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Extraction of complex (∝ 1 P 2 W 17 O 61 Fe) 7- by liquid surfactant membrane The extraction of a Dawson-type heteropolyanion (∝ 1 P 2 W 17 O 61 Fe) 7- was carried out by liquid surfactant membrane using (SPAN80) as surfactantand (TIBA) as extractant, internal phase used (NH4)2CO3. The extraction efficiency is 90 %. Then in order to regenerate the membrane, the stripping efficiency was given according to the concentration of the internal phase, the stripping efficiency is 76 % was obtained for (NH4)2CO3 concentration 1 M.

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Extraction du complexe (&amp;#87331P&lt;sub&gt;2&lt;/sub&gt;W&lt;sub&gt;17&lt;/sub&gt;O&lt;sub&gt;61&lt;/sub&gt;Fe)7-, par membrane liquide emulsionnee