02. Sepration_2y_2016_03_09.pdf

02. Sepration_2y_2016_03_09.pdf

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Extraction Efficiency v Vo org m Vw aq Vo org m1 m-m1 Vw aq When Vo = Vw
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Multiple extraction v Vo org m Vw aq Vo org m-m1 m1 Vw aq After 1 st extraction For 2 nd extraction For n th extraction Vo org m1-m2 m2 Vw aq q 1 = m 1 m Fraction of m remaining in aqueous phase at equilibrium q n = V w V w + K p V o n ( )
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Extraction as chelating complexes 8-Hydroxyquinoline HL HL H + + L - nL - + M n+ ML n ML n aq org At equilibrium HL aq org M n+ Initial K L K a K M Dithizone
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HL HL H + + L - nL - + M n+ ML n ML n aq org K L K a K M HL aq org M n+ M n+ (aq) + n HL (org) ML n(org) + n H + (aq) K ex log K ex pH Slope = n f(K p , [HL] org , n)
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HL HL H + + L - nL - + M n+ ML n ML n aq org K L K a K M HL aq org M n+ M n+ (aq) + n HL (org) ML n(org) + n H + (aq) K ex pH Percentage extracted Decreasing [HL] org
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