Hexavalent chromium recovery by liquid–liquid extraction with 2-octylaminopyridine from acidic chloride media and its sequential separation from other heavy toxic metal ions

This study examined the effect influence of various factors on the extraction of Pd(II) to develop a new liquid-liquid extraction mechanism for the selective separation of palladium(II) from its acidic chloride solutions using 4-aroyl-3-phenyl-5-isoxazolones (HA), such as 3-phenyl-4-(4-fluorobenzoyl)-5- isoxazolone (HFBPI), 3-phenyl-4-benzoyl-5-isoxazolone (HPBI) and 3-phenyl-4- (4-toluoyl)-5-isoxazolone (HTPI). The extraction strength of Pd(II) with HA were in the following order: HFBPI > HPBI > HTPI, which is opposite to that observed with their pKavalues. HPBI was used to separate Pd(II) from Pt(IV), Ni(II) and Rh(III) metal ions and calculated their separation factors (S.F.) were followed in the order: Pd/Ni (40±0.4) > Pd/Pt (25±0.2) > Pd/Rh (15±0.3 > Rh/Ni (2.7±0.3) > Pt/Ni ≈ Rh/Pt (1.7±0.2). The loading and striping of Pd(II) (1.12×10-4mol L-1) were also examined using 1.0×10-3mol L-1HPBI in CHCl3and 1.0 mol L-1HCl, respectively. The results demonstrated that the maximum (97.5%) extraction and desorption (89%) of metal required at least 3.0 cycles. The developed method was applied successfully to the separation of palladium from synthetic water samples.

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Colorimetric sensing approaches based on silver nanoparticles aggregation for determination of toxic metal ions in water sample: a review

International Journal of Environmental & Analytical Chemistry ◽

10.1080/03067319.2021.1873315 ◽

2021 ◽

pp. 1-16

Author(s):

Rajat Singh ◽

Rahul Mehra ◽

Ankita Walia ◽

Simmy Gupta ◽

Prince Chawla ◽

...

Keyword(s):

Silver Nanoparticles ◽

Metal Ions ◽

Water Sample ◽

Toxic Metal ◽

Colorimetric Sensing ◽

Toxic Metal Ions

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The facile soft-template-morphology-controlled (STMC) synthesis of ZnIn2S4 nanostructures and their excellent morphology-dependent adsorption properties

Journal of Materials Chemistry A ◽

10.1039/c9ta11800d ◽

2020 ◽

Vol 8 (4) ◽

pp. 1986-2000 ◽

Cited By ~ 3

Author(s):

Afaq Ahmad Khan ◽

Arif Chowdhury ◽

Sunita Kumari ◽

Sahid Hussain

Keyword(s):

Metal Ions ◽

Toxic Metal ◽

Adsorption Properties ◽

Organic Dye ◽

Soft Template ◽

Toxic Metal Ions ◽

Controlled Morphology

ZnIn2S4 nanostructures were fabricated with controlled morphology and utilized for the adsorption of an organic dye and toxic metal ions.

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Tuning the sensitivity towards mercury via cooperative binding to d-fructose: dual fluorescent chemosensor based on 1,8-naphthyridine-boronic acid derivative

RSC Advances ◽

10.1039/d1ra02122b ◽

2021 ◽

Vol 11 (24) ◽

pp. 14862-14870

Author(s):

Marina Rajadurai ◽

E. Ramanjaneya Reddy

Keyword(s):

Metal Ions ◽

Acid Derivative ◽

Boronic Acid ◽

Toxic Metal ◽

Fluorescent Chemosensor ◽

Cooperative Binding ◽

Toxic Metal Ions

This new dual d-fructose–mercury chemosensor is the first example of utilizing boronic acid–diol complexation for enhancement of the sensor's sensitivity towards toxic metal ions.

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