Separation of antimony(III) with iodide and dithizone by sorption on polyurethane foam from sulphuric acid medium for its spectrophotometric determination in glasses

Raychaudhuri, Alakananda; Roy, S. K.

doi:10.1016/0039-9140(94)80104-5

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…The high flow rate and inertness comparing to other bulky (granular) solids increases its applications in analytical and nuclear chemistry [3]. The properties of the PUR foam can easily be altered after immobilizing the foam with different organic reagents such as β-diketones [4,5], dithiozone [6,7], hetrocycloazodyes [8,9] etc. towards metal ions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of sorption of Tb(III) by 2-thenoyltrifluoroacetone supported onto polyurethane foam

Saeed¹,

Rusheed²

2002

Radiochimica Acta

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The sorption studies Tb(III) was investigated on HTTA loaded PUR foam. The adsorption conditions were optimized with respect to pH, shaking time, loading capacity and adsorbent weight. The adsorption data followed the classical Freundlich and Langmuir type isotherms successfully. The Freundlich constant (1/n) is estimated to be 0.47 ± 0.01, reflects a surface heterogeneity of the PUR foam. Langmuir isotherm gives a saturated capacity of 0.042 ± 0.001 mmole g −1 which suggests a monolayer coverage of the surface. The Dubinin-Radushkevich (D-R) isotherm is applied and the sorption mean free energy (E) is calculated and found to be 11.32 ± 0.14 kJ mol −1 suggesting that chemisorption involving chemical bonding is responsible for the adsorption process. The isosteric heat of adsorption of Tb(III) is high which decipher the surface heterogeneity, new bond formation and endothermic type chemisorption. The thermodynamics parameters such as enthalpy (∆H), entropy (∆S) and Gibbs free energy (∆G) were calculated and interpreted. The positive values of ∆H indicate that the adsorption of metal ions on HTTA-loaded PUR foam is an endothermic process. A possible explanation of this endothermicity and sorption mechanism have been discussed. The selectivity and sensitivity of the adsorbent was also studied. The sorption of Tb(III) is greatly affected in the presence of oxalate and fluoride. The sorptive affinity of different cations towards HTTA loaded PUR foam was also discussed.

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Section: Introductionmentioning

confidence: 99%

Investigation of sorption of Tb(III) by 2-thenoyltrifluoroacetone supported onto polyurethane foam

Saeed¹,

Rusheed²

2002

Radiochimica Acta

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“…Several chemical reagents are also reported for the spectrophotometric determination of antimony in environmental and biological samples, i.e. pyrogallol [26], sodium dodecylsulfate/nonylphenoxy polyethoxyethanol [27], brilliant green + hexachloroantimonate(V) + microcrystalline 1,4-dichlorobenzene [28], vanillylfluorone + poly(vinyl alcohol) [29], dibromodiethylbarbituric acid [30] and I 2 + dithiozone [31]. Among these, some of the methods lack selectivity, sensitivity and matrix interfere during analysis.…”

Section: Introductionmentioning

confidence: 98%

On-site spectrophotometric determination of antimony in water, soil and dust samples of Central India

Shrivas

Agrawal

Harmukh³

2008

Journal of Hazardous Materials

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“…The use of geomembranes in hazardous waste treatment has been increased in the recent past [1][2][3][4][5]. Polyether-based polyurethane (PU) foam are being studied by many scientists for the isolation of heavy metal ions like cobalt and antimony and absorption of phenol compounds in aqueous solutions [6][7][8]. Generally, the hazardous materials are to be stored in holding tanks or open ponds before the treatment.…”

Section: Introductionmentioning

confidence: 99%

Chemical compatibility of PU/PAN interpenetrating polymer network membrane with substituted aromatic solvents

Kumar¹,

Siddaramaiah²

2007

Journal of Hazardous Materials

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Separation of antimony(III) with iodide and dithizone by sorption on polyurethane foam from sulphuric acid medium for its spectrophotometric determination in glasses

Cited by 10 publications

References 12 publications

Investigation of sorption of Tb(III) by 2-thenoyltrifluoroacetone supported onto polyurethane foam

Investigation of sorption of Tb(III) by 2-thenoyltrifluoroacetone supported onto polyurethane foam

On-site spectrophotometric determination of antimony in water, soil and dust samples of Central India

Chemical compatibility of PU/PAN interpenetrating polymer network membrane with substituted aromatic solvents

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