It has been shown recently that small organic molecules, used as dispersants in the colloidal processing of ceramic powders to adjust the forces between the particles, are quite efficient in preparing aqueous suspensions of high solid loadings and low viscosity. One of them is 4,5-dihydroxy-1,3-benzenedisulfonic acid, disodium salt monchydrate, ((OH)(2)C6H2(SO3Na)(2).H2O), commercially known as Tiron. The adsorption of Tiron, as a function of its concentration and solution pH, onto alumina was investigated by the solution depletion method, applying UV spectrophotometry. KNO3 (10(-2) Mol/l) was used as the background electrolyte. The obtained results indicate an increase in the amount of adsorbed Tiron with its increasing concentration. The maximum adsorption was recorded at p approximate to 7 7 when the Tiron molecule was uncharged, i.e. undissociated (pKa(1)=7.6). The experimental data were fitted with different adsorption isotherm models. The maximum amount of Tiron adsorbed, as well... as the constants of adsorption process were calculated.
Keywords:
Adsorption / alumina / isotherms / tiron
Source:
Materials Science Forum, 2005, 494, 399-404
Note:
Current Research in Advanced Materials and Processes, 6th Conference of the Yugoslav-Materials-Research-Society, Sep 13-17, 2004, Herceg Novi, Montenegro
TY - JOUR
AU - Rocen, JJ
AU - Cerovic, LS
AU - Milonjić, Slobodan K.
PY - 2005
UR - http://vinar.vin.bg.ac.rs/handle/123456789/6534
AB - It has been shown recently that small organic molecules, used as dispersants in the colloidal processing of ceramic powders to adjust the forces between the particles, are quite efficient in preparing aqueous suspensions of high solid loadings and low viscosity. One of them is 4,5-dihydroxy-1,3-benzenedisulfonic acid, disodium salt monchydrate, ((OH)(2)C6H2(SO3Na)(2).H2O), commercially known as Tiron. The adsorption of Tiron, as a function of its concentration and solution pH, onto alumina was investigated by the solution depletion method, applying UV spectrophotometry. KNO3 (10(-2) Mol/l) was used as the background electrolyte. The obtained results indicate an increase in the amount of adsorbed Tiron with its increasing concentration. The maximum adsorption was recorded at p approximate to 7 7 when the Tiron molecule was uncharged, i.e. undissociated (pKa(1)=7.6). The experimental data were fitted with different adsorption isotherm models. The maximum amount of Tiron adsorbed, as well as the constants of adsorption process were calculated.
T2 - Materials Science Forum
T1 - Adsorption of Tiron onto alumina
VL - 494
SP - 399
EP - 404
ER -
@article{
author = "Rocen, JJ and Cerovic, LS and Milonjić, Slobodan K.",
year = "2005",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/6534",
abstract = "It has been shown recently that small organic molecules, used as dispersants in the colloidal processing of ceramic powders to adjust the forces between the particles, are quite efficient in preparing aqueous suspensions of high solid loadings and low viscosity. One of them is 4,5-dihydroxy-1,3-benzenedisulfonic acid, disodium salt monchydrate, ((OH)(2)C6H2(SO3Na)(2).H2O), commercially known as Tiron. The adsorption of Tiron, as a function of its concentration and solution pH, onto alumina was investigated by the solution depletion method, applying UV spectrophotometry. KNO3 (10(-2) Mol/l) was used as the background electrolyte. The obtained results indicate an increase in the amount of adsorbed Tiron with its increasing concentration. The maximum adsorption was recorded at p approximate to 7 7 when the Tiron molecule was uncharged, i.e. undissociated (pKa(1)=7.6). The experimental data were fitted with different adsorption isotherm models. The maximum amount of Tiron adsorbed, as well as the constants of adsorption process were calculated.",
journal = "Materials Science Forum",
title = "Adsorption of Tiron onto alumina",
volume = "494",
pages = "399-404"
}
