MECHANISM OF LANTANUM METAL TRANSPORT IN MEMBRAN LIQUID WITH CARRIER SENYA WA MACROSIKLIS

Abstract

The transport mechanism of lanthanum element in the supported liquidmembrane with macrocycle compound Di benzo IB crowns 6 carriers was studied.  These transport are two kinds. that is  chemical transport and potential   transport.   The  chemical  transport  is   done  with  two  cell compartment   (feed   compartment   and   stripping   compartment).  and separate with membrane that prepare with DiBenzoIBCrown6. Poly Vinyl Chloride. Di  Octyl Ptalate, Sodium  tetra butyl borate  in  Tetra hydro furan solution. A 150 mL solution of La3+   JO-3  Min feed  cell stirrer with300 rpm speed along 3 hour. The stripping phase is solution that varied the pH from  1 to B. The same way. then solution in the feed cell is varied from  10-1  M to 5.10-4  M. The potential  transport is measured with the relative  same  cell.  The potential   transport  measure  with  two  kind reference electrode. Ag/AgCI reference  electrode in the inner cell and calomel reference electrode in the outer cell. Inner cell is contain mixture solution KCL 10-3 M and La3+    IO-3 M and outer cell is contain solution La3"   that variedfrom  10-8 to JO-J  M. The chemical transport is effective at low pH  (below pH  4) and high pH  (upper pH  6). It is good way for separation of La3'.     The transport ion La3+    is low at pH 4 -  6. It is good areafor applied as sensor membrane electrode that has minimal diffusion potential.  The system has good  correlation in potential  membrane that gives slope value 19.36 as Nernst coefficient.