Kinetic of chromium(III) transport through the double-carrier supported liquid membrane

Paweł Religa , Jakub Rajewski , Paulina Łobodzin

Abstract

The kinetics of chromium(III) transport through a supported liquid membrane containing both a di-(2-ethylhexyl) phosphoric acid (D2EHPA) and bis-(2,4,4-trimethylpentyl) phosphinic acid (Cyanex272) as an ions carrier was investigated. It was found that under a characteristic concentration of the carriers into the organic phase membrane provides much higher efficiency than the membrane containing only one of the extractants. In the studied system the optimal carrier concentration in the membrane is 0.16 mol/dm3 and 0.9 mol/dm3 for Cyanex272 and D2EHPA, respectively. Moreover, the authors indicate that only D2EHPA can act as an individual carrier in the membrane. In the case of Cyanex272 the stable structures with chromium(III) ions are formed in the membrane, which prevents effective re-extraction. Additionally, intensive stirring of an aqueous phase in another factor that has a positive influence on the transport kinetics in the double-carrier membrane. Increasing a stirring rate up to 1200 rpm shortens the process time and allows total re-extraction of chromium.
Author Paweł Religa - [Kazmierz Pulaski University of Technology and Humanities (UTHRAD)]
Paweł Religa,,
-
- Uniwersytet Technologiczno-Humanistyczny im. Kazimierza Pułaskiego w Radomiu
, Jakub Rajewski ZPR
Jakub Rajewski,,
- Department of Separation Processes
, Paulina Łobodzin - [Instytut Technologii i Eksploatacji w Radomiu]
Paulina Łobodzin,,
-
- Instytut Technologii i Eksploatacji w Radomiu
Journal seriesPhysicochemical Problems of Mineral Processing, ISSN 1643-1049 [0137-1282]
Issue year2016
Vol52
No1
Pages87-97
Publication size in sheets0.5
Keywords in EnglishSLM, chromium, D2EHPA, Cyanex27, separation, membrane
URL http://www.ppmp.pwr.wroc.pl/sorpa/3a85ae68fcbd47da99047355693d3662/volume
Languageen angielski
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Religa, P. (i in.) - Kinetic of chromium(III)....pdf (file archived - login or check accessibility on faculty) Religa, P. (i in.) - Kinetic of chromium(III)....pdf 389.2 KB
Score (nominal)25
ScoreMinisterial score = 20.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 0.901 (2) - 2016=1.013 (5)
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