Document Detail


Extraction and transport of chromium(VI) through a bulk liquid membrane containing triphenylphosphine.
MedLine Citation:
PMID:  15689029     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The solvent extraction of chromium(VI) in chloroform, dichloromethane, dichloroethane and its transport through a chloroformic bulk liquid membrane from sulphuric acid solutions with the neutral extractant triphenylphosphine (TPP) were studied. It was highlighted that the TPP extractant is an interesting complexing and efficient carrier for transport of chromium(VI) as [(HTPP)HCr2O7] complex from a 2M sulphuric acid solutions. It has a high ability to concentrate the chromium(VI) in the receiving phase according to the Donnan equilibrium. The co-extraction and the co-transport of sulphuric acid is very low and has no effect on the transport efficiency. The transport rate depends mainly on the initial concentration of the extractant.
Authors:
Amar Sahmoune; Lynda Mitiche
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annali di chimica     Volume:  94     ISSN:  0003-4592     ISO Abbreviation:  Ann Chim     Publication Date:  2004 Dec 
Date Detail:
Created Date:  2005-02-03     Completed Date:  2005-03-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7610375     Medline TA:  Ann Chim     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  929-38     Citation Subset:  IM    
Affiliation:
Laboratoire de recherche sur l'Eau, Université Mouloud Mammeri, 15000 Tizi-Ouzou, Algérie. asahm@caramail.com
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MeSH Terms
Descriptor/Qualifier:
Biological Transport
Chloroform / chemistry
Chromium / isolation & purification*
Ethylene Dichlorides / chemistry
Filtration / methods
Membranes
Methylene Chloride / chemistry
Organophosphorus Compounds / chemistry*
Phosphines / chemistry
Sulfuric Acids / chemistry
Thermodynamics
Chemical
Reg. No./Substance:
0/Ethylene Dichlorides; 0/Organophosphorus Compounds; 0/Phosphines; 0/Sulfuric Acids; 107-06-2/ethylene dichloride; 18540-29-9/chromium hexavalent ion; 603-35-0/triphenylphosphine; 67-66-3/Chloroform; 7440-47-3/Chromium; 75-09-2/Methylene Chloride; 7664-93-9/sulfuric acid; 7803-51-2/phosphine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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