Thermodynamic study of fatty acids adsorption on different adsorbents

Freitas, Alessandra Fequetia; Mendes, Marisa Fernandes; Coelho, G. L. V.

doi:10.1016/j.jct.2006.12.016

Cited by 70 publications

(38 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This suggests that longer carboxylic acids render the alumina surface less hydrophilic more effectively. Indeed, since the solubility of the carboxylic acids diminish as the length of the hydrocarbon chain increases these molecules tend to move from the solution to the solid surface, thus reducing the hydrophilic character of the solid [37].…”

Section: Contact Angle Of Carboxylic Acids On Alumina Surfacementioning

confidence: 99%

Contact angle and adsorption behavior of carboxylic acids on α-Al2O3 surfaces

Megı́as-Alguacil

Tervoort

Cattin

et al. 2011

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Contact Angle Of Carboxylic Acids On Alumina Surfacementioning

confidence: 99%

Contact angle and adsorption behavior of carboxylic acids on α-Al2O3 surfaces

Megı́as-Alguacil

Tervoort

Cattin

et al. 2011

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…The presence of formic acid and acetic acid in industrial effluents poses a serious environmental problem. The major ill effects caused by these acids are formation of kidney stones, vomiting and general body weakness (Kannan and Xavier 2001;Freitas et al 2007). Thus, it is imperative that they are removed from industrial wastes before discharging them into the water body.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of formic and acetic acids from aqueous solution using activated carbon from shea butter seed shells

Adekola

Oba

2016

Appl Water Sci

View full text Add to dashboard Cite

The efficiency of prepared activated carbon from shea butter seed shells (SB-AC) for the adsorption of formic acid (FA) and acetic acid (AA) from aqueous solution was investigated. The effect of optimization parameters including initial concentration, agitation time, adsorbent dosage and temperature of adsorbate solution on the sorption capacity were studied. The SB-AC was characterized for the following parameters: bulk density, moisture content, ash content, pH, Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The optimal conditions for the adsorption were established and the adsorption data for AA fitted Dubinin-Radushkevich (D-R) isotherm well, whereas FA followed Langmuir isotherm. The kinetic data were examined. It was found that pseudo-second-order kinetic model was found to adequately explain the sorption kinetic of AA and FA from aqueous solution. It was again found that intraparticle diffusion was found to explain the adsorption mechanism. Adsorption thermodynamic parameters were estimated and the negative values of DG showed that the adsorption process was feasible and spontaneous in nature, while the negative values of DH indicate that the adsorption process was exothermic. It is therefore established that SB-AC has good potential for the removal of AA and FA from aqueous solution. Hence, it should find application in the regular treatment of polluted water in aquaculture and fish breeding system.

show abstract

“…Which indicates how adsorbate molecules are distributed between the liquid phase and solid phase when the adsorption process reaches equilibrium [22][23] . In this study, three isotherms were used for describing the experimental results, namely the Freundlich isotherm, the Langmuir isotherm and the Temkin isotherm.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…This isotherm assumes that as the adsorbate concentration increases, the concentration of adsorbate on the adsorbent surface also increase 23,24 . The Freundlich isotherm is expressed by the following empirical equation:…”

Section: Freundlich Isothermmentioning

confidence: 99%