the bacteria cell wall toward Cu(II), Mn(II) and Zn(II).
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1997.021980610
Permalink