Temat: cadmium (II) - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Lead(II) removal from aqueous solutions by solvent extraction with tetracarboxylresorcin[4]arene
Autorzy:: Konczyk, J.
Kozlowski, C.
Walkowiak, W.
Powiązania:: https://bibliotekanauki.pl/articles/110670.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: solvent extraction
lead(II)
zinc(II)
cadmium(II)
resorcinarene
Opis:: A novel tetracarboxylresorcin[4]arene was synthesized and its selective complexing ability towards Pb(II) ions was examined. The influence of several parameters such as pH of aqueous phase, agitation time, extractant and modifier concentrations on solvent extraction of Pb(II) ions from the aque-ous nitrate phase into chloroform organic phase was studied. The stoichiometry of the formed metal-ligand complexes was established by slope analysis. Pb(II) ions were quantitatively extracted in the form of 2:1 Pb(II)-resorcin[4]arene complex from aqueous solutions of pH 5.5 to the solution of ligand in chloroform. Competitive solvent extraction experiments in the presence of Zn(II) and Cd(II) ions were also carried out and high selectivity of the extractant towards Pb(II) over Zn(II) and Cd(II) was found. The selectivity order was: Pb(II) >> Cd(II) > Zn(II).
Źródło:: Physicochemical Problems of Mineral Processing; 2013, 49, 1; 213-222
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: N-(diethylthiophosphoryl)-aza[18]crown-6: synthesis and ability of solvent extraction toward lead(II), zinc(II) and cadmium(II) metal cations
Autorzy:: Kozlowska, J.
Miroshnichenko, S.
Powiązania:: https://bibliotekanauki.pl/articles/346955.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:: crown ethers
solvent extraction
lead(II)
zinc(II)
cadmium(II)
Opis:: This work presents the synthesis of a strongly hydrophobic, functionalized monaza crown ether, i.e., lariat ether, namely N-(diethylthiophosphoryl)-aza[18]crown-6 and its application as ion extractant in solvent extraction systems. The synthesis of thiophosphorylated aza[18]crown-6 was performed with good yield. Separation systems have been successfully developed to extract Pb(II), Cd(II) and Zn(II) into organic phase, i.e., chloroform with the crown ethers: aza[18]crown-6 and N-(diethylthiophosphoryl)-aza[18] crown-6 as extractants. The selectivity order in both crown ethers was Pb(II) >> Cd(II) > Zn(II). The obtained results suggest that N-(diethylthiophosphoryl)-aza[18]crown-6 can be used for the selective removal of Pb(II) at lower pH values than aza[18]crown-6.
Źródło:: Ars Separatoria Acta; 2012-2013, 9/10; 7-14
1731-6340
Pojawia się w:: Ars Separatoria Acta
Dostawca treści:: Biblioteka Nauki

Artykuł

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