Large Extractability of Aluminium(III) with 2-Methyl-8-quinolinol Derivatives in the Presence of 3,5-Dichlorophenol

Choi, Sung Yong; Imura, Hisanori; Ohashi, Kousaburo

doi:10.2116/analsci.16.923

Cited by 9 publications

(6 citation statements)

References 20 publications

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“…The structures and names of considered 8-hydroxyquinolinols are indicated in Appendix A. The dissociation constants of 8-hydoxyquinoline and its derivatives determined experimentally in aqueous and water–dioxane solutions, − collected in Tables and , have been selected as a training set in the performed LEFR analysis. Dissociation constants of 8-hydroxyquinolinols ,,− from Table have been applied as a test set.…”

Section: Introductionmentioning

confidence: 99%

Linear Free Energy Relationship (LFER) Analysis of Dissociation Constants of 8-Hydroxyquinoline and Its Derivatives in Aqueous and Dioxane–Water Solutions

et al. 2013

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The linear free energy relationship (LFER) analysis based on the Hammett equation has been applied for dissociation processes of 8-hydroxyquinoline and its derivatives in aqueous and 1,4-dioxane-water solutions. The effects of temperature, composition, and ionic strength of the solutions have been discussed. The derived semiempirical correlations are of high statistical quality and of good predictive power which permit the reliable evaluation of dissociation constants 8-hydroxyquinoline and its derivatives under specified experimental conditions: (i) temperature from (289 to 333) K, (ii) mol fraction of 1,4-dioxane ranging from (0 to 0.380), and (iii) ionic strength of solution changing from 0 to 5 mol·dm–3.

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Section: Introductionmentioning

confidence: 99%

Linear Free Energy Relationship (LFER) Analysis of Dissociation Constants of 8-Hydroxyquinoline and Its Derivatives in Aqueous and Dioxane–Water Solutions

et al. 2013

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“…Large synergistic effects of Hdcp on the extractions of gallium(III) and aluminium(III) with HA were previously found. 10,11 The remarkably large synergistic effect observed here should be ascribed to an increase in the hydrophobicity of the extracted vanadium(V) complex by the formation of ternary-complexes between the vanadium(V)-HA complex and Hdcp or TOPO. This is discussed below in detail.…”

Section: Extraction Behavior Of Vanadium(v) With Ha In the Absence Anmentioning

confidence: 79%

“…From Eqs. (6), (11), and (21), the synergistic extraction constant can be expressed as Kex,s,Hdcp = Kexβass,1,Hdcp and be obtained as listed in Table 2.…”

Section: Extraction Equilibrium Of Vanadium(v) With Ha In the Presencmentioning

confidence: 99%

“…5,6 However, despite this advance, there are few reports [7][8][9] in which the extraction equilibria of metal ions with HA are mentioned in detail. Previously, we reported on a large synergism of 3,5-dichlorophenol (Hdcp) in the extraction of gallium(III) 10 and aluminium(III) 11 with 2-methyl-8-quinolinol derivatives (HA). This synergistic effect of Hdcp was explained by the formation of ternary complexes, such as Ga(dcp)(A)2, Ga(dcp)(A)2•Hdcp and Al(dcp)(A)2•Hdcp, containing both a mixed-ligand complex and an association complex.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic Effect of 3,5-Dichlorophenol and Trioctylphosphine Oxide on the Extraction of Vanadium(V) with 2-Methyl-8-quinolinol Derivatives

et al. 2002

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The extraction of vanadium(V) with 2-methyl-8-quinolinol derivatives (HA), such as 2-methyl-8-quinolinol (HMQ), 2-methyl-5-butyloxymethyl-8-quinolinol (HMO4Q), and 2-methyl-5-hexyloxymethyl-8-quinolinol (HMO6Q), from a weakly acidic solution into chloroform was studied in both the absence and presence of 3,5-dichlorophenol (Hdcp) and trioctylphosphine oxide (TOPO) as the synergists. Vanadium(V) was extracted with HA as VO(OH)(A)2 in the absence of synergists, and its extractability increased with an increase in the hydrophobicity of HA. Vanadium(V) was quantitatively extracted from the lower pH region upon the addition of Hdcp and TOPO as VO(OH)(A)2 x Hdcp and VO2(A)(TOPO), respectively. The enhancement of the synergistic effect of Hdcp on the extraction of vanadium(V) with HA increased in the following order: HMQ < HMO4Q < HMO6Q, as opposed to that of TOPO. This result was ascribable to the difference in the mechanisms of the occurrence of the synergistic effect by Hdcp and TOPO.

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“…The risk assessment of ''reactive aluminium'' requires a simple tool for obtaining primary information about ''Al reactivity changes'' in sedimentary (soil) systems. The environmental fate of aluminium and chelating agents is worthy for remark and consideration (Choi et al 2000). The screening evaluation of the bioavailable Al forms in the way of single step EDTA extraction would be very practical.…”

Section: Introductionmentioning

confidence: 99%

Simple assessment of the reactive aluminium in sediments

2008

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The mobility of aluminium in sediments was evaluated through a one-step extraction with a strong chelating agent. Single and sequential extraction procedures for the extraction of Al were applied to four sediments from a polluted region. A single-step extraction with 0.05 mol L -1 ethylenediaminetetraacetic acid (EDTA) was used, and compared with a standardized SEP as reference. The Al contents extracted into Na 2 EDTA were in good agreement with the sequential extraction that yeilds mobile and potentially mobile portion of Al. Extracted EDTA contents make up more than 70% of the first-three-step sum of the five-step extraction procedure. Thus, Na 2 EDTA extraction of Al could be applied to assess aluminium mobility changes in sediments and soils.

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Large Extractability of Aluminium(III) with 2-Methyl-8-quinolinol Derivatives in the Presence of 3,5-Dichlorophenol

Cited by 9 publications

References 20 publications

Linear Free Energy Relationship (LFER) Analysis of Dissociation Constants of 8-Hydroxyquinoline and Its Derivatives in Aqueous and Dioxane–Water Solutions

Linear Free Energy Relationship (LFER) Analysis of Dissociation Constants of 8-Hydroxyquinoline and Its Derivatives in Aqueous and Dioxane–Water Solutions

Synergistic Effect of 3,5-Dichlorophenol and Trioctylphosphine Oxide on the Extraction of Vanadium(V) with 2-Methyl-8-quinolinol Derivatives

Simple assessment of the reactive aluminium in sediments

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