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Electro-driven extraction of low levels of lipophilic organic anions and cations across plasticized cellulose triacetate membranes: effect of the membrane composition

Hong, Heng See and Hausera, Peter C. (2014) Electro-driven extraction of low levels of lipophilic organic anions and cations across plasticized cellulose triacetate membranes: effect of the membrane composition. Journal of Membrane Science, 450 . pp. 147-152. ISSN 0376-7388

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Official URL: https://dx.doi.org/10.1016/j.memsci.2013.08.043

Abstract

A fundamental study in view of employing plasticized cellulose triacetate membranes for electrodriven extraction of lipophilic anions and cations in analytical applications was carried out. Propanesulfonate, heptanesulfonate and decanesulfonate as well as tetraethylammonium, tetrabutylammonium, tetrapentylammonium were used as anionic and cationic organic model ions respectively. The membrane compositions consisted of cellulose triacetate as base polymer, either of the plasticizers 2-fluorophenyl 2-nitrophenyl ether, o-nitrophenyl octyl ether, bis(2-ethylhexyl) adipate and tris(2-ethylhexyl) phosphate of different lipophilicity, as well as Aliquat 336 or di-(2-ethylhexyl) phosphoric acid (D2EHPA) as cationic and anionic carriers. Similar results were obtained for both, the anions and cations. The transport of the target ions was possible to some extent with membranes not containing plasticizer but was improved with the plasticizer. Less of the more lipophilic plasticizers was needed in the membranes for most efficient transport. The transport efficiency was also showing a dependence on the identity of the target ions, the smaller and less lipophilic species were generally more efficiently transported than the larger ones, which also tended to become trapped in membranes containing large amounts of carrier.

Item Type:Article
Uncontrolled Keywords:polymer inclusion membrane, electro-driven extraction, plasticizer, organic ions
Subjects:Q Science
Divisions:Science
ID Code:52648
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:01 Feb 2016 11:53
Last Modified:30 Jun 2018 06:47

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