Solvent extraction of toxic heavy metals with 8-hydroxyquinoline extractants from effluents

Gole, K.; Stephan, Holger; Krüger, Torsten; Möckel, A.; Woller, N.; Subklew, G.; Schwuger, M. J.; Neumann, R.; Weber, Edwin

doi:10.1007/bfb0114460

Cited by 13 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As is shown in Figure , in fact, a significantly higher extractability of Cd(II) and Hg(II) is observed if decanol-1 is added as a modifier to the system with 5 .…”

Section: Resultsmentioning

confidence: 75%

“…Under the commercially available chelating extractants, 7-alkyl-8-hydroxyquinoline ( 5) , well-known as Kelex 100 (Witco) or LIX 26 (Henkel), is an interesting type, which is useful for the winning of copper 1 and gallium . Also, its applicability for the separation of toxic heavy-metal ions from dilute solutions has been discussed. , We have already shown that the simultaneous separation of the heavy-metal ions Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) with Kelex 100 from percolating water model solutions is still possible, but the extraction efficiency for Cd(II) and Hg(II) is only low 3 Extractability of heavy-metal ions with 8-hydroxyquinolines 5 (Kelex 100) and 6 .…”

Section: Resultsmentioning

confidence: 99%

“…14, 15 We have already shown that the simultaneous separation of the heavy-metal ions Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) with Kelex 100 from percolating water model solutions is still possible, but the extraction efficiency for Cd(II) and Hg-(II) is only low. 16 An improvement of the extraction power of extractant 5 (Kelex 100), especially toward Hg(II) and Cd(II), should be possible by two different ways: on the one hand, by use of synergistic effects with additives and, on the other hand, by structure modification via electronic and steric effects in the molecule.…”

Section: -Hydroxyquinolinesmentioning

confidence: 99%

“…As is shown in Figure 3, in fact, a significantly higher extractability of Cd(II) and Hg(II) is observed if de-canol-1 is added as a modifier to the system with 5. 16 Above all, this result is due to a direct interaction of the alcohol with the extracted metal chelate, forming a mixed complex. 17 The so-called assembly effect, which allows a preorganization of the potential ligand molecules decanol-1 and 8-hydroxyquinoline, could also play a role because it has already been described for comparable systems, 7 because the interactions between this two components via hydrogen bonding has been proven.…”

Section: -Hydroxyquinolinesmentioning

confidence: 99%

See 3 more Smart Citations

Preorganized Complexing Agents as a Tool for Selective Solvent Extraction Processes

Chartroux

Wichmann

Goretzki

et al. 2000

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Solvent extraction as a well-established process in hydrometallurgy, waste treatment, and material preparation requires selective and effective complexing agents with high lipophilicity. The extractant types used in industry reach from simple acids, ethers, and esters to more complex chelating agents. Nowadays the progress of supramolecular chemistry offers interesting possibilities to control the selectivity of metal extraction and to achieve a tailored ligand. In this paper, solvent extraction studies are presented for transition-metal ions with position isomers of alkylated 8-hydroxyquinolines from the chelating type as well as for amino and imino cage compounds and their acyclic counterparts from the supramolecular type. In all cases the extraction selectivity and efficiency strongly depend both on the extractant architecture and on the aqueous-phase composition. It is clearly shown that manipulation of the chemistry in the investigated systems leads to significant changes of the graduated extractabilities.

show abstract

“…As is shown in Figure , in fact, a significantly higher extractability of Cd(II) and Hg(II) is observed if decanol-1 is added as a modifier to the system with 5 .…”

Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Section: -Hydroxyquinolinesmentioning

confidence: 99%

Section: -Hydroxyquinolinesmentioning

confidence: 99%

See 2 more Smart Citations

Preorganized Complexing Agents as a Tool for Selective Solvent Extraction Processes

Chartroux

Wichmann

Goretzki

et al. 2000

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

Hollow‐fiber dispersion‐free extraction and stripping of Pb(II) in the presence of Cd(II) using D2EHPA under recirculating operation mode

Escobar

Schimmel

Gyves

et al. 2004

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Lead(II) and cadmium(II) solvent extraction (SX) with D2EHPA dissolved in heptane and kerosene from aqueous chloride media was studied. Extraction reaction stoichiometries and extraction equilibrium constants were evaluated. Application of a dispersion-free membrane-based extraction and stripping technique with two hollow-fiber contactors under recirculating operation mode allowed a quantitative (>97%) removal of lead from the aqueous solution in the extraction module with a separation factor of 19 and a 62% recovery in the back-extraction module with a separation factor of 6.3 after 7 h under optimum conditions. Mass-transfer coefficients for the system were evaluated. Optimal conditions for transport and separation are reported and compared using SX and the membrane-based technique.

show abstract

Compounds Derived from 9,9‐Dialkylfluorenes: Syntheses, Crystal Structures and Initial Binding Studies (Part II)

2023

View full text Add to dashboard Cite

New representatives of 2,4,7-trisubstituted 9,9-dialkyl-9H-fluorenes were prepared and used for crystallographic investigations as well as initial binding studies towards metal ions and carbohydrates. The binding studies, which included 1 H NMR spectroscopic titrations and fluorescence measurements, demonstrated the ability of the tested fluorene-based compounds to act as complexing agents for ionic and neutral substrates. Depending on the nature of the subunits of the fluorene derivatives, "turn on" or "turn off" fluorescent chemosensors can be developed. Compounds composed of 4,6-dimethylpyridin-2-yl-aminomethyl moieties have the potential to be used as sensitive "turn-on" chemosensors for some metal ions.

show abstract

Solvent extraction of toxic heavy metals with 8-hydroxyquinoline extractants from effluents

Cited by 13 publications

References 7 publications

Preorganized Complexing Agents as a Tool for Selective Solvent Extraction Processes

Preorganized Complexing Agents as a Tool for Selective Solvent Extraction Processes

Hollow‐fiber dispersion‐free extraction and stripping of Pb(II) in the presence of Cd(II) using D2EHPA under recirculating operation mode

Compounds Derived from 9,9‐Dialkylfluorenes: Syntheses, Crystal Structures and Initial Binding Studies (Part II)

Contact Info

Product

Resources

About