کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9562593 | 1382959 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transport and separation properties of poly(oxypropylene) bisphosphates as macroionophores of alkali, alkaline-earth and transient metal cations in a hybrid liquid membrane system
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Transport and separation properties of poly(oxypropylene) bisphosphates as macroionophores of alkali, alkaline-earth and transient metal cations in a hybrid liquid membrane system Transport and separation properties of poly(oxypropylene) bisphosphates as macroionophores of alkali, alkaline-earth and transient metal cations in a hybrid liquid membrane system](/preview/png/9562593.png)
چکیده انگلیسی
Poly(oxypropylene) bisphosphates (POPBPs) have been synthesized by modification of polypropylene glycols (PPG400, 1200, 2000) and used as macroionophores of metal cations in a multimembrane hybrid system comprising a flowing liquid membrane unit, cation exchange, and pervaporation polymer membranes. POPBPs ability to mediate the selective pertraction of some cations from a multication mixture containing alkali (K+, Na+), alkaline earth (Ca2+, Mg2+) and transient metal cations (Zn2+, Cu2+) has been studied and compared with the properties of respective PPGs. POPBPs, after dissolving in 1,2-dichloroethane (liquid membrane phase), have been observed to transport and separate cations in the following order: Zn2+ > Cu2+ â«Â Ca2+, Mg2+, K+, Na+. An increase in the molecular mass of POP chain changes the position of K+ cations in the order from Zn2+ > Cu2+ > K+ ⩾ Na+, Ca2+ > Mg2+ to Zn+, K+ > Na+ > Ca2+ > Cu2+, Mg2+ as observed for PPG400 and PPG2000, respectively. High ionic fluxes and separation properties of POPBs are dependent mainly on the presence of ionisable phosphoric acid end-groups. These groups, in cooperation with poly(oxypropylene) chains, mediate the proton-coupled transport of cations (counter-transport) resulting in the effective up-hill transport of Zn2+ cations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 62, Issue 2, February 2005, Pages 195-208
Journal: Reactive and Functional Polymers - Volume 62, Issue 2, February 2005, Pages 195-208
نویسندگان
Romuald Wódzki, Marek ÅwiÄ
tkowski, Grzegorz Åapienis,