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Study on the extraction mechanism and thermodynamics of Pb(II) with a o-phenylendiamine tetraacetic acid
Accession number: 20173704159965
Authors: Wang, Junwei 1 ; Zhang, Dan 1 ; Dong, Yanjie 1   ; Lu, Lu 1 ; Wang, Wei 1 ; Zhang, Yuanguang 1
Author affiliation : 1 College of Chemistry and Chemical Engineering, Anhui Key Laboratory of Functional Coordination Compounds, Anqing Normal University, Anqing; 246011, China
Corresponding author: Dong, Yanjie (dongyjaqtc@163.com)
Source title: Russian Journal of Non-Ferrous Metals
Abbreviated source title: Russ. J. Non-ferrous Met.
Volume: 58
Issue: 4
Issue date: July 1, 2017
Publication Year: 2017
Pages: 351-356
Language: English
ISSN: 10678212
E-ISSN: 1934970X
Document type: Journal article (JA)
Publisher: Allerton Press Incorporation
Abstract: The extraction mechanism and thermodynamics of Pb(II) with a novel o-phenylendiamine tetraacetic acid (H4PDTA) were studied by high performance liquid chromatography with UV detector. The effects of extraction time, reciprocating oscillation frequency, Pb(II) concentration, H4PDTA concentration and Pb(II) solution acidity on Pb(II) extraction were investigated. The results showed that the extraction ratio of Pb(II) increased with an increase of pH and H4PEDTA concentration with a reciprocating oscillation frequency of 120 CPM (cycles per minute). The composition of the extraction complex was determined by slope methods and UV spectral analysis. The extraction mechanism of Pb(II) was proved to be a chelate extraction reaction and the values of thermodynamic function at 25¡ãC were determined: Kex¡¥ = 2.18 ¡Á 103, ¦¤Gr= ¨C19.05 kJ mol¨C1, ¦¤Hr= ¨C9.965 kJ mol¨C1and ¦¤Sr= 30.47 J mol¨C1K¨C1. © 2017, Allerton Press, Inc.
Number of references: 14
Main heading: Extraction
Controlled terms: Acidity -  High performance liquid chromatography -  Liquid chromatography -  Mechanisms -  Spectrum analysis -  Thermodynamics
Uncontrolled terms: Chelate extraction -  Extraction complex -  Extraction mechanisms -  Extraction ratio -  Oscillation frequency -  Solution acidity -  Tetraacetic acid -  Thermodynamic functions
Classification code: 601.3Mechanisms  -  641.1Thermodynamics  -  801.1Chemistry, General  -  802.3Chemical Operations
Numerical data indexing: Temperature 2.98e+02K
DOI: 10.3103/S1067821217040071
Database: Compendex
Compilation and indexing terms, © 2017 Elsevier Inc.
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